Xylem DIQ/S 281 Operating Manual
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Xylem DIQ/S 281 Operating Manual

Xylem DIQ/S 281 Operating Manual

Universal transmitter for one digital sensor
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D I Q
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1
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DIQ/S 281
UNIVERSAL TRANSMITTER FOR ONE DIGITAL SENSOR
OPERATING MANUAL
ba76226e02 03/2023

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Summary of Contents for Xylem DIQ/S 281

  • Page 1 OPERATING MANUAL ba76226e02 03/2023 D I Q IV ER L TR IT TE DIQ/S 281 UNIVERSAL TRANSMITTER FOR ONE DIGITAL SENSOR...
  • Page 2 IQ S System 281 ENSOR For the most recent version of the manual, please visit www.ysi.com. Contact 1725 Brannum Lane Yellow Springs, OH 45387 USA Tel: +1 937-767-7241 800-765-4974 Email: info@ysi.com Internet: www.ysi.com © 2022 Xylem Inc. Copyright ba76226e02 03/2023...

  • Page 3: Table Of Contents

    1.2.2 Fieldbus interface (DIQ/S 281-MOD) ........10 Behavior of the system to a power failure .
  • Page 4 4.11 Software-Update for the DIQ/S 281 and sensors ....... 78...
  • Page 5 Outputs of the DIQ/S 281 ........
  • Page 6 9.4.2 DIQ/S 281 with an additional component (stack mounting) ....139 10 Accessories and options ..........140 11 Messages .

  • Page 7: Overview

    Each sensor is automatically recognized after being connected and immediately starts measuring. Suitable sensors for the universal transmitter DIQ/S 281 are listed in the YSI catalog or on the Internet. For connection to existing process control systems, the universal transmitter...
  • Page 8 Only for the variant DIQ/S 281-MOD For details, see operating manual "Field bus linking" Compressed air- The universal transmitter DIQ/S 281 is prepared for the compressed air-driven, driven cleaning time-controlled sensor cleaning function. For this, a DIQ/CHV valve module and system if necessary a CH cleaning head is required (both available as accessories).

  • Page 9: Interfaces

    1-1 Simple systems with one sensor Interfaces 1.2.1 USB interface The USB interface of the DIQ/S 281 provides the following functions:  Connection of a USB memory device to carry out a software update (see section 4.11)  Connection of a USB memory device to be used as an electronic key for sim- ple access to the system when access control is switched on (see section 5.3.3)

  • Page 10: Fieldbus Interface (Diq/S 281-Mod)

    USB device. When the USB connection is open, there is a danger of corrosion. 1.2.2 Fieldbus interface (DIQ/S 281-MOD) The following variants of the DIQ/S 281 have a fieldbus interface: DIQ/S 281 variant Fieldbus connection DIQ/S 281-MOD...

  • Page 11: Safety

    DIQ/S 281 Safety Safety Safety information 2.1.1 Safety information in the operating manual This operating manual provides important information on the safe operation of the product. Read this operating manual thoroughly and make yourself familiar with the product before putting it into operation or working with it. The operating manual must be kept in the vicinity of the product so you can always find the information you need.

  • Page 12: Safe Operation

    Safe operation 2.2.1 Authorized use The authorized use of the DIQ/S 281 Universal Transmitter consists of its use in online analysis. Only the operation and running of the sensor according to the instructions and technical specifications given in this operating manual is autho- rized (see chapter 9 T ).

  • Page 13: Installation

    Installation Installation Scopes of delivery The following parts are included in the scope of delivery:  Universal transmitter DIQ/S 281  Accessory kit with: – Contact carrier with screws – ISO cap nuts with screws and ring washers – Cable glands with sealing gaskets ...

  • Page 14: Installation Guidelines For Lightning Protection

    – IEC 60332-1-2 (outside the USA, Canada) Installation guidelines for lightning protection During the use of the DIQ/S 281 universal transmitter, particularly in outdoor areas, adequate protection against (electrical) surges must be provided. A surge is a summation phenomenon of surge voltage and surge current. It is generated through the indirect effect of a lightning event or switching operation in the mains, in the grounding system and in information technology lines.
  • Page 15 MIQ module and promote the dissipa- tion of the surge via the mounting construction. 5 The line voltage for the supply of the DIQ/S 281 must comply with overvolt- age category II. Generally this is ensured through the public operator of the power supply networks.

