Burkert 8681 Operating Instructions Manual

Control head, 24 v dc, 120 v ac, as-i, devicenet, io-link, büs/canopen

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Type 8681

Control Head

Designs:

24 V DC, 120 V AC, AS-i,

DeviceNet, IO-Link, büS/CANopen

Operating Instructions

Table of Contents

Summary of Contents for Burkert 8681

Page 1 Type 8681 Control Head Designs: 24 V DC, 120 V AC, AS-i, DeviceNet, IO-Link, büS/CANopen Operating Instructions...
Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous resérve de modification techniques. © Bürkert Werke GmbH, 2010 - 2020 Operating Instructions 2004/07_EN_00806150 / Original DE...
Page 3: Table Of Contents
Intended application area ......................15 5.2 General description ........................15 5.3 Functions / options / variants ....................16 5.3.1 Structure of the control head ..................16 5.3.2 Fluid diagrams Type 8681 – examples................17 5.3.3 Number of solenoid valves .....................18 5.3.4 Pneumatic interfaces ......................19 5.3.5 Magnetic and mechanical manual override ..............19 5.3.6 Position measuring system .....................19...
Page 4 Control Head Type 8681 6.8 Factory settings in the firmware ....................28 6.8.1 Feedback fields (position measuring system) ..............28 6.8.2 Service / maintenance notification (maintenance request) ..........29 6.8.3 Manual override function (magnetic) ................29 6.9 Resetting the device (Device Reset) ..................30 ASSEMBLY ............................31 7.1 Safety instructions ........................31 7.2 Assembly of the control head ....................31 7.2.1 Hub flange / Adapter ......................32 7.2.2 Assembly sequence on the example of a double-seated valve ........33 7.2.3 Realignment of the control head ..................33 7.2.4...
Page 5 Control Head Type 8681 120 V AC - DESIGN ..........................47 11.1 Electrical connection options ....................47 11.2 Electrical data ..........................47 11.3 Design aid ...........................48 11.4 Safety instructions ........................49 11.5 Electrical installation / start-up ....................50 AS INTERFACE - DESIGN ........................53 12.1 Definition ............................53 12.2 Electrical connection options for AS interface ................54 12.3 Number of connectable control heads ..................54 12.4 Maximum length of the bus line ....................54 12.5 Electrical data ..........................55 12.6 Design aid ...........................57 12.7 Safety instructions ........................58...
Page 6 Control Head Type 8681 13.11 Configuration of the process data ....................70 13.11.1 Static input assemblies ....................70 13.11.2 Static output assembly ....................71 13.12 Configuration of the device .......................71 13.12.1 C onfiguration of the safety position of solenoid valves during a bus error ....71 13.12.2 C onfiguration example ....................72 13.13 Display of the status LEDs in the event of a bus error .............73 13.13.1 Status of the device status LED "Modules" ..............73 13.13.2 Status of bus status LED "Network" ................74 IO-LINK - DESIGN ..........................75...
Page 7 Control Head Type 8681 15.7 Safety position if the bus fails ....................90 15.8 Design aid ...........................91 15.9 Installation – Safety instructions ....................92 15.10 Gateway .............................92 15.11 Gateway installation ........................92 15.12 Electrical installation - büS/CANopen ..................93 15.12.1 Electronic module büS/CANopen: .................94 15.12.2 T erminal strip configuration: ...................94 15.12.3 Details on the DIP switches for colour coding: ...............94 15.13 Network topology of a büS CANopen system ................95 15.14 Configuring the Node ID / baud rate ..................95...
Page 8 Control Head Type 8681 ACCESSORIES FOR BÜS DEVICES ....................120 CABLING EXAMPLES (BÜS/CANOPEN) ..................122 CONNECTION OF AN EXTERNAL INITIATOR ...................125 SPECIAL DESIGNS ..........................127 19.1 Control head for double-acting actuators ................127 19.1.1 Anomalies ........................127 19.1.2 Fluid diagram .......................127 19.1.3 Activation of a double-acting actuator .................127 19.2 Control head (AS-i) with 2 external initiators ................128 19.2.1 Anomalies ........................128 19.2.2 Electrical installation and programming data ...............128...
Page 9 Control Head Type 8681 SERVICE MODE / MANUAL OVERRIDE ...................151 22.1 Magnetic manual override .......................151 22.2 Mechanical manual override ....................152 MAINTENANCE, TROUBLESHOOTING .....................153 23.1 Safety instructions ........................153 23.2 Safety positions ........................154 23.3 Maintenance / service ......................155 23.4 Cleaning ............................155 23.5 Malfunctions ..........................155 REPLACEMENT OF COMPONENTS AND MODULES ..............157 24.1 Safety instructions ........................157 24.2 Changing the electronic module .....................158 24.3 Changing the valves ........................159...
Page 10: Operating Instructions
Control Head Type 8681 Operating Instructions OPERATING INSTRUCTIONS The operating instructions describe the entire life cycle of the device. Keep these instructions in a location which is easily accessible to every user, and make these instructions available to every new owner of the device.
Page 11: Authorised Use
Control Head Type 8681 Authorised Use AUTHORISED USE Incorrect use of the control head Type 8681 may be dangerous to people, nearby equipment and the environment. The control head is designed for use as a control unit for pneumatically actuated process valves and / or for recording their switching statuses.
Page 12: Basic Safety Instructions
Control Head Type 8681 Basic Safety Instructions BASIC SAFETY INSTRUCTIONS These safety instructions do not consider any contingencies or incidents which occur during installation, operation and maintenance. The operator is responsible for observing the location-specific safety regulations, also with reference to the per son nel. DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)!
Page 13 Control Head Type 8681 Basic Safety Instructions NOTE! Electrostatic sensitive components/modules! • The device contains electronic components which react sensitively to electrostatic discharge (ESD). Contact with electrostatically charged persons or objects may be hazardous to these components. In the worst case scenario, they will be destroyed immediately or will fail after start-up. • Observe the requirements in accordance with EN 61340-5-1 to minimise or avoid the possibility of damage caused by sudden electrostatic discharge! • Also ensure that you do not touch electronic components when the operating voltage is on!
Page 14: General Information
“Downloads” / ”Software” . The EDS files for DeviceNet and büS/CANopen as well as the IODD file for IO-Link are saved in the ZIP container “Initiation Files”. Customer-specific software is only accessible via the customer login (e.g. data for the preconfigured ME43 gateway). Additional documents for the configuration of the variants “IO-Link” and “büS/CANopen” can also be found on the website either under Type 8681 or the respective type number, e. g.: • Software manual | Central configuration management • Operating instructions Type ME43 | Fieldbus gateway büS to Industrial Ethernet • Software manual Type 8920 | Bürkert Communicator english...
Page 15: System Description
System Description SYSTEM DESCRIPTION Intended application area The control head Type 8681 has been designed for use as an actuator for pneumatically operated process valves and / or for recording the switching status of these. General description The control head Type 8681 is used for actuating pneumatically operated process valves.
Page 16: Functions / Options / Variants
Fig. 1: Structure of control head Type 8681 (with 3 solenoid valves) ____________________________________________ *) If the solenoid valve is not present, the connection is sealed tightly with a cover plate. Control head versions without solenoid valves (i.e. “feedback top”) do not have any pneumatic connec- tions at the housing, see also chapter “5.3.3 Number of solenoid valves” and “Fig. 5”.
Page 17: Fluid Diagrams Type 8681 - Examples
Control Head Type 8681 System Description 5.3.2 Fluid diagrams Type 8681 – examples The following fluid diagrams show the internal pneumatic circuitry of the solenoid valves of the control head to the process valve being controlled. Variant with 3 solenoid valves – e.g. for double-seated (process) valves: with restriction capability for each solenoid valve (Type 6524, see “Fig. 6” on page 26) Solenoid valves Type 6524 Process valve Fig. 2:...
Page 18: Number Of Solenoid Valves
Control Head Type 8681 System Description Variant with 2 solenoid valves – e.g. for double-acting actuators: - with restriction capability for each solenoid valve (Type 6524, see “Fig. 6” on page 26) - for safety position: solenoid valve V1 as NC valve, solenoid valve V2 as NO valve - see also chapter “19 Special designs” on page 127 Process valve...
Page 19: Pneumatic Interfaces
Control Head Type 8681 System Description 5.3.4 Pneumatic interfaces • Intake & exhaust air connections (1/P, 3/R): G 1/4 Working connections (2/A1 ... A3): G 1/8 • Integrated non-return valves in the solenoid valves' exhaust air duct • Actuation of Connection 2/A1 (Solenoid Valve 1; normally the main stroke of the process valve) using the magnetic manual override that is externally accessible via magnetic manual override tool.
Page 20: Other Features
