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Summary of Contents for Burkert 3281
- Page 1 Type 3281 Motor valve Motorventil Vanne motorisée Operating Instructions Bedienungsanleitung Manuel d‘utilisation...
- Page 2 We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous réserve de modifications techniques. © Bürkert Werke GmbH & Co. KG, 2022 Operating Instructions 2207/00_EU-ML_00815152 / Original DE...
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Page 3: Table Of Contents
Type 3281 ontents OPERATING INSTRUCTIONS ........................6 Symbols ............................6 1.2 Definition of terms ........................6 INTENDED USE ............................7 BASIC SAFETY INSTRUCTIONS ......................8 GENERAL NOTES...........................9 4.1 Contact addresses ........................9 4.2 Warranty ............................9 4.3 Information on the Internet ......................9 PRODUCT DESCRIPTION ........................10 5.1 Intended area of application ......................10 5.2 Structure and function .......................10 5.2.1 Functions of the control electronics ................10 5.3... - Page 4 Type 3281 7.3 Installing valve body ........................18 7.4 Installing devices with welded connection ................19 7.4.1 Removing actuator from the valve body ..............19 7.4.2 Installing actuator on valve body ................19 7.5 Turning actuator .........................20 7.6 Installing the device electrically ....................21 7.6.1 Pin assignment of the pins for positioner ..............22 7.6.2 Pin assignment of the pins for process controller ............23 7.7...
- Page 5 Type 3281 8.6 Process Controller Settings .......................35 8.6.1 PV.SCALE/SP.SCALE - Scaling the process controller ..........35 8.6.2 P.LIN - Linearisation of the process characteristic .............35 8.6.3 P.TUNE - Self-optimisation of the process controller ..........35 8.6.4 P.CONTROL - Parameterisation of the process controller .........35 8.6.5...
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Page 6: Operating Instructions
Type 3281 Operating instructions OPERATING INSTRUCTIONS The operating instructions describe the entire life cycle of the device. Keep these instructions ready to hand at the operating site. Important safety information. ▶ Read these instructions carefully. ▶ Above all, observe the safety instructions, intended use and operating conditions. -
Page 7: Intended Use
Type 3281 Intended use INTENDED USE The 2-way motor valve Type 3281 is designed to control the flow of liquid and gaseous media. ▶ Use the device only as intended. Non-intended use of the device may be dangerous to people, nearby equipment and the environment. ▶ Do not use the device outdoors. ▶ Do not expose the valve to direct sunlight. -
Page 8: Basic Safety Instructions
Type 3281 Basic safety instructions BASIC SAFETY INSTRUCTIONS These safety instructions do not take into account any unforeseen circumstances and events which occur during installation, operation and maintenance. The operator is responsible for observing the location-spe- cific safety regulations, also with reference to personnel. Risk of injury due to high pressure and escaping medium. ▶ Switch off the pressure before working on the system or device. Vent or empty the lines. -
Page 9: General Notes
Type 3281 General notes GENERAL NOTES Contact addresses Germany Bürkert Fluid Control Systems Sales Centre Christian-Bürkert-Str. 13–17 D-74653 Ingelfingen Tel. +49 (0) 7940 - 10 91 111 Fax +49 (0) 7940 - 10 91 448 Email: info@burkert.com International The contact addresses can be found on the back pages of the printed operating instructions. Also on the Internet at: www.burkert.com... -
Page 10: Product Description
Type 3281 Product description PRODUCT DESCRIPTION Intended area of application The motor valve Type 3281 is designed to control the flow of liquid and gaseous media. Only clean, liquid or gaseous media that do not attack the valve body and seal materials may be controlled. NOTE Damage to the valve body and seals due to unsuitable media. Unsuitable media can cause damage to the valve body and seals. ▶ Use only suitable media. -
Page 11: Variants
Type 3281 Product description - When the voltage is applied again, the control electronics automatically detect the current position. • Reduction of energy consumption. - The stepper motor is only supplied with energy when it opens or closes the valve further. Owing to the internal holding torque, the stepper motor only moves when it is controlled. -
Page 12: Process Controller