  • Page 16: Connecting System Components

    Installation DIQ/S 281 arresters. Connecting system components 3.5.1 General information The connection of the system components is described in the fol- lowing sections exclusively with examples of the connection of MIQ modules. These descriptions similarly apply to system components that are not mentioned separately in the examples (e.g.

  • Page 17: Stacked Mounting Of Diq And Miq Modules

    DIQ/S 281 Installation 3.5.2 Stacked mounting of DIQ and MIQ modules For optimum stability, a maximum of three modules (DIQ/MIQ) can be mounted in any one stack. Only one MIQ power supply module may be mounted per module stack. Mounting direction MIQ modules can be stacked on top of one another from both sides.
  • Page 18 Installation DIQ/S 281 Variant 1: Stack expansion forwards Preparing the stack mounting t a p t f e e lm r n e t a g u f k n t ie n t a le b t a c...
  • Page 19 DIQ/S 281 Installation Mounting the contact base figure 3-2 Mounting the contact base (variant 1) Contact base Tapping screws Countersunk screws Only IQ Sensor Net products may be used in the IQ Sensor Net. Attach the contact base (pos. 5 in figure 3-2) on the front MIQ module with the two plastic tapping screws (pos.
  • Page 20 Installation DIQ/S 281 Premounting the ISO blind nuts figure 3-3 Mounting the contact base (variant 1) Cheese-head screws ISO blind nuts Insert the cheese-head screws (pos. 8 in figure 3-2) with the plastic washers in the drilled mounting holes in the enclosure and loosely screw in the ISO blind nuts (pos.
  • Page 21 DIQ/S 281 Installation Attach the prepared MIQ module to the lid of the back MIQ module. At the same time, ensure that the two clips on the front MIQ module click into place in the lid of the back MIQ module. Subsequently, tighten the two screws (pos.
  • Page 22 Installation DIQ/S 281 Variant 2: stack expansion backwards Preparing the stack mounting t a p t f e e lm r n e t a g u f k n t ie n t a le b t a c...
  • Page 23 DIQ/S 281 Installation Mounting the contact base figure 3-7 Mounting the contact base (variant 2) Contact base Tapping screws Only use the plastic tapping screws supplied for attaching the con- tact base. They ensure the correct fit. Attach the contact base (pos. 6 in figure 3-7) on the front MIQ module with the two plastic tapping screws (pos.
  • Page 24 Installation DIQ/S 281 Premounting the ISO blind nuts figure 3-8 Premounting the ISO blind nuts (variant 2) Cheese-head screws ISO blind nuts Insert the cheese-head screws (pos. 8 in figure 3-8) with the plastic washers in the drilled mounting holes in the module lid and loosely screw in the ISO blind nuts (pos.
  • Page 25 DIQ/S 281 Installation Stacking the MIQ modules figure 3-9 Stacking the MIQ modules (variant 2) Attach the prepared MIQ module to the back of the front MIQ module. At the same time, ensure that the two clips on the front MIQ module click into place in the lid of the back MIQ module.

  • Page 26: Distributed Mounting Of Miq Modules

    Installation DIQ/S 281 figure 3-10 Closing the enclosure (variant 2) Countersunk screws Close the back MIQ module and fix it with the two countersunk screws (pos. 5 in figure 3-10). 3.5.3 Distributed mounting of MIQ modules General The following IQ S...
  • Page 27 DIQ/S 281 Installation Materials required  1 x SNCIQ or SNCIQ/UG connection cable (see chapter 10 A CCESSORIES AND OPTIONS  Wire end sleeves for 0.75 mm wire cross-section with matching crimping tool  1 x cable gland with seal (scope of delivery of MIQ module).
  • Page 28 Installation DIQ/S 281 Connecting the The SNCIQ and SNCIQ/UG cables are connected to the terminal strip in the cables same way as the SACIQ sensor connection cable (see section 3.5.4): Open the module (DIQ, MIQ). Select any SENSORNET connection. At the same time, look out for the SENSORNET designation.