Control Head Type 8681 System Description 5.3.7 Other features • Central optical position indicator (device status LED /Top LED) for showing the process valve switching positions: Positions and status information are generally indicated by 3 signal colours of the device status LED (Top LED), additional colours and display modes (e.g. NAMUR) are available for the büS/CANopen and the IO-Link design. The assignment of the signal colours and the “flashing patterns” indicating the status or type of error are described in detail in chapter “21 LED Colour Assignments”. • Simple adaptation of the control head (position measuring system) to the process valve piston rod / valve spindle • Simple adjustment of the position measuring system by means of 3 Teach buttons on the electronic module – either manual or automatic adjustment (manual Teach function or automatic Teach function (Autotune)) - see chapter “20.2” on page 131 • The capability of restricting the pilot valves (solenoid valves) for the individual setting of the expansion and retraction rates of the process valve and the individual setting of the flow-rate of the working connec- tions (see “Fig. 6” on page 26)
Page 21: Technical Data
Control Head Type 8681 Technical Data TECHNICAL DATA Operating conditions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` In the potentially explosive atmosphere, only use devices that are approved for this purpose.
Page 22: Type Label
Control Head Type 8681 Technical Data Type label The specifications on the type label indicate the technical data and approvals applicable to the respective control head. The symbols on the type label (example) mean: Type label Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 1 Device type Line 2 Device design: Type of communication (24 V DC, 120 V AC, AS-i, DevNet, IO-Link, büS/CANopen); (possibly supply voltage); Number of solenoid valves (“MV”): MV0 = no solenoid valve, MV1 = 1 solenoid valve, single-action, MV2 = 2 solenoid valves, not double-acting,...
Page 23: Additional Warning Signs
Control Head Type 8681 Technical Data Details of the Directives: ATEX Directive 2014/34/EU Ignition protection type: Gas ATEX category 3G Ex nA IIC T4 Gc X Dust ATEX category 3D Ex tc IIIC T135°C Dc X FM - Factory Mutual NI/I/2/ABCD/T5; +5°C < Ta < 55°C IP64 (cables and cable glands are not part of the FM approval of the device and are therefore not fitted at the factory.) c UL us - Underwriters Laboratories (Canada and USA) UL 61010-1 AND CSA C22.2 NO. 61010-1 Restrictions: Application area: 0 to +55°C,...
Page 24: Mechanical Data
Control Head Type 8681 Technical Data Mechanical data M16x1.5 (2x) Securing the hood with lead seal (max. Ø2) G1/4 (2x) G1/8 (3x) Fig. 4: Dimensional drawing (for models with 1 to 3 solenoid valves) english...
Page 25 Control Head Type 8681 Technical Data M16x1.5 (2x) Securing the hood with lead seal (max. Ø2) Sealed Fig. 5: Dimensional drawing (for models without solenoid valves = feedback top) Weight: Approx. 0.8 kg Housing material: exterior: PA, PC, PPO, VA inside: ABS, PA, PMMA Sealing material:...
Page 26: Pneumatic Data
Control Head Type 8681 Technical Data Pneumatic data Control medium: Air, neutral gases Quality classes in accordance with ISO 8573-1 (5 µm filter recommended) Dust content Quality class 7: m ax. particle size 40 μm, max. particle density 10 mg/m3 Water content Quality class 3: max. pressure dew point -20 °C or min. 10 °C below...
Page 27: Position Measuring System Data
Control Head Type 8681 Technical Data Position measuring system data Stroke range (measuring range): 0 ... 80 mm Resolution: ≤ 0.1 mm Total error: ± 0.5 mm - when using a target (in accordance with the dimensional drawing) and a piston rod (Ø 22 mm) (fault refers to the reproducibility of a taught position) Target material: ferromagnetic material (stainless steel 1.4021) Piston rod material: not ferromagnetic material (see note (*) below) “Fig. 7” shows the dimensional relationships between the control head and the piston with target. Note upper end position of the target (H 156.5 mm) to prevent...
Page 28: Factory Settings In The Firmware
Control Head Type 8681 Technical Data Factory settings in the firmware The control head is supplied with the firmware factory settings as listed below. Changes to the factory settings for the classic variants of Type 8681 (24 V DC, 120 V AC, AS-i, DeviceNet) are possible via the PC service program (see software manual: “Software manual Type 8681 | PC service program”). To do so, the control head is connected to the PC via the service interface on the electronic module – see „Fig. 9“. This involves removing the plastic cover (see chapter „8“).
Page 29: Service / Maintenance Notification (Maintenance Request)
6.8.2 Service / maintenance notification (maintenance request) Factory setting for the "Service/maintenance notification" function: not active. When Service/maintenance notification is activated, this is indicated by a special flashing pattern - see Chap. “21.2 Flashing pattern & fault signalling” on page 143, for the büS/CANopen design, see the „Addi- tional Instructions for Type 8681 büS/CANopen“. The Service/maintenance notification is used to observe predefined maintenance intervals which should occur either after an adjustable number of switching cycles or when a certain time has elapsed. The PC service program or the Bürkert Communicator is used – depending on the control head design – to adjust the service/maintenance interval (number of days or switching cycles) as well as activation/deactivation of the "Service/maintenance notification" function.
Page 30: Resetting The Device (Device Reset)
Control Head Type 8681 Technical Data Resetting the device (Device Reset) A restricted reset of the device to factory settings (Device Reset) can be performed using the: • PC Service Program (see: „Software manual Type 8681 | PC service program“) for “classic” designs or • Bürkert Communicator (for IO-Link and büS/CANopen design only) or • directly on the control head. Procedure (directly at the control head): → Simultaneously actuate T1 + T2 + T3 (approx. 2.5 s long) to access the "Device Reset" mode – the cor- responding flashing pattern depends on the design of the control head. If the device is not reset 10 s after switching to the „Device Reset“ mode, this mode is automatically left. → Simultaneously actuate T1 + T2 + T3 again (approx. 2.5 s long) – this will reset the device for real. The flashing pattern which depends on the design of the control head, indicates that the device was reset –...
Page 31: Assembly
Control Head Type 8681 Assembly ASSEMBLY Safety instructions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 32: Hub Flange / Adapter
Control Head Type 8681 Assembly 7.2.1 Hub flange / Adapter For the installation of the control head Type 8681 to a process valve (spindle), you will require a process valve-specific hub flange as an adapter. The hub flange must be adapted to the design of the process valve and produce the mechanical con- nection between the process valve and the control head. The axial fastening is done by two locking screws (shoulder screws M5), which engage in the middle groove of the hub flange (protection against pulling off). The control head can radially slide into any position in 360° arc, seamlessly.
Page 33: Assembly Sequence On The Example Of A Double-Seated Valve
Control Head Type 8681 Assembly 7.2.2 Assembly sequence on the example of a double-seated valve Procedure: → Mount the piston rod with the target on the process valve spindle. Observe reference dimensions! → Fasten the hub flange on the process valve - see “Fig. 10”. During this, observe central alignment and sealing conditions! →...
Page 34: Recommended Auxiliary Materials
Control Head Type 8681 Assembly Electrical installation Electrical installation and the communication connections depend on the control head variant: 24 V DC: see chapter “10 24 V DC - Design”, 120 V AC: see chapter “11 120 V AC - Design” AS interface: see chapter “12 AS Interface - Design”, DeviceNet: see chapter “13 DeviceNet - Design”, IO-Link: see chapter “14 IO-Link - Design”,...
Page 35: Opening And Closing The Housing
Control Head Type 8681 Opening and Closing the Housing OPENING AND CLOSING THE HOUSING Safety instructions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 36: Closing The Housing
Control Head Type 8681 Opening and Closing the Housing 8.2.2 Closing the housing If necessary, clean the seal contour of the seal and of the hood and lightly lubricate it using a silicone grease. Caution: Do not use any petroleum-based or synthetic lubricants (except for silicone grease)! Procedure: → Put the plastic hood on the lower part such that the inner "lugs" are positioned over the locking grooves and the external sealing lugs are positioned almost over each other.
Page 37: Pneumatic Installation
Control Head Type 8681 Pneumatic Installation PNEUMATIC INSTALLATION Safety instructions WARNING! Risk of injury from high pressure in the system! ` Before loosening lines and valves, turn off the pressure and vent the lines. Risk of injury from improper installation! ` Installation may be carried out by trained technicians only and with the appropriate tools! Risk of injury from unintentional activation of the system and uncontrolled restart! ` Secure system against unintentional activation.
Page 38: Flow Restriction Function Of The Solenoid Valves
Control Head Type 8681 Pneumatic Installation → Connect the required working connections 2/A1 to 2/A3 (according to the number of solenoid valves in the control head) with the corresponding connections on the process valve (“Fig. 12”). → Connect the supply line to supply pressure connection 1/P (observe the permissible pressure range, see chapter “6.6 Pneumatic data” on page 26). NOTE! Information to hose pipes! • Only use approved hose pipes with Ø6 mm (or 1/4") or Ø8 mm (or 5/16") outer diameters (tolerance: +0.05/-0.1 mm).
Page 39 Control Head Type 8681 Pneumatic Installation Settings of the flow-rate or the control speed with the help of the flow restriction screws: For proper setting, it is advisable to turn the two flow restriction screws initially into the minimum flow-rate position. The process valve will then initially move slowly so that you have more time to find the optimum setting during a switching operation.
Page 40: Dc - Design
Control Head Type 8681 24 V DC - Design 24 V DC - DESIGN 10.1 Electrical connection options The following connection concepts are available for the electrical connection of the control head: Cable gland Cable gland with multi-pole connection (M12 plug according to IEC 61076-2-101, 12-pole) Connection left: Voltage, signals...