Type 3281 Product description 5.3.2 Process controller The additionally implemented PID controller can, except for the position control, also be used to conduct a process control for purposes of cascade control. CTRL Valve opening Set-point Positioner Electromotive Continuous valve position... -
Page 13: Technical Data
Type 3281 Technical Data TECHNICAL DATA Conformity The Type 3281 conforms to the EU directives according to the EU declaration of conformity (if applicable). Standards The standards applied to demonstrate conformity with the Directives can be found in the EU type examination certificate and/or the EU declaration of conformity (if applicable). Operating conditions WARNING Risk of injury due to malfunction if used outdoors. ▶ Do not use the device outdoors and keep it away from heat sources that could cause the permissible temperature range to be exceeded. -
Page 14: Type Label
Type label Seat diameter Electronic variant of Seal material the valve Body material Type 3281 X DN10 PTFE VA Port connection, pressure range G 3/8 PN 6 bar 24 V DC 20 W Voltage, max. power consumption Tamb see manual... - Page 15 Type 3281 Technical Data Positioner Process controller Electrical data Analog Digital (fieldbus) Analog Digital (fieldbus) Analogue input (actual value 0...20 mA, 0...20 mA, input) 4...20 mA, 4...20 mA, 0...5 V or 0...5 V, 0...10 V, see 0...10 V or frequency: chapter "8.2.1" Measuring range 5...2000 Hz Input resistance > 22 kΩ Input signal > 10 Vss signal form square wave Input impedance for analogue 60 Ω at...
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Page 16: Derating
Type 3281 Technical Data 6.6.1 Derating The maximum duty cycle of the valve depends on the maximum ambient temperatures, the media temperature and the coil current of the stepper motor. The duty cycle does not mean the duty cycle of the device but the duty cycle of the stepper motor. -
Page 17: Installation
Type 3281 Installation INSTALLATION DANGER Risk of injury due to high pressure in the system or device. ▶ Before working on the system or device, switch off the pressure and deaerate lines. Risk of injury from electric shock. ▶ Before working on the system or device, switch off the power supply and secure to prevent reactivation. ▶ Observe any applicable accident prevention regulations and safety regulations for electrical devices. WARNING Risk of injury due to improper installation. ▶ Installation may only be performed by trained technical personnel with suitable tools. ▶ Secure the system against unintentional activation. -
Page 18: Installing Valve Body
Type 3281 Installation When mounting the valve seat, the actuator must be removed. The work steps required are described in chapter “7.4.1”. → Screw suitable tool insert into the assembly tool. The suitable assembly tool (order number 625604) is not included in the valve set and must be ordered separately. -
Page 19: Installing Devices With Welded Connection
Type 3281 Installation Installing devices with welded connection NOTE Damage to the actuator when welding the valve body into the pipeline. ▶ Before welding into the pipeline, remove the actuator. 7.4.1 Removing actuator from the valve body NOTE Damage to the valve seat seal or seat contour. ▶ When removing the actuator, the valve must be in the open position. -
Page 20: Turning Actuator
Type 3281 Installation DANGER Danger due to lubricant. Lubricant may contaminate the medium. There is a risk of explosion in oxygen applications. ▶ For specific applications use only approved lubricants (e.g. for oxygen applications or analysis applications). → Before re-installation, grease the thread of the body connection (e.g. with Klüberpaste UH1 96-402 from Klüber). NOTE Damage to the valve seat seal or seat contour. ▶ When installing the actuator, the valve must be in the open position. -
Page 21: Installing The Device Electrically
Type 3281 Installation Installing the device electrically All electrical inputs and outputs of the device are not galvanically isolated to the supply voltage. DANGER Risk of injury from electric shock. ▶ Before working on the system or device, switch off the power supply and secure to prevent reactivation. ▶ Observe any applicable accident prevention regulations and safety regulations for electrical devices. -
Page 22: Pin Assignment Of The Pins For Positioner
Type 3281 Installation The threaded sleeve of the M12 circular plug is connected to the actuator cover. The actuator cover must be connected to a suitable earthing connection. NOTE To ensure electromagnetic compatibility (EMC), make sure that the cable is as short as possible and the cross-section is as large as possible. -
Page 23: Pin Assignment Of The Pins For Process Controller