  • Page 29: Connecting The Sensor

    (for details, see the operating manual of the flexible conduit adapter CC-Box). 3.5.4 Connecting the sensor The sensor is connected to the SENSORNET connector of the DIQ/S 281. General Lines must always be installed separately at a minimum distance of 20 cm from installation other lines that carry a voltage greater than 60 V.

  • Page 30: Iq Sensor With Snciq Cable

    The sensor cable may only be connected to the SENSORNET connector. No wire of the cable may be connected with an external electrical potential. Other- wise, malfunctions could occur. On the left-hand side of the DIQ/S 281, remove the two countersunk screws and open the enclosure. SENSORNET...

  • Page 31: Iq Sensor With Permanently Mounted Cable

    The sensor cable may only be connected to the SENSORNET connector. No wire of the cable may be connected with an external electrical potential. Other- wise, malfunctions could occur. On the left-hand side of the DIQ/S 281, remove the two countersunk screws and open the enclosure. ba76226e02...
  • Page 32 Installation DIQ/S 281 SENSORNET SENSORNET 1 Sensor figure 3-16 Connecting the cable (example DIQ/S 281CR2) Screw the cable gland (pos. 1 in figure 3-16) with the sealing (pos. 2) into the housing at the mounting position for the SENSORNET connection (see label on the bottom of the housing) Loosen the cap nut (pos.

  • Page 33: On-Site Mounting Of The Diq/S 281

    (immersion depth, etc.). On-site mounting of the DIQ/S 281 3.6.1 General information The universal transmitter DIQ/S 281 is designed for stationary installation. With the aid of mounting accessories, the setup can be adjusted to meet various requirements. NOTE Components installed outside must always be protected by a sun shield against the effects of the weather (snow, ice and direct solar radiation).

  • Page 34: Mounting On A Mounting Stand With The Ssh/Iq Sun Shield

    138 mm x 138 mm. The panel may not be thicker than 10 mm (section 3.6.5). To mount the interface (-MOD) of the DIQ/S 281-MOD behind the switch panel, use the PMS/IQ-X accessory (see section 10).
  • Page 35 DIQ/S 281 Installation Mounting the sun shield on a mounting stand figure 3-18 Mounting the SSH/IQ sun shield on a mounting stand Screw the sun shield (pos. 1 in figure 3-18) with the four hexsocket head screws (pos. 2), the washers (pos. 3) and the clamps (pos. 4) at the required height on the mounting stand from the back.

  • Page 36: Mounting Under The Sd/K 170 Sun Shield

    S 281 on the sun shield SSH/IQ figure 3-20 Mounting the DIQ/S 281 on the sun shield Position the universal transmitter on the sun shield and fix it into place with the two screws (pos. 2 in figure 3-20). Close the lid and fix it with the two countersunk screws (pos. 1in figure 3-20).

  • Page 37: Top Hat Rail Mounting

    DIQ/S 281 Installation Mounting the DIQ/ S 281 with sun shield Mounting the with sun shield figure 3-21 DIQ/S 281 SD/K 170 Remove the two countersunk screws (pos. 1 in figure 3-21) and swing open the module lid. Position the universal transmitter on the sun shield and fix it into place with the two screws (pos.

  • Page 38: Panel Mounting

    3.6.5 Panel mounting Variants of the DIQ/S 281 without fieldbus interface can be mounted to a switch panel with the PMS/IQ mounting set. For variants of the DIQ/S 281 with fieldbus interface, we recommend using the PMS/IQ-X mounting set.
  • Page 39 Switch panel Max. thickness mounting sets DIQ/S 281 mounting set aperture of the switch panel DIQ/S 281 -CR2 PMS/IQ 138 x 138 mm 10 mm DIQ/S 281-MOD PMS/IQ-X 186 x 186 mm 8 mm Switch panel Details on panel mounting with the PMS/IQ-X mounting set are given in the mounting with operating manual of the PMS/IQ-X.
  • Page 40 3-24 Mounting the DIQ/S 281 in a switch panel Angle bracket Bolts Bolts Impact protection plate Bolts to fix the impact protection plate Insert the universal transmitter in the panel aperture from the front.