Page 41 Control Head Type 8681 24 V DC - Design Solenoid valves: Typ. switching capacity: 0.9 W (per solenoid valve, for 200 ms after switching on) Typ. continuous output: 0.6 W (per solenoid valve, from 200 ms after switching on) Power consumption per solenoid valve: 50 mA at 12 V DC 25 mA at 24 V DC 22 mA at 28 V DC Operating mode: Long-term operation (100% ED) Central display of switching statuses: approx. 42 mA with a power supply of 24 V DC per illuminated display;...
Page 42: Design Aid
Control Head Type 8681 24 V DC - Design 10.3 Design aid Power consumption of the electronics: = 0.7 W = 30 mA at 24 V Power consumption of a valve during activation (200 ms): = 0.9 W = 38 mA at 24 V Valve-ON Valve-ON Power consumption of a valve after reduction: = 0.6 W...
Page 43: Safety Instructions
Control Head Type 8681 24 V DC - Design 10.4 Safety instructions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 44 Control Head Type 8681 24 V DC - Design NOTE! Use of the control head in a potentially explosive atmosphere ` Only use cables and cable glands which are approved for the respective application area and fit the cable glands according to the respective operating instructions! ` Close all unnecessary openings with lock screws/plugs approved for explosions area!
Page 45 Control Head Type 8681 24 V DC - Design Circuit diagram 24 V DC: Electronics Position measuring system with LEDs Power supply Service interface 24 V DC Ground Output position 1 (0/24 V, PNP) Output position 2 DIP switch (0/24 V, PNP) for LEDs Output position 3 (0/24 V, PNP) Output ext.
Page 46: Multi-Pole Connection
Control Head Type 8681 24 V DC - Design 10.5.2 Multi-pole connection Internal cabling work is not required for models with multi-pole connection, which makes installation and start-up on site considerably easier and quicker, reducing the risk of leaks. However, you will require the cor- respondingly packaged or assembled cable sets with the following pin assignment: Input and output signals to the higher-level control (PLC): 12-pole circular plug-in connector M12 x 1.0 - male (acc. to IEC 61076-2-101)
Page 47: Ac - Design
Control Head Type 8681 120 V AC - Design 120 V AC - DESIGN 11.1 Electrical connection options Cable gland: Connection left: Voltage, signals Connection right: external initiator Fig. 18: Connection concept 120 V AC 11.2 Electrical data Central power supply: 110 ... 130 V AC, 50/60 Hz Connections: Cable gland 1 x M16 x 1.5 cable gland/size22 - for power supply and signals...
Page 48: Design Aid
Control Head Type 8681 120 V AC - Design Feedback signal output: S4 out is directly connected to S4in Input / proximity switches (external initiator: S4 in): P ower supply: voltage present at control head UNominal = 120 V AC, 50/60 Hz Design: DC 2 and 3-wire, Normally open contact, L-switching Input current 1-signal: ISensor < 2 mA Inputs valve actuation (Y1 - Y3): Signal level - active: U >...
Page 49: Safety Instructions
Control Head Type 8681 120 V AC - Design Example 2: 3 valves have been activated simultaneously, one position is reported (persistent state): + 3 x P + 1 x P Total Valve 7.0 VA 1.2 VA + 3 x 1.4 VA + 1 x 1.6 VA + 3 x I + 1 x I...
Page 50: Electrical Installation / Start-Up
Control Head Type 8681 120 V AC - Design 11.5 Electrical installation / start-up DANGER! Risk of injury due to electric shock (110 ... 130 V AC)! ` Before reaching into the system (except for the Teach procedure in a non-explosive atmosphere) switch off the power supply and secure it to prevent restarting! ` Observe applicable accident prevention and safety regulations for electrical equipment! ` When setting the position measuring system (Teach procedure), do not contact any live components! Procedure: → Open the housing following the instructions in chapter “8 Opening and Closing the Housing”.
Page 51 Control Head Type 8681 120 V AC - Design 120 V AC Electronic module, terminal strip configuration: Service interface Teach buttons T1-3 Solenoid valve connection with status LED for valve V1 Terminal strip Protective conductor Solenoid valve connections (protective earth) with status LED for...
Page 52 Control Head Type 8681 120 V AC - Design Circuit diagram 120 V AC: Electronics Position measuring system with LEDs Protective Earthr Service interface Central power supply 120 V AC Output position 1 (0/120 V AC, L-switching) Output position 2 DIP switch for LEDs (0/120 V AC, L-switching)
Page 53: As Interface - Design
Control Head Type 8681 AS Interface - Design AS INTERFACE - DESIGN 12.1 Definition AS interface connection AS interface (Actuator Sensor Interface) is a field bus system which is used primarily for networking binary sensors and actuators (slaves) with a higher-level control (master). Connecting the control heads to higher bus systems is possible using commercially available gateways. Contact your distribution partner in this regard.
Page 54: Electrical Connection Options For As Interface
Control Head Type 8681 AS Interface - Design 12.2 Electrical connection options for AS interface The following connection concepts are available for the electrical connection of the control head: Cable gland with multi-pole connection Cable gland with multi-pole connection (M12 plug according to IEC 61076-2-101, 4-pole), (M12 plug according to IEC 61076-2-101, 4-pole), cable length approx.
Page 55: Electrical Data
Control Head Type 8681 AS Interface - Design Model Calculated line length (including internal cabling) Multi-pole, outer cable length approx. 15 cm 0.3 m Multi-pole, outer cable length approx. 80 cm 1.0 m Table 1: Calculated line length of the control head versions (cable length inside and outside) Example calculation line length: for multi-pole connection with approx.
Page 56 Control Head Type 8681 AS Interface - Design Connections: Multi-pole connection version: 1 x M16 x 1.5 cable gland / size19 with multi-pole connection (M12 plug according to IEC 61076-2-101, 4-pole) for power supply and signals, cable length approx. 15 cm or approx. 80 cm 1 x M16 x 1.5 cable gland/size19 - connection option for external...
Page 57: Design Aid
Control Head Type 8681 AS Interface - Design NOTE! If all 3 solenoid valves are simultaneously controlled via the AS interface, the electronics will activate the valves sequentially with a 200 ms time delay to protect the bus from overloads. External power supply for solenoid valves: External power supply: 19.2 V DC to 31.6 V DC The power supply unit must include a secure disconnect in accordance with IEC 60364-4-41.
Page 58: Safety Instructions
Control Head Type 8681 AS Interface - Design Calculation examples: Example 1: 3 valves are activated “simultaneously”, one position is reported (status for 200 ms): + 1 x P + 2 x P + 1 x P Slave Valve-ON Valve 4.1 W = 1.0 W + 1 x 0.9 W + 2 x 0.6 W + 1 x 1.0 W...
Page 59: Electrical Installation Of The As Interface
Control Head Type 8681 AS Interface - Design 12.8 Electrical installation of the AS interface Internal cabling work is not required for any of the AS Interface designs with multi-pole connection, which makes installation and start-up on site considerably easier and quicker, reducing the risk of leaks. However, you will require the correspondingly assembled cable sets with the following pin assignments. Likewise, the jumpers on the electronic module must be set correspondingly (see figures below). NOTE! Use of the control head in a potentially explosive atmosphere...
Page 60 Control Head Type 8681 AS Interface - Design The optional ribbon cable terminal contacts the AS interface cable harness by means of penetration technology which allows installation by "clipping in" the AS interface cable harness without cutting and without removing insulation.
Page 61: Programming Data
Control Head Type 8681 AS Interface - Design 12.9 Programming data The control heads have been configured as AS interface version with an extended address range (A/B slaves) for 62 slaves or optionally as an AS interface version for 31 slaves. A change between both control head configurations (for 62 slaves or 31 slaves) is only pos- sible by exchanging the electronic PCB! If one control head is replaced with another control head having a different configuration in the AS interface field bus system (e.g. AS interface version 62 slaves (A/B-Slave) to replace a device with AS interface version 31 slaves), a configuration error will be generated at the master due to the different ID codes! In this case (intentional replacement!), the current configuration must be re-programmed in the AS interface master.
Page 62: Devicenet - Design
Control Head Type 8681 DeviceNet - Design DEVICENET - DESIGN 13.1 Definition • The DeviceNet is a field bus system which is based on the CAN protocol (Controller Area Network). It enables actuators and sensors (slaves) to be networked with higher-level controllers (master). • The control head in the DeviceNet is a slave device according to the Predefined Master/Slave Connection Set stipulated in the DeviceNet specification. Polled I/O, Bit Strobed I/O and Change of Status (COS) are supported as I/O connection variants. • With DeviceNet it is necessary to differentiate between cyclical or event-driven high-priority process mes- sages (I/O Messages) and acyclical low-priority management messages (Explicit Messages). • The protocol process conforms to the DeviceNet specification Release April 2010. 13.2 Electrical connection option Cable gland with multi-pole connection (M12 plug according to IEC 61076-2-101, 5-pole), cable length approx. 80 cm Connection left:...
Page 63: Total Line Length And Maximum Line Length According To Devicenet Specification
Control Head Type 8681 DeviceNet - Design Inputs: 3 discrete feedback signals from the position measuring system (positions S1 - 1 discrete feedback signal from the external initiator (S4) 1 analog position signal in mm supply via DeviceNet string (11 ... 25 V DC) Switch level high signal ≥ 5 V Switch level low signal ≤ 1.5 V Outputs: 3 solenoid valves Power consumption from the bus: m ax. output 5 W, if all valves are switched (3 x type 6524 with 0.6 W each) 13.3.1 Total line length and maximum line length according to DeviceNet specification The bus line is a 4-core cable with additional shielding which must conform to the DeviceNet specification.