Type 3281 Installation 7.6.2 Pin assignment of the pins for process controller 7.6.2.1 Analogue variant, circular plug M12, 8-pin Wire colour* Pin assignment External circuit white Supply + 24 V DC ±10%, max. Residual ripple 10% brown Supply GND 24 V DC GND green CAN low CAN low yellow CAN high... -
Page 24: Led Display
Type 3281 Installation 7.6.2.3 Digital variant, circular plug M12, 5-pin Wire Pin assignment External circuit colour Shielding Supply + 24 V DC ±10%, max. Residual ripple 10% black white CAN high CAN high blue CAN low CAN low *ThespecifiedwirecoloursrelatetothebüScable,whichisavailableasanaccessory 7.6.2.4 Digital variant, socket M12, 5-pin... -
Page 25: Display Elements Namur Ne 107
1 or 5 flashing Use to identify a device in the büS network. “Flashing” status starts when selecting the device in the Burkert Communicator software orange perma- Function check Work is being carried out on the device, which means... -
Page 26: Start-Up
Type 3281 Start-up START-UP WARNING Risk of injury from improper operation. ▶ The operating personnel must know and understand the contents of the operating instructions. ▶ Only adequately trained personnel may operate the system and the device. ▶ Perform fluidic and electrical installation before start-up. Start-up with Bürkert Communicator The Bürkert Communicator software can be downloaded free of charge from the Bürkert website. In addition to the software, the USB-büS-interface, available as an accessory, is required. -
Page 27: Connecting The Device To The Bürkert Communicator
Type 3281 Start-up Connecting the device to the Bürkert Communicator The Bürkert Communicator can be connected to the device via a büS network or with the büS interface set. → Install the Bürkert Communicator on the PC. → Use the USB-büS-interface to establish the connection between the device and the PC. -
Page 28: Functions For Process Controllers
Type 3281 Start-up 8.3.2 Functions for process controllers Function Description Physical scaling of the mea- Function for scaling process actual value and process set-point value sured quantity Process Controller Optimisation Function to optimise the process controller parameters Process Characteristic Function for linearisation of process characteristics... -
Page 29: Base Settings
Type 3281 Start-up Base settings The Bürkert Communicator software enables communication with the Type 3281. Operating instructions for Bürkert Communicator can be found under www.burkert.com A commissioning assistant that provides step-by-step guidance through the base settings is available for the Bürkert Communicator: → → commissioning assistant. Configuration area positioner Before delivery, important base settings have already been input at the factory. The commissioning assistant contains functions that are shown in the following tables. -
Page 30: Process Controller
Type 3281 Start-up 8.4.1.1 Set end position After setting the lower end position Valve stroke absolute Valve stroke relative (100 %) The smallest possible Lower end position adjustable flow rate range CUTOFF_min-Function Fig. 13: Flow rate characteristics The lower end position can be set automatically to a factory predefined position after the X-TUNE or man- ually with a flow sensor. The lower end position defines the lowest possible adjustable flow rate at the valve. To counteract thermal effects, the lower end position of the valve must be set in the range marked in the illustration. The CUTOFF_min function of the valve (see chapter “8.5.8 CUTOFF”) nevertheless ensures sealing. -
Page 31: Settings For Positioners And Process Controllers
Type 3281 Start-up Settings for positioners and process controllers 8.5.1 INPUT/OUTPUT - selected standard signal Under this menu option, enter the signal used for the set-point value or actual value. - Current 4...20 mA (for digital variant only actual value) - Current 0...20 mA (for digital variant only actual value) - Voltage 0...10 V (for digital variant only actual value) - Voltage 0...5 V for digital variant only actual value) - CANopen/büS (only for digital variant) - Frequency (only for digital variant) 8.5.2... -
Page 32: X.time - Limitation Of Control Speed
Type 3281 Start-up 8.5.4 X.TIME - limitation of control speed If the actuator speed is to be limited, smaller actuator speeds can be entered. The following settings are possible via the Bürkert Communicator: Operating mode Max. control speed [sec.] Slow 2 Slow 1 Normal Faster 8.5.5 DIR.CMD -Effective direction of the positioner set-point value... -
Page 33: X.limit - Limitation Of The Mechanical Valve Adjustment Range