  • Page 41: Electrical Connections: General Instructions

    DIQ/S 281 Installation Fix the impact protection plate (Pos. 4) to the back of the DIQ/S 281 with the bolts (Pos. 5). Electrical connections: General instructions Cable glands All electric cables are fed from below through openings prepared in the enclo- sure of the DIQ/S 281 and the DIQ modules.

  • Page 42: Connecting The Voltage Supply

    Installation DIQ/S 281 General Observe the following points when attaching connecting wires to the terminal installation strip instructions  Shorten all wires to be used to the length required for the installation  Always fit all the ends of the wires with wire end sleeves before connecting them to the terminal strip ...

  • Page 43: Diq/S 281 (Line Power Version)

    DIQ/ S 281. The interrupt facility must – be installed in the vicinity of the DIQ/S 281 universal transmitter, easily accessible by the user, and – be labeled as the interrupt facility for the DIQ/S 281 universal transmitter.
  • Page 44 The ground wire must not project into the enclosure. Otherwise, malfunctions could occur. Connecting the On the left-hand side of the DIQ/S 281, remove the two countersunk power line screws and open the enclosure. figure 3-26 Inserting the supply line.
  • Page 45 Always cut off any wires that are not in use as closely as possible to the cable gland. Close the enclosure of the DIQ/S 281. ba76226e02 03/2023...

  • Page 46: Diq/S 281/24V (24 V Version)

    – be installed in the vicinity of the DIQ/S 281 universal transmitter, easily accessible by the user, and – be labeled as the interrupt facility for the DIQ/S 281 uni- versal transmitter. Rechargeable battery systems should have a deep discharge protection.
  • Page 47 1 wire 2 figure 3-28 Prepared 24 V AC/DC line. Connecting the On the left-hand side of the DIQ/S 281, remove the two countersunk 24 V AC/DC line screws and open the enclosure. figure 3-29 Inserting the 24V AC/DC line Screw a cable gland (pos.
  • Page 48 No free wires are allowed to project into the housing. Otherwise there is the dan- ger of short circuits that can cause a fire. Always cut off any wires that are not in use as closely as possible to the cable gland. Close the enclosure of the DIQ/S 281. ba76226e02 03/2023...

  • Page 49: Connections To The Relay And Current Outputs

    Materials required  Wire end sleeves, suitable for the connecting wires, with suitable crimping tool  4 x cable gland with sealing ring (scope of delivery of the DIQ/S 281) Tools  Cable stripping knife  Wire stripper ...
  • Page 50 Installation DIQ/S 281 Connecting lines On the left-hand side of the DIQ/S 281, remove the two countersunk to the terminal screws and open the enclosure. strip figure 3-31 Inserting lines The complete assignment of the terminal strip is shown in section 3.12.

  • Page 51: Usage Of The Auxiliary Voltage

    Close the enclosure of the DIQ/S 281. 3.9.2 Usage of the auxiliary voltage The universal transmitter DIQ/S 281 has a 24 V output (designation HILFSSPANNUNG or AUXILIARY VOLTAGE on the terminal strip). You can use this auxiliary voltage for the relay-controlled opening of the valve in a DIQ/ CHV valve module for the compressed air-driven sensor cleaning function.

  • Page 52: Commissioning

    4 Is the sensor ready for measuring, e.g. a D.O. sensor filled with electrolyte solution? Starting the Switch on the power supply of the DIQ/S 281. As soon as the system is success- system fully initialized, the measured value display appears. With a sensor not yet pro- viding any measurement values, "Init"...
  • Page 53 Initial start phase The Universal Transmitter is initialized during the first start phase. All compo- nents are automatically registered with the Universal Transmitter DIQ/S 281. The system then performs a self test. This process can take several seconds. During this period, the following display appears:...

  • Page 54: Installation Examples

    Installation DIQ/S 281 3.11 Installation examples 3.11.1 Connection of a sensor without compressed air cleaning Maximum total cable length DIQ/S 281(/24V) SNCIQ(/UG) plus SACIQ = 250 m DIQ/S 281 DIQ/S 281 UNIVERSAL TRANSMITTER UNIVERSAL TRANSMITTER DIQ/S 281(/24V) SNCIQ(/UG) SNCIQ(/UG) DIQ/JB...