Page 64: Electrical Data
Control Head Type 8681 DeviceNet - Design 13.4 Electrical data Connections: "Multi-pole": 1 x M16 x 1.5 cable gland / size22 with multi-pole connection (M12 plug according to IEC 61076-2-101, 5-pole) for DeviceNet bus and power supply, cable length approx. 80 cm 1 x M16 x 1.5 cable gland/size19 - connection option for external...
Page 65: Design Aid
Control Head Type 8681 DeviceNet - Design 13.6 Design aid Power consumption of the electronics: = 1.44 W = 60 mA at 24 V Power consumption of a valve during activation (200 ms): = 0.9 W = 38 mA at 24 V Valve-ON Valve-ON Power consumption of a valve after reduction: = 0.6 W...
Page 66: Safety Instructions
Control Head Type 8681 DeviceNet - Design 13.7 Safety instructions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 67 Control Head Type 8681 DeviceNet - Design DeviceNet electronic module: Teach buttons T1-3 Solenoid valve connection with status LED for valve 1 Service interface DIP switches for setting the address and baud rate DIP switches for colour coding the device sta-...
Page 68: Network Topology Of A Devicenet System
Control Head Type 8681 DeviceNet - Design 13.9 Network topology of a DeviceNet system When installing a DeviceNet system, ensure that the terminating circuit of the data lines is correct. The circuit prevents the occurrence of interference caused by signals reflected onto the data lines. The trunk line must be terminated at both ends with resistors of 120 Ω and 1/4 W power loss (see “Fig. 30: Network topology”).
Page 69: 13.10.1 Settings Of The Devicenet Address
Control Head Type 8681 DeviceNet - Design 13.10.1 Settings of the DeviceNet address MAC ID address = Medium Access Control Identifier Address MAC ID address = [DIP 1 · 2 + DIP 2 · 2 + DIP 3 · 2 + DIP 4 · 2 + DIP 5 · 2 + DIP 6 · 2 with DIP x = off = 0 and DIP x = on =1 Table of the settings of the DeviceNet address: DIP1 DIP2 DIP3 DIP4 DIP5 DIP6 DIP1 DIP2 DIP3 DIP4 DIP5 DIP6...
Page 70: 13.10.2 Setting The Baud Rate
Control Head Type 8681 DeviceNet - Design 13.10.2 Setting the baud rate Adjustment of the control head to the baud rate of the network. Baud rate DIP 7 DIP 8 125 kBit/s 250 kBit/s 500 kBit/s not permitted: (on) (on)
Page 71: 13.11.2 Static Output Assembly
Control Head Type 8681 DeviceNet - Design The addresses listed in the table “Static input assemblies” can be used as path data for the Produced Con- nection Path attribute of an I/O connection. Nevertheless, by using this address data, the attributes combined in the assemblies can also be accessed acyclically via Explicit Messages. 13.11.2 Static output assembly Name...
Page 72: 13.12.2 Configuration Example
Control Head Type 8681 DeviceNet - Design 13.12.2 Configuration example The example describes the principle procedure when configuring the device using the RSNetWorx software for DeviceNet (Rev. 4.21.00). Installation of the EDS File The EDS file is installed with the aid of the EDS Installation Wizard Tool associated with RSNetWorx. During the installation procedure the icon can be assigned (if this does not occur automatically). Offline parameterisation of the device When a device has been inserted into the DeviceNet configuration of RSNetWorx, the device can be param- eterised offline. “Fig. 33” indicates how, for example, an input assembly which deviates from the factory setting (input process data can be transferred via I/O connection) can be selected. However, ensure that the length of the process data during a subsequent configuration of the DeviceNet master/scanner is adjusted accordingly. All parameter changes implemented offline must become operative for the real device at a later date by a download process. Fig. 32: Selecting the input assembly (screenshot)
Page 73: Display Of The Status Leds In The Event Of A Bus Error
Control Head Type 8681 DeviceNet - Design Online parameterisation of the device Devices can also be parameterised online. In doing so, you can also select whether only individual param- eters (single) or all parameters (all) of a group are read from the device (upload) or are loaded into the device (download). It is also possible to transfer individual parameters or all parameters of a group cyclically in monitor mode.
Page 74: 13.13.2 Status Of Bus Status Led "Network
Control Head Type 8681 DeviceNet - Design 13.13.2 Status of bus status LED "Network" Device status Explanation Troubleshooting No voltage / not • Device is not supplied with voltage • Connect other devices, if the online device is the only network • Device has still not ended...
Page 75: Io-Link - Design
Control Head Type 8681 IO-Link - Design IO-LINK - DESIGN IO-Link is a worldwide standardised IO technology (IEC 61131-9) for communicating with sensors and actuators. IO-Link is a point-to-point communication system with 3- or 5-conductor connection technology for sensors and actuators and unshielded standard sensor lines. Control head Type 8681 (IO-Link design) is available in 2 variants: • Port class A: w ith a shared power supply (Power 1) for supply of the system and actuators (solenoid valves) or • Port class B: w ith power supply (Power 1) for the system supply and Power 2 for separate supply of the...
Page 76: Quickstart For Type 8681 Io-Link
Power supply: Port class A: via IO-Link port (M12x1, 4-pole A-coded); Port class B: via IO-Link port (M12x1, 5-pole, A-coded), for details see chapter “14.5.5” and “Fig. 37” on page 83) Operation mode: I O-Link operation mode (SIO operation mode is not supported) IODD file: Download from: www.burkert.com / Type 8681 / Downloads / Software (“Initiation Files” - zip file) VendorID: 0x78, 120 DeviceID: See relevant IODD file (port class A or B) Transmission speed COM3 (230.4 kbit/s)
Page 77: Io-Link Master / Communication / Configuration
Control Head Type 8681 IO-Link - Design 14.4 IO-Link master / communication / configuration IO-Link master IO-Link masters are used as the interface between the control heads Type 8681 (IO-Link) and the higher- level controller. All commonly used IO-Link masters in accordance with the specification (see chapter “14.3”) can be used. The “addressing” of the IO-Link devices is defined by the connection or port on the IO-Link master – This must be noted when replacing the devices or master. Communication / configuration / parametrisation After the network has been set up (see for example “14.1 Network principle / interfaces”) and the correct software has been installed in the IO-Link devices (IODD taking into consideration the port class) the network is configured using the higher-level controller. As described in chapter “14.1”, an IO-Link control head can also be connected in parallel to the IO-Link port with the Bürkert Communicator (Type 8920) via the service interface (Micro-USB) on the electronic module...
Page 78: Electrical Data Of The Control Head
Control Head Type 8681 IO-Link - Design Connection lines: IO-Link devices and IO-Link masters are connected by unshielded 3- or 5-conductor standard lines maximum 20 m in length with a cross-section of ≥0.34 mm IO-Link port (left cable gland): I O-Link communication and power supply (Power 1 for port class A or Power 1 and 2 for port class B) Service interface (büS)
Page 79 Control Head Type 8681 IO-Link - Design Inputs (control head –> IO-Link master/PLC) / binary or analogue feedback signals: The recovery of the valve positions 3 reported back in binary format or the analogue position signal is described in chapter “20 Position Measuring System” on page 129. The analogue target position signal (resolution: 0.1 mm) is available as a cyclic value/ parameter.
Page 80: Design Aid
Control Head Type 8681 IO-Link - Design 14.5.3 Design aid The values were determined for the design voltage of 24 V DC. The different power supply of the system and actuators (solenoid valves) for port class A and B (see “Fig. 37”) must be taken into consideration when designing the voltage sources. Power/current consumption for port class A: Power consumption of the electronics: = 1.0 W = 42 mA at 24 V Power consumption of a valve during activation (200 ms): = 0.9 W...
Page 81 Control Head Type 8681 IO-Link - Design Power/current consumption for port class B: Power 1: Electronics supply (1) + display LED Power 2: Electronics supply (2) + actuators (solenoid valves in the control head) Power 1: Power consumption of the electronics (1): = 1.0 W = 42 mA at 24 V el 1 el 1 Power consumption of an optical position feedback: = 0.5 W...
Page 82: Electrical Installation - Io-Link
Control Head Type 8681 IO-Link - Design 14.5.4 Electrical installation – IO-Link For the versions with cable glands: → Open the housing (compare chapter “8 Opening and Closing the Housing” on page 35) so that the electronic module is visible as shown below (“Fig. 36”). → Connect the different wires of the cable (unshielded 3- or 5-line standard lines) to the connection terminals on the left side as described in chapter “14.5.5”. The assignment conforms to the IO-Link specification. Teach buttons T1-3 Solenoid valve connection with status LED for Valve V1...
Page 83: Pin Assignment (Port Class A Or B)
Control Head Type 8681 IO-Link - Design 14.5.5 Pin assignment (port class A or B) Designation Assignment (IO-Link Wire colour operation mode) 24 V DC brown DIO / 2L+ Not used (white) 0 V (GND) blue IO-Link black Table 4: Pin assignment for connecting port Class A (M12 connection, 4-pole)
Page 84: Software / Firmware Updates
Control Head Type 8681 IO-Link - Design 14.6 Software / firmware updates 14.6.1 Software The necessary start-up files and a description of the process data and acyclic parameters are available on the Internet and can be downloaded from the Bürkert website: www.burkert.com / search term: 8681 / Downloads / Software / “Initiation Files EDS IODD” (zip file) for port class A: Buerkert_Werke_GmbH-ControlHead8681_ClassA-YYYYMMDD-IODDx.x.XML for port class B: Buerkert_Werke_GmbH-ControlHead8681_ClassB-YYYYMMDD-IODDx.x.XML The corresponding icons and image files must also be downloaded. 14.6.2 Firmware updates Firmware updates can only be made using the büS service interface (Micro-USB) on the electronic module (see “Fig. 36” or chapter “14.5.4”). A büS stick and the Bürkert Communicator are required to do this. The Bürkert Communicator (Type 8920) can also be downloaded from the Bürkert website. For details on connecting the control head with the Bürkert Communicator see chapter “14.1 Network prin- ciple / interfaces” on page 75.