Type 3281 Start-up 8.5.7 X.LIMIT - Limitation of the mechanical valve adjustment range This function limits the (physical) control range to predetermined % values (bottom and top). The valve adjustment range of the limited adjustment range is set equal to 100%. If the limited valve control range is left during operation, negative actual positions or actual positions greater than 100% are displayed. -
Page 34: Charact - Selection Of The Transfer Characteristic Between Input Signal
Type 3281 Start-up 8.5.9 CHARACT - Selection of the transfer characteristic between input signal (set-point position) and stroke (correction characteristic) With this auxiliary function, you select a transfer characteristic with regard to set-point value (set-point position, CMD)and valve position (POS) for correcting the flow or operating characteristic. -
Page 35: Process Controller Settings
Type 3281 Start-up Process Controller Settings 8.6.1 PV.SCALE/SP.SCALE - Scaling the process controller The function defines the following settings: • Unit of process actual value • Position of the decimal point • Values for the lower and upper process actual value • Lower and upper process set-point value Scaling example for the 4...20 mA input process actual value from the transmitter: 4...20 mA corresponds to... -
Page 36: P.sim - Simulation Of The Process
Type 3281 Start-up • Reset time of the process controller. The reset time determines the I part of the PID controller. • Derivative time of the process controller. The derivative time determines the D part of the PID controller. • Filtering of the process actual value input. The filter of the input signal has a low-pass behavior and can be set in several stages. Adjustment of the filter effect Setting Corresponds to cut-off fre- Effect quency (Hz) minimum filter effect 0.07 0.05 0.03 greatest filter effect 8.6.5 P.SIM - Simulation of the process With this function, the process can be simulated. -
Page 37: Other Settings
Type 3281 Start-up Other settings 8.7.1 CAL INP Calibration of the set-point position (4...20 mA; 0...20 mA; 0...5 V; 0...10 V) This auxiliary function can be used to recalibrate the set-point input. Adoption of the minimum input signal (0 mA; 4 mA; 0 V): Create the minimum value of the standard signal at the input and confirm it in the software. Adoption of the maximum input signal (20 mA; 5 V; 10 V): Set the maximum value of the standard signal at the input and confirm it in the software. Calibration of the actual position (4...20 mA; 0...20 mA; 0...5 V; 0...10 V) This auxiliary function can be used to recalibrate the actual input. -
Page 38: Changing The Operating State
Type 3281 Start-up User level Icon Description PIN required: Manufacturer-set code 005678 Advanced user Rights: Reading values, limited right to change values. PIN required. Manufacturer-set code 001946 Installer Rights: reading values, expanded right to change values. PIN required. Bürkert Only for Bürkert employees 8.7.7... -
Page 39: Maintenance
Type 3281 Maintenance MAINTENANCE WARNING Risk of injury if maintenance work is not carried out correctly. ▶ Maintenance may only be carried out by trained specialists using suitable tools. ▶ Secure the system against unintentional activation. Maintenance work The device operates maintenance-free under normal conditions. Cleaning Clean the Type 3281 with the usual cleaning agents. Do not use alkaline cleaners, as they have damaging effects on the materials used. Troubleshooting Check in case of faults: •... - Page 40 Type 3281 Maintenance LED is red and The residual ripple of the supply voltage is Use power supply with smooth output flashes / LED is too high. voltage at the required power lit red After eliminating the error to clear the red flashing LED, restart the device (dis- connect from power supply) Temperature too high Observe the max.
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Page 41: Accessories
Type 3281 Accessories ACCESSORIES NOTE Property damage due to incorrect parts. Incorrect accessories and unsuitable spare parts may cause damage to the device. ▶ Use only original accessories and original spare parts from Bürkert. Accessories Order number USB-büS-Interface set 1 00772426 (including power supply unit, büS stick, terminating resistor, Y-distributor, 0.7 m cable with M12 plug) USB-büS-Interface set 2 00772551 (including büS stick, terminating resistor, Y-distributor, 0.7 m cable with M12 plug) -
Page 42: Packaging, Transport
Type 3281 Packaging, transport PACKAGING, TRANSPORT NOTE Transport damage. Inadequately protected devices may be damaged during transport. ▶ Protect the device against moisture and dirt in shock-resistant packaging during transportation. ▶ Avoid exceeding or dropping below the permitted storage temperature. ▶ Protect electrical interfaces from damage with protective caps.
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