  • Page 55: Connection Of A Sensor With Compressed Air Cleaning

    DIQ/S 281 Installation 3.11.2 Connection of a sensor with compressed air cleaning Maximum total cable length DIQ/S 281(/24V) SNCIQ(/UG) plus SACIQ = 250 m DIQ/S 281 DIQ/S 281 UNIVERSAL TRANSMITTER UNIVERSAL TRANSMITTER SNCIQ(/UG) Valve control line DIQ/JB DIQ/CHV SACIQ Sensor...
  • Page 56 Installation DIQ/S 281 Klemmleiste AUXILIARY VOLTAGE DIQ/S 281 X15 X14 13 X12 X11 X10 Ventil- Steuerleitung Klemmleiste DIQ/CHV DISTRUBUTION VALVE Connection Shield/filler strand Shield/filler strand diagram, terminal strip SNCIQ(/UG) SNCIQ(/UG) DIQ/JB green green green white & brown green Sensor Sensor...

  • Page 57: Connection Of A Sensor That Is Located At A Distance

    DIQ/S 281 Installation 3.11.3 Connection of a sensor that is located at a distance (without compressed air cleaning) DIQ/S 281(/24V) Maximum total cable length DIQ/S 281 DIQ/S 281 UNIVERSAL TRANSMITTER UNIVERSAL TRANSMITTER SNCIQ(/UG) plus SACIQ = 250 m SNCIQ(/UG) DIQ/S 281...

  • Page 58: Figures Of The Terminal Strips

    Installation DIQ/S 281 3.12 Figures of the terminal strips DIQ/S 281 ≤ 240V AC ≤ 240V AC 0/4...20mA 0/4...20mA -CR2 ≤ ≤ 2A AC 2A AC AUXILIARY VOLTAGE 100... 240V AC + REC - + REC - SENSORNET 1 MAINS...

  • Page 59: Operation

    The 5 keys <M>, <C>, <S>, <ESC>, <OK> and the arrow keys < > are used to operate the DIQ/S 281 Universal Transmitter. DIQ/S 281 DIQ/S 281...

  • Page 60: Display

    Operation DIQ/S 281 4.1.2 Display figure 4-2 Display 1 Name of the display indication (is skipped in the measured value display) Name of the instrument (and series number, e.g. S281-20340001) Date, time User right (details see below) Error symbol If the error symbol flashes, a new or unacknowledged error message is present in the log book that requires immediate action (see section 4.5.3).
  • Page 61 DIQ/S 281 Operation Measured value The measured value display contains the following information: display figure 4-3 Display - measured value display 1 Consecutive numbering of the measured values Main measured value Adjoining measured value with unit Series number of the sensor...

  • Page 62: Keys

    The selection highlighted with the arrow keys is displayed as white text on a blue background. General operating principles The operation of the DIQ/S 281 is standardized and user-friendly.  Select an item with the arrow keys < > – Highlight individual elements in menus, lists and tables, e.g. menu entries, list elements, columns or fields –...

  • Page 63: Navigating In Menus, Lists And Tables

    DIQ/S 281 Operation Short operating instructions are given in the help lines on the dis- play. Examples of the operating principles are given below:  Navigation in menus, lists and tables (see chapter 4.2.1)  Entering text and numerical values (see chapter 4.2.2) 4.2.1 Navigating in menus, lists and tables...

  • Page 64: Entering Texts Or Numerals

    Operation DIQ/S 281 4.2.2 Entering texts or numerals You can assign names to the outputs. Example: Einstellungen/Settings Open the menu with <S>. Edit list of outputs Select the menu item with < >. Edit list of outputs Confirm the menu item with <OK>.
  • Page 65 DIQ/S 281 Operation Edit list of outputs figure 4-6 The following letters, numerals and special characters can be entered: AaBb..Zz0..9µ%&/()+-=><!?_ °. Select a letter or numeral with < >. Confirm the letter with <OK>. The character appears behind the last letter.

  • Page 66: Access To The Diq/S 281 With Active Access Control

    Access control is switched off in the delivery condition. No login to the DIQ/S 281 is required. As soon as an access control of any type is enabled, access to the DIQ/S 281 is protected completely or partly. Access to the system is enabled as follows: ...