Page 85: 15 Büs/Can Open-Design
Control Head Type 8681 büS/CAN open-Design BÜS/CAN OPEN-DESIGN 15.1 Definition The “büS” (Bürkert system bus) is a fieldbus system based on the CAN protocol (Controller Area Network). It enables Bürkert devices to communicate with each other. The Control Head Type 8681 büS/CANopen is a device which conforms to the specification (see chapter “15.4”). 15.2 Network principle / Interfaces Fig. 38: Network principle The PC with the Bürkert Communicator can be connected to each free connection in the büS network, for example to one of the distributors. The control head can also be connected to the Bürkert-Communicator for individual configuration. This can be done (depending on the variant) via the M12 plug or via the connection terminal inside the device. In doing so, the control head must also be supplied with power.
Page 86 Control Head Type 8681 büS/CAN open-Design Different connection cables and a plug-in power supply unit as well as a mains adapter are included in a small equipment case (“USB büS interface Set1” - see in the last table “Standard service equipment“ in chapter “16 Accessories for büS devices” on page 120). This allows to configure also a single device. Important notes for network building: • Each gateway can control up to 63 nodes (Control Heads Type 8681 büS/CANopen) if the network topology considers the max. permitted cable length and the required power supply. Each node requires a unique “Node ID”, otherwise an error occurs. • The max. total line length is 200 m for 125 kbit/s, 100 m for 250 kbit/s, 40 m for 500 kbit/s.
Page 87: Quickstart For Type 8681 Büs/Canopen
Control Head Type 8681 büS/CAN open-Design 15.3 Quickstart for Type 8681 büS/CANopen “büS” (Bürkert system bus) stands for the communication bus developed by Bürkert and is based on the CANopen protocol. The following steps refer to the application of the e.g. EtherNet/IP protocol using a Bürkert gateway preconfigured for a maximum of 63 control heads. For other gateway configurations (e.g. in conjunction with ELEMENT positioners), the specific documentation for preconfigured Bürkert gateways must be observed. After mounting the control heads (Type 8681 büS/CANopen) in the network, the following operations must first be carried out on the control heads: 1.) Addressing of the control heads According to “15.14.2 Setting the büS/CANopen address (Node ID)” each control head in the network must be assigned its own unique address (Node-ID). When using a preconfigured gateway: For easy start-up, each control head should be assigned its unique node ID between 1 and 63 using the DIP switches. This allows the preconfigured communication settings...
Page 88: Büs/Canopen Specification
Control Head Type 8681 büS/CAN open-Design 15.4 büS/CANopen specification 15.4.1 General data Baud rate: c onfigurable via DIP switches 7, 8 or via software (selectable values – see chapter “15.14.1 Setting the baud rate”) factory setting: software configurable baud rate (pre-selected: 500 kbit/s) Address: 1 ... 63 (via DIP switches 1 ... 6 adjustable); factory settings: 0 = software configurable address / Node ID (Node ID from 1 to 127 possible; pre- selection: auto-addressing of the Node ID, see chapter “15.14.2 Setting the büS/CANopen address (Node ID)”) Bus mode: b üS or CANopen (bus mode is software configurable only) factory setting: büS Process data: büS/CANopen or e. g. EtherNet/IP (depending on configuration) 6 byte 1 (...6) byte...
Page 89: Electrical Connection Options
Control Head Type 8681 büS/CAN open-Design Max. total Max. length of an Max. total length of Baud rate line length individual drop line all drop lines 125 kbit/s 200 m 100 m 250 kbit/s 100 m 55 m 500 kbit/s...
Page 90: Safety Position If The Bus Fails
Control Head Type 8681 büS/CAN open-Design Input / proximity switches (external initiator: S4 in): Power supply: via the büS/CANopen power supply - 10% Current carrying capacity sensor supply: max. 30 mA Short-circuit protection Design: DC 2- and 3-wire, Normally open contact, PNP output Input current 1 signal: >...
Page 91: Design Aid
Control Head Type 8681 büS/CAN open-Design 15.8 Design aid Power consumption of the electronics: = 1.3 W = 54 mA at 24 V Power consumption of a valve during activation (200 ms): = 0.9 W = 38 mA at 24 V Valve-ON Valve-ON Power consumption of a valve after reduction: = 0.6 W...
Page 92: Installation - Safety Instructions
Control Head Type 8681 büS/CAN open-Design 15.9 Installation – Safety instructions WARNING! Risk of injury due to electric shock! ` Before reaching into the system (apart from the Teach procedure in a non-explosive atmosphere), switch off the voltage and secure to prevent it from being switched on again! ` Observe the applicable accident prevention and safety regulations for electrical equipment! ` When setting the position measuring system (Teach procedure), do not touch any live components! Risk of injury due to improper installation! ` Installation may be carried out by authorised technicians only and with the appropriate tools!
Page 93: Electrical Installation - Büs/Canopen
Control Head Type 8681 büS/CAN open-Design 15.12 Electrical installation - büS/CANopen For the multi-pole connection variants: No internal cabling work is required for any of the “büS” variants (with multi-pole connection) which makes installation and start-up on site considerably easier and quicker, reducing the risk of leaks. The control head features a multi-pole circular plug (M12 x 1, 5-pole, male) to an 80 cm long cable. The assignment conforms to the büS/CANopen specification. However, you will require the correspondingly assembled cable sets with the pin assignments described in the figure below: View of plug from the Pin 4: CAN_H Pin 3: V– front onto the pins: white black Pin 5: CAN_L...
Page 94: 15.12.1 Electronic Module Büs/Canopen
Control Head Type 8681 büS/CAN open-Design 15.12.1 Electronic module büS/CANopen: Teach buttons T1-3 Solenoid valve connection with status LED for valve V1 Service interface DIP switches for setting address and baud rate DIP switches for colour coding Status LED for device the Top LED (for more details see chapter “21” )
Page 95: Network Topology Of A Büs / Canopen System
Control Head Type 8681 büS/CAN open-Design 15.13 Network topology of a büS CANopen system When installing a büS/CANopen system, ensure that the terminating circuit of the data lines is correct. The circuit prevents the occurrence of interference caused by signal reflection in the data lines. The trunk line must be terminated at both ends with 120 Ω resistors and 1/4 W power loss - see “Fig. 43: Network topology - büS/CANopen”. “Fig. 43” illustrates a line with one trunk line and several drop lines. Trunk lines and drop lines consist of identical material.
Page 96: 15.14.1 Setting The Baud Rate
Control Head Type 8681 büS/CAN open-Design 15.14.1 Setting the baud rate Baud rate DIP 7 DIP 8 125 kbit/s 250 kbit/s 500 kbit/s Factory settings: software configurable baud rate*) with pre-setting: 500 kbit/s *) V ia software (Bürkert Communicator) configurable baud rates: 50, 125, 250, 500, 1000 kbit/s; via software (CANopen/SPS) additionally configurable baud rates: 10, 20, 100 kbit/s (see chapter “15.20.4 Access to further parameters (cyclic and acyclic)” on page 117). Please note: The baud rate of all network participants (control heads, gateway, possibly other products)
Page 97: Setting The Büs/Canopen Address (Node Id)
Control Head Type 8681 büS/CAN open-Design 15.14.2 Setting the büS/CANopen address (Node ID) Node ID = [DIP 1 · 2 + DIP 2 · 2 + DIP 3 · 2 + DIP 4 · 2 + DIP 5 · 2 + DIP 6 · 2 with DIP x = off = 0 and DIP x = on =1 Table of settings of the büS/CANopen address: Node ID DIP1 DIP2 DIP3 DIP4 DIP5 DIP6 Node ID DIP1 DIP2 DIP3 DIP4 DIP5 DIP6...
Page 98 Control Head Type 8681 büS/CAN open-Design NOTE 1: How to restart the device If the settings are changed by actuating the DIP switches, these changes will not take effect until the device is restarted! For a restart: • trigger a restart command via Bürkert Communicator or • briefly disconnect the control head from the power supply and reconnect or • switch the power supply off/on or • transmit an appropriate reset message.
Page 99: Factory Settings Of The Control Head Regarding The Gateway Configuration
Control Head Type 8681 büS/CAN open-Design NOTE 3: Special characteristics for the DIP switch setting different to DIP1 to DIP6 “000000”, i.e. hardware configured Node ID • Bus mode büS (bueS) or CANopen: The behaviour with this DIP switch setting depends on the bus mode (büS (bueS) or CANopen). The factory setting is büS (bueS). The bus mode can be changed by software only - see chapter “15.20.4 Access to further parameters (cyclic and acyclic)” on page 117.
Page 100: Central Configuration Management (Configuration Client)
Control Head Type 8681 büS/CAN open-Design 15.14.4 Central configuration management (Configuration client) As of firmware B.01.00.00 the central configuration management (e.g. with gateway ME43, as of firmware A.03.02) is supported. This means that defective Bürkert devices can be exchanged easily, almost without configuration effort. To do this, the configuration management for the configuration provider (gateway) in the Bürkert Communicator must be set to “Active” and the “Configuration client” parameter for the configuration device (control head) must be set to mode “Automatically switch on” (= factory setting) or “Active” (Bürkert Communicator: Control Head / General settings / Parameters / Configuration client / Mode). Via a memory card in the ME43 gateway, the last stored device parameters and configurations are retained and can be transferred to the new Bürkert device. When replacing a defective control head, however, the hardware settings (all DIP switches) must be set on the new device before connecting to the network, as they have been set on the device which is to be replaced.
Page 101 Control Head Type 8681 büS/CAN open-Design → Complete the “User name” and “User password” (factory setting for both: “admin”) → Click the “Login” button → Change/overwrite the “Static IP address”, e.g. with “192.168.1.101” or another address, to distinguish the gateways from each other → Confirm by clicking the “Apply” button (If the button “Restart” is clicked, the new “Static IP address” is not saved, only the device will be restarted.) → Click the “OK” button to take over the new “Static IP address” by restarting the device (if “Cancel” is selected, the old “Static IP address” remains active and is only taken over at the next restart) →...
Page 102: Changing The Gateway Ip Address Using "Bürkert Communicator
Control Head Type 8681 büS/CAN open-Design 15.15.2 Changing the gateway IP address using “Bürkert Communicator” → Connect the PC (with Bürkert Communicator Type 8920) via “büS stick” to the büS/CANopen data line (e.g. to a free connection of a CAN junction box in the network - as shown in “Fig. 38: Network principle” on page 85) → Start the Bürkert Communicator Type 8920 → Click on the icon to add a “büS connection” (e.g. “büS COM8”) → Open the desired gateway (e.g. “Gateway_8681”) and select “Industrial communication” and then the “Parameter” tab, then select “Protocol settings”...
Page 103: 15.15.3 Changing The Gateway Ip Address Via Logix Designer
Control Head Type 8681 büS/CAN open-Design 15.15.3 Changing the gateway IP address via Logix Designer → Start the “Logix Designer” → First, select “Go Online” (“Rem Run” = Remote Run) → Right click on “Ethernet” → Select “Gateway 8681 bues ...” → Right click and select “Properties” → A new window opens, go to the “Internet Protocol” tab → Mark “Manually configure IP set- tings” (in the area “Internet Pro- tocol Settings”) →...
Page 104 Control Head Type 8681 büS/CAN open-Design → Then select “Go Offline” → Go to the “General” tab → Overwrite the “Ethernet Address”/ “Private Network” with the new address → Click the “OK” button → Select “Go Online” again → A new window opens → Go to the “Options” tab → Click the “Download” button to load the offline changes of the project into the controller / PLC (continued on next page) english...
Page 105 Control Head Type 8681 büS/CAN open-Design → A new window with several warnings opens → Click the “Download” button to continue the download process english...
Page 106: 15.15.4 Changing The Gateway Ip Address Using Rs Linx
Control Head Type 8681 büS/CAN open-Design 15.15.4 Changing the gateway IP address using RS Linx → Start “RS Linx” → Select “Autobrowse” → Right click on “AB_ETHIP-1, Ethernet” → Select “XXX, Gateway 8681 bueS ...” → Right click on “XXX, Gateway 8681 bueS ...” and select “Module Configuration” → A new window opens, go to the “Port Configuration” tab → In the area “Network Configuration Type”, mark the “Static” option...
Page 107: Registration Of A Gateway Via Logix Designer
Control Head Type 8681 büS/CAN open-Design 15.16 Registration of a gateway via Logix Designer The gateway ME43 must be registered in the Logix Designer database: → Ensure that the EDS file and the ICO file are in the same folder (Do not change the name of the ICO...
Page 108: Installation Of A Gateway Via Logix Designer
Installation of a gateway via Logix Designer Gateway(s) must be added to the Ethernet (I/O Configuration): → Start the “Logix Designer” → First, go “Offline” → Search for “I/O Configuration” and “Ethernet” → Right click on “Ethernet” → Select “New Module” → In the new window “Select Module Type”, select the appropriate device from the “Catalogue”: (use the filter function for a faster search: vendor “Buerkert Werke ...”) → After selecting the “Gateway 8681 bueS”, click on the “Create” button (continued on next page) english...
Page 109 Control Head Type 8681 büS/CAN open-Design → In the new window “New Module”, enter a new significant name in the name field and select the appropriate “Private Network” number for the “Ethernet Address” → Click on “OK” button → Close the (old) window “Select Module Type” → in the new window DOWNLOAD the corresponding files (see chapter “15.10 Gateway” on page 92) onto the PLC → Then “Go Online” to connect the gateway and the master controller / PLC (EtherNet/IP) to each other...
Page 110: Configuration Of The Control Head Network
Control Head Type 8681 büS/CAN open-Design 15.18 Configuration of the control head network The gateway Type ME43 is used as a fieldbus interface between the control heads (Type 8681 büS/CANopen) and the master controller (EtherNet/IP). Each gateway can communicate with up to 63 control heads of Type 8681 büS/CANopen. To set up a network, it is necessary to assign a unique device address to each control head (to do so, use the respective DIP switches - see chapter “15.14.2” on page 97).
Page 111: 15.18.2 "Hide Function" Via "Bürkert Communicator
Control Head Type 8681 büS/CAN open-Design 15.18.2 “Hide function” via “Bürkert Communicator” → Connect the PC (with Bürkert Communicator Type 8920) via “büS stick” to the büS/CANopen data line (e.g. to a free connection of a CAN junction box in the same network - as shown in “Fig. 38: Network principle” on page 85) → Start the Bürkert Communicator Type 8920 → Click on the icon to add an interface (e.g. “büS COM8”) → Open the desired gateway (e.g. “Gateway_8681”) and select “Industrial communication” and then the “Parameter” tab, search for “Hide process values”, then select “Edit hide objects” and start the...
Page 112 Control Head Type 8681 büS/CAN open-Design → “Page 2”: Hiding of the outputs: set the switch to (ON) in order to activate the hiding, i.e. these outputs are hidden then – or set the switch to (OFF) in order NOT to activate the hiding, i.e. these outputs are NOT hidden: → Click on “Next” (or cancel the “hiding process” via button “Cancel”). → “Page 3”: Hiding of the inputs: set the switch to (ON) in order to activate the hiding, i.e. these inputs are hidden then – or set the switch to (OFF) in order NOT to activate the hiding, i.e. these inputs are NOT hidden: :...
Page 113: Description Of The (Cyclical) I/O Data
Control Head Type 8681 büS/CAN open-Design 15.19 Description of the (cyclical) I/O data Depending on the configuration, the gateway processes 1 ... 6 byte of the process data emanating from the control 6 byte head for the position feedback of the position measuring system. Gateway / Process data 1 byte process data regarding the solenoid valve switching 1 byte statuses are processed by the control head.
Page 114: Access To Parameters (Read / Write)
Control Head Type 8681 büS/CAN open-Design 15.20 Access to parameters (Read / Write) Some relevant acyclic parameters have been defined for preconfigured gateways which can be read directly with the Logix Designer and partially overwritten - described below in chapters “15.20.1 Parameter – reading via Logix Designer” and “15.20.2 Parameters – writing via Logix Designer”. The Bürkert Communicator (Type 8920) also makes it easy to read out the parameters and change the values (see “15.20.3 Access to parameters via Bürkert Communicator”...
Page 115 Control Head Type 8681 büS/CAN open-Design T h i s parameter is displayed for all devices: english...
Page 116: 15.20.2 Parameters - Writing Via Logix Designer
Control Head Type 8681 büS/CAN open-Design 15.20.2 Parameters – writing via Logix Designer Parameters in white fields (rw) can be overwritten (parameters in grey fields (ro) can only be read out): → Open the desired gateway as for the reading function and in the “Parameters” tab select e.g. Group: “All Parameters” In order to type in or change a value in a white field: → Type in a value in the white “Value” field, considering the data type as specified under “Style” (if no style is specified, it is a string value, in that case click the symbol to type in). → Press the button “OK or “Enter” to accept the value 15.20.3 Access to parameters via Bürkert Communicator The Bürkert Communicator (Type 8920) makes it easy to read and change parameters. For a detailed description of the Bürkert Communicator - see the relevant manual (see chapter “4.3 Information and instructions on the Internet” on page 14).
Page 117: Access To Further Parameters (Cyclic And Acyclic)
→ A restart is required after a factory reset and in order to activate changes of bus/communication settings. 15.20.4 Access to further parameters (cyclic and acyclic) In addition to the predefined relevant parameters, further values can be read out and partially overwritten. Access is via “Bürkert Communicator” or e.g. via Logix Designer. The required fieldbus addresses (as well as indices / sub-indices) are shown in a Parameter list that cor- responds to the respective gateway configuration. This parameter list and other files can be found on the Bürkert website - enter the respective ID number of the preconfigured gateway as search term and download the required files from the ZIP container under “Downloads” / “Software”. An Object list for CANopen and other required files for the Type 8681 büS/CANopen can be found on the Bürkert website – enter the type “8681” or the ID number of the device as search term and download the cor- responding files after opening the ZIP container with the “Initiation Files”, found under “Downloads” / “Software”. english...
Page 118: Display Of The Status Leds For Bus Error
Control Head Type 8681 büS/CAN open-Design 15.21 Display of the status LEDs for bus error Bus errors are also indicated by the central multi-coloured status display (device status LED / Top LED)- see chapter “21.2 Flashing pattern & fault signalling” and “21.3 Signal priorities”. Bus errors are indicated by the status LEDs on the electronic module as well as by the Top LED. The device status LED (“Module”) and the bus status LED (“Network”) are located on the electronic module of the control head - see figure beside.
Page 119: 15.22 Firmware Updates
Control Head Type 8681 büS/CAN open-Design Device status possible errors Remedy Error • Another device with the same • Check baud rate - it is critical if Node ID is in the same network • Check the Node ID address (if the LED • No bus connection (Gateway / required, correct it so that each is still lit 2 PLC) due to communication address is only available once) minutes after problems or gateway restart the last device • Check the status of the gateway...