  • Page 67: Display Of Current Measured Values

    Messages and log book The DIQ/S 281 Universal Transmitter continuously monitors the status of the entire system. If the DIQ/S 281 identifies any system changes, a message appears. New messages can be recognized by the flashing information symbol or error symbol on the display.

  • Page 68: Log Book

    4-9 1 Message category (error or info symbol) Module that triggered the message. system (Universal Transmitter, controller) IQ sensor (number 01) DIQ/S 281 output (number 01) Message code Date and time of the message Status field of the message ✔...
  • Page 69 DIQ/S 281 Operation The system provides the following log books: Log book of entire system  List of all messages from all modules Log book of sensor  List of all messages of the IQ sensor. There is a detailed message text for each message of a module that is ready for operation.

  • Page 70: Viewing Detailed Message Texts

    Operation DIQ/S 281 Example: The "171" module (Universal Transmitter DIQ/S 281) sends a message with the Message code short message form "II2". II2171 This is an info message (I) of the type Installation (I) with the type number (2). The detailed message text of the short form message (II2) can be found in the log book and in the operating manual of the component that sent it.

  • Page 71: Acknowledge All Messages

    DIQ/S 281 Operation Log book of entire system figure 4-10 Acknowledge the message with <OK>. A checkmark appears in the log book entry. Exit the message text with <ESC>. Acknowledgment of a new message text in the log book marks the message as read.

  • Page 72: Calibration Data

    All calibration data are stored in the IQ sensor. In order to view the calibration data of an IQ sensor, the IQ sensor must be connected to the DIQ/S 281 and must be ready for operation. 4.6.1 Calibration entries in the log book The date and time of a calibration are entered in the log book.

  • Page 73: Calibration History

    DIQ/S 281 Operation Select and open a calibration entry (ECxxxx or ICxxxx) with < > and <OK>. Log book of sensor Exit the window with <M> or <ESC>. 4.6.2 Calibration history The calibration history contains the detailed calibration data of the last calibra- tions.

  • Page 74: General Course When Calibrating, Cleaning, Servicing Or Repairing An Iq Sensor

    Operation DIQ/S 281 List of all components with sensor info figure 4-11 Status of output channels Exit the window with <M> or <ESC>. General course when calibrating, cleaning, servicing or repairing an IQ sensor When an IQ sensor is calibrated, cleaned, serviced or repaired, the mainte- nance condition for the IQ sensor should always be switched on.

  • Page 75: Maintenance Condition Of Iq Sensors

    DIQ/S 281 Operation repair an IQ sensor. Outlet Switch on the maintenance condition for the IQ sensor (see section 4.8.2). The display of the sensor in the measured value display flashes. Pull the sensor out of the sample. Perform the calibration in the laboratory, cleaning, maintenance or repair (removing and replacing) of the sensor (about these topics, see the component operating manual of the corresponding sensor).

  • Page 76: Switching On The Maintenance Condition

    Operation DIQ/S 281 Maintenance Sensor condition cleaning ON manual Measured value Measured value display Measured value active display display The measured value Clean flashes stops flashing. The measured value Maintenance flashes. Sensor condition cleaning OFF manual (automatic sequence) Display mesage...

  • Page 77: Switching Off The Maintenance Condition

    (see section 4.8.3). USB interface The USB interface on the DIQ/S 281 can be used for the following actions:  Carrying out a software update (see section 4.11)

  • Page 78: Info On Software Versions

    USB interface (see section 4.11). 4.11 Software-Update for the DIQ/S 281 and sensors With a Software-Update, you maintain the latest state of the instrument software for the Universal Transmitter DIQ/S 281 and all active components. ba76226e02 03/2023...
  • Page 79 Internet at www.YSI.com. The instrument software is transferred to the DIQ/S 281 via the USB port and with the aid of a USB memory device. A Software-Update does not change the measurement settings, measurement data and calibration data.

  • Page 80: Settings/Setup

    English. To acti- vate the selected system language for this component, a software update of the component is required (see section 4.11). Terminal settings of the DIQ/S 281 The terminal settings include: Terminal name ...

  • Page 81: Access Control

    Access control Access control