Page 120: Accessories For Büs Devices
Control Head Type 8681 Accessories for büS devices ACCESSORIES FOR BÜS DEVICES CAUTION! Risk of injury and/or damage due to the use of unsuitable parts Incorrect accessories and unsuitable spare parts may cause injuries and damage the device and the sur- rounding area.
Page 121 Control Head Type 8681 Accessories for büS devices Accessories Figure Order / ID no. CAN terminating resistor, M12 plug*), 120 Ω 773490 CAN terminating resistor, M12 socket*), 120 Ω 773491 CAN Y-connector, M12*) 773492 CAN T-connector, M12*) 773493 Mounting plate for CAN T-connector (M12) 773494 Protective cap for M12 socket 308778...
Page 122: Cabling Examples (Büs/Canopen)
Control Head Type 8681 Cabling examples (büS/CANopen) CABLING EXAMPLES (BÜS/CANOPEN) english...
Page 123 Control Head Type 8681 Cabling examples (büS/CANopen) english...
Page 124 Control Head Type 8681 Cabling examples (büS/CANopen) english...
Page 125: Connection Of An External Initiator
Control Head Type 8681 Connection of an External Initiator CONNECTION OF AN EXTERNAL INITIATOR DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 126 Control Head Type 8681 Connection of an External Initiator → Assemble the connection cables according to the general rules of technology. → Insert cables through the cable gland (connection on right) into the interior of the housing. → Connect the wires to the connection terminals according to the pin assignment. → Close the housing following the instructions in chapter “8 Opening and Closing the Housing”.
Page 127: Special Designs
Control head for double-acting actuators This design is configured for double-acting actuators. Of the two internal solenoid valves, one is designed for NC mode of operation and the other for NO mode of operation. 19.1.1 Anomalies This variant can be configured for all electrical designs. This control head differs from control head Type 8681 (standard) in the following points: • Solenoid valve 1: NC / Normally Closed; Solenoid valve 2: NO / Normally Open (as a result safety position) • The flow rate from P to A2 may be restricted to 50 l/min only, otherwise a reliable switchover (from A2 to R) cannot be guaranteed! • only automatic Teach function (Autotune) 1 and 2 possible 19.1.2...
Page 128: Control Head (As-I) With 2 External Initiators
Control head (AS-i) with 2 external initiators 19.2.1 Anomalies This variant was configured for the AS interface design. This control head differs from control head Type 8681 (standard, AS-i) in the following points: • Connections for 2 external initiators, which behave like S1 and S2 (Top LED display) • No internal positions can be taught Connection • No automatic Teach function (Autotune) can be...
Page 129: Position Measuring System
Control Head Type 8681 Position Measuring System POSITION MEASURING SYSTEM Operating principle of the position measuring system The position measurement is based on recording the change in position of the ferromagnetic target inside the system. The geometry and the material of the target to be used are synchronized with the sensitivity of the system.
Page 130: Setting The Position Measuring System (Teach Procedure)
Control Head Type 8681 Position Measuring System 20.1 Setting the position measuring system (Teach procedure) DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 131: Teach Buttons / Teach Functions
Control Head Type 8681 Position Measuring System Teach buttons Electronic module 24 V DC Electronic module ASI Fig. 47: Teach buttons on the electronic modules (in the example of the electronic modules for 24 V DC and AS-i) 20.2 Teach buttons / Teach functions 20.2.1...
Page 132: Automatic Teach Functions (Autotune)
The following applies to IO-Link and büS/CANopen devices: *) This optical feedback for “automatic Teach function (Autotune) active” is only valid for the display mode “Device-specific LED mode” (“8681 Classic 0 ... 15”) - see chapter „21.1.1“. With the other display modes of the device status LED (top LED) – see chapter „21.1“ – there are diffe- rences in the colour and flashing pattern display for “automatic Teach function (Autotune) active”.
Page 133: Sequence Of The Automtic Teach Functions (Autotune)
Control Head Type 8681 Position Measuring System If no automatic Teach function (Autotune) has been started 10 s after switching to Autotune mode, the automatic Teach function (Autotune) is exited automatically. If an automatic Teach function (Autotune) does not run properly or is aborted (if e.g. no compressed air is connected), the positions already taught are deleted again, the corresponding automatic Teach function (Autotune function) is left and switched to normal operation. The Teach positions are set to "not taught", i.e. the Top LED flashes in the fault colour. In the case of the design for double-acting actuators (solenoid valves NC+NO) only automatic Teach functions (Autotune) 1 and 2 are possible (compare chapter “19.1” on page 127). 20.2.3 Sequence of the automtic Teach functions (Autotune) Automatic Teach function / Autotune 1: Control Effect on the process valve...
Page 134 Control Head Type 8681 Position Measuring System Automatic Teach function / Autotune 2: Control Effect on the process valve Internal program Error T2 + T3 Autotune mode started Autotune 2 starts Open position Teach Valve closing Activate Wait period Closed position...
Page 135 Control Head Type 8681 Position Measuring System Automatic Teach function / Autotune 4: Control Effect on the process valve Internal program Error T2 + T3 Autotune mode started T1 + T2 Autotune 4 starts Valve closing Activate Wait period Closed position...
Page 136: Led Colour Assignments
DIP switches for setting the colour coding (in the example of the electronic modules büS/CANopen and AS-i) 21.1 Display modi – overview The switching status and position feedback (S1, S2, S3, S4IN) of the process valve described above as well as error and warning messages are displayed differently in the various variants due to the varying design of the top LED. With Type 8681 büS/CANopen and IO-Link, further display modes and colour combinations can be selected, which may differ from the classic variants (24 V DC, 120 V AC, AS-i, DeviceNet) - see “Table 6”. english...
Page 137 “21.1.5” all other combinations: (Top) LED off Table 6: Colour combinations / colour coding / display modes for Type 8681 IO-Link and büS/CANopen (DIP switch settings available for büS/CANopen variant only) Display modes for the IO-Link variant: The display modes and colour coding listed in „Table 6“ can only be set by configuration/parameterisation of the devices, as no DIP switches are available –- see IODD object description (can be downloaded from the...
Page 138: Device Specific Led Mode "8681 Classic Mode
LED Colour Assignments 21.1.1 Device specific LED mode “8681 Classic Mode” This display mode “Device-specific LED mode” “8681 Classic Mode” of the device status LED for position feedback (S1, S2, S3, S4IN) of the process valve corresponds to the optical feedback of the standard or “classic” control heads (variants 24 V DC, 120 V AC, AS-i, DeviceNet). With büS/CANopen devices, the colour combination is set using DIP1 to 4 - i.e. in the same way as with the classic variants.
Page 139: Namur Mode
Control Head Type 8681 LED Colour Assignments The mode of operating of the external initiator (S4/S4IN) can be set for the classic variants by means of a PC service program – to do so, connect the control head to the PC via the service interface and proceed as described in the software manual: “Software manual Type 8681 | PC service program” in chapter “Sub-menu Start-up (general)”. For the IO-Link and büS/CANopen variants, the Bürkert Communicator is recommended for setting the mode of operating of the external initiator (S4/S4IN) (connection to the PC via a büS stick - see chapter “16”...
Page 140: Valve Mode
Control Head Type 8681 LED Colour Assignments 21.1.3 Valve mode The device status LED (Top LED) display the position feedback (S1, S2, S3) of the process valve and the feedback S4IN from the external initiator. There is no display of error and warning messages in this mode. The position feedback is displayed as shown below in “Table 10”. Position Process valve...
Page 141: Valve Mode + Errors
Control Head Type 8681 LED Colour Assignments 21.1.4 Valve mode + Errors The device status LED (Top LED) display the position feedback (S1, S2, S3) of the process valve and the feedback S4IN from the external initiator as well as error messages. The position feedback is displayed as shown below in “Table 11”. If an error (i.e. internal error, bus error, error with manual or automatic Teach function, positions measuring s ys t em signal error) occurs, this is also displayed alternately according to the scheme: 1 second position feedback / 1 second error display.
Page 142: Valve Mode + Errors + Warnings
Control Head Type 8681 LED Colour Assignments 21.1.5 Valve mode + Errors + Warnings The device status LED (Top LED) display the position feedback (S1, S2, S3) of the process valve and the feedback S4IN from the external initiator as well as error and warning messages. The position feedback is displayed as shown in “Table 12” below. If an error or a warning occurs (see colour assignment below following “Table 12”, this is also displayed alternately: 1 second position feedback / 1 second error or warning display.
Page 143: Display Mode "Fixed Colour
Control Head Type 8681 LED Colour Assignments 21.1.6 Display mode “Fixed colour” For IO-Link devices: The information required for configuration can be found in the IODD object description under object “LED modi” (0x2120). For büS/CANopen devices: In this operation mode there is no feedback on process valve positions or error/warning displays. A fixed colour can be assigned to the device. However, this is possible only in software configurable display mode (for büS/CANopen devices: DIP1 to 6: 111110) – compare “Table 6” on page 137. Configuration/parametrisation (for example via Bürkert Communicator) can be used to select the following colours: white, green, blue, yellow, orange, red, teal, pink (factory settings: (top) LED off).
Page 144: Feedback In Case Of Errors / Warnings
Control Head Type 8681 LED Colour Assignments 21.2.2 Feedback in case of errors / warnings If the position feedback in normal operation and error/warning displays occur at the same time, these are not displayed at all for some display modes or alternately for other display modes – as shown in the fol- lowing “Table 14”...
Page 145 Control Head Type 8681 LED Colour Assignments Display of device status / errors / warnings Flashing pattern / colour (for reasons of space the “colour of the valve posi- tion” is designated as Note position colour) 3 x flashing: Teach confirmation in position colour (after successful teaching: colour for...
Page 146 Control Head Type 8681 LED Colour Assignments Flashing pattern / colour (for reasons of space the “colour of the valve posi- tion” is designated as Note position colour) Continuous flashing: sec. sec. Service/maintenance notification (maintenance / service required) in error or blue colour (in error colour for the classic designs (24 V, 120 V, AS-i, DeviceNet), (position feedback in blue colour for büS/CANopen and...
Page 147: Localisation Function
Control Head Type 8681 LED Colour Assignments 21.2.3 Localisation function For IO-Link and büS/CANopen devices only: This function can be used to locate a device in the system via the controller or via the Bürkert Communicator. However, the localisation function must be activated – see the respective device description file IODD (“Process output data”) or EDS (“Locating Function” 0x2101). The device status LED (top LED) then starts to “flash” according to signal priority (see chapter “21.3”) according to the following logic: see “Table 16”. In NAMUR mode, the device status “single flashing” is displayed. With display modes “VM+F” and “VM+F+W”, any error or warning messages that may occur are displayed in the corresponding colour “single flashing” alternating with the corresponding position feedback (S1, S2,...
Page 148: Signal Priorities
When several statuses overlap for one valve For the classic variants (24 V DC, 120 V AC, AS-i, DeviceNet) and the “Device-specific display mode 8681 Classic X” of the IO-Link and büS/CANopen variants, the the following priority list applies: 1. Internal error 2. Manual operating mode is active, e.g. by magnetic manual override - see chapter “22 Service Mode / Manual override” on page 151...
Page 149 Control Head Type 8681 LED Colour Assignments With the classic variants (24 V DC, 120 V AC, AS-i, DeviceNet), the setting can be changed by a service technician, if necessary. The parameter values and the assigned display priority are listed in “Table 18”. Parameter (highest) priority 1 Priority 2 Priority 3 (lowest) priority 4 “PRIO” 24 *) particular logic, see “Table 19”...
Page 150 Control Head Type 8681 LED Colour Assignments S4IN” (0x2C04 / 0xA). With the classic variants (24 V DC, 120 V AC, AS-i, DeviceNet), this setting can be changed using the PC service program. For further details about S4 - see section “General notes on S4 (using an external initiator)” in chapter “21.1.1” on page 138 Special case: “PRIO 25” Optical feedback: Display Position feedback of the Top LED...
Page 151: Service Mode / Manual Override
Control Head Type 8681 Service Mode / Manual override SERVICE MODE / MANUAL OVERRIDE By default, the control head provides the following (e.g. for service purposes): • a magnetic manual override which is easily accessible from the outside for solenoid valve 1 (2/A1) well as • a mechanical manual override accessible when the hood is open on each equipped solenoid valve – see chapter “22.2 Mechanical manual override”. 22.1 Magnetic manual override Markings for magnetic manual override...
Page 152: Mechanical Manual Override
Control Head Type 8681 Service Mode / Manual override The activation of the manual override or errors when using the manual override are signaled by device status LED / Top LED in the fault colour - see chapter “21.2 Flashing pattern & fault signalling” on page 143 or “Table 15” on page 146 Procedure for activating &...
Page 153: Maintenance, Troubleshooting
Control Head Type 8681 Maintenance, troubleshooting MAINTENANCE, TROUBLESHOOTING 23.1 Safety instructions DANGER! Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)! ` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-...
Page 154: Safety Positions
Control Head Type 8681 Maintenance, troubleshooting 23.2 Safety positions Safety positions of the solenoid valves after failure of the electrical or pneumatic auxiliary power: Safety positions after failure of the auxiliary power Process valve Operating mode design electrical pneumatic single-acting...
Page 155: Maintenance / Service
Control Head Type 8681 Maintenance, troubleshooting 23.3 Maintenance / service When used properly, the control head Type 8681 operates maintenance and trouble-free. For service work, contact the Bürkert Sales Center (chapter “4.1” on page 14 ). If the service/maintenance notification function is active (see chapter “6.8 Factory settings in the firmware”), a maintenance prompt is issued - the corresponding "flashing pattern" depends on the design of the control head Type 8681 - see chapter “21.2 Flashing pattern & fault signalling” on page 143. 23.4 Cleaning NOTE! Aggressive cleaning agents may damage the material! • In the potentially explosive atmosphere, only wipe the control head with a damp or anti-static cloth to avoid electro-static charges.
Page 156 Control Head Type 8681 Maintenance, troubleshooting Fault description Possible cause of the fault Troubleshooting Feedback signal is "lost" in Position in the limit range of the Repeat the Teach procedure system operation feedback field (see chapter “20.1 Setting the position measuring system (Teach procedure)”) “6.8.1 Feedback fields (position Check the process valve end positions measuring system)” on page 28...
Page 157: Replacement Of Components And Modules
Control Head Type 8681 Replacement of Components and Modules REPLACEMENT OF COMPONENTS AND MODULES If components or modules need to be replaced for maintenance or service reasons, please observe the fol- lowing notes and descriptions. Devices that are used in the potentially explosive atmosphere may only be repaired by the manufacturer! 24.1...
Page 158: Changing The Electronic Module
Control Head Type 8681 Replacement of Components and Modules 24.2 Changing the electronic module NOTE! Electrostatic sensitive components/modules! • The device contains electronic components which react sensitively to electrostatic discharge (ESD). Contact with electrostatically charged persons or objects may be hazardous to these components. In the worst case scenario, they will be destroyed immediately or will fail after start-up.
Page 159: Changing The Valves
Control Head Type 8681 Replacement of Components and Modules Installation procedure: → Carefully insert the entire electronic module into the recess in the lower housing part. → Plug the electronic module carefully onto the contact pins for the position measuring system.
Page 160: Changing The Position Measuring System
Control Head Type 8681 Replacement of Components and Modules Procedure: → Open the housing following the instructions in chapter “8 Opening and Closing the Housing”. → If necessary, mark the electrical connections to ensure correct assignment during reinstallation. → Loosen the electrical connections. → Loosen the connecting screws (Torx T10) for the corresponding valve module.
Page 161 Control Head Type 8681 Replacement of Components and Modules WARNING! Risk of injury from high pressure! ` Before loosening lines and valves, turn off the pressure and vent the lines. NOTE! Electrostatic sensitive components/modules! • Before changing the position measuring system, switch the electrical power for the control head off so that destruction of the PCB and electronic module is avoided. • The device contains electronic components which react sensitively to electrostatic discharge (ESD). Contact with electrostatically charged persons or objects may be hazardous to these components. In the worst case scenario, they will be destroyed immediately or will fail after start-up.
Page 162 Control Head Type 8681 Replacement of Components and Modules → Tilt the electronics forwards to loosen the position measuring system's contact pins from the electronic module. → Bend the snap-fit hooks on the bottom end of the position measuring system inwards. In some cases, break them off. → Pull the position measuring system upwards out of the guide.
Page 163: Shutdown
Risk of injury due to improper disassembly! ` Disassembly work may be carried out by trained technicians only and with the appropriate tools! 25.2 Dismantling the control head Type 8681 Prior to starting with the work, check the system status! Procedure for variants with cable gland: →...
Page 164: Packaging And Transport
Control Head Type 8681 Packaging and Transport PACKAGING AND TRANSPORT NOTE! Transport damage! Inadequately protected devices may be damaged during transportation. ` During transportation protect the device against moisture and dirt in shock-resistant packaging. ` Avoid the effects of heat and cold which could result in temperatures above or below the permitted stor- age temperature. Approved non-return and reusable transport containers are used for the transport ex factory and storage of the control head.
Page 165 Control Head Type 8681 english...
Page 166 www.burkert.com...

Burkert 8681 Operating Instructions Manual

1 Operating Instructions

2 Authorised Use

3 Basic Safety Instructions

4 General Information

5 System Description

6 Technical Data

7 Assembly

8 Opening and Closing the Housing

9 Pneumatic Installation

600 DC - Design

11 Ac - Design

12 As Interface - Design

13 Devicenet - Design

14 Io-Link - Design

15 Büs/Can Open-Design

16 Accessories for Büs Devices

17 Cabling Examples (Büs/Canopen)

18 Connection of an External Initiator

19 Special Designs

20 Position Measuring System

21 Led Colour Assignments

22 Service Mode / Manual Override

23 Maintenance, Troubleshooting

24 Replacement of Components and Modules

25 Shutdown

26 Packaging and Transport

27 Storage

28 Disposal

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Summary of Contents for Burkert 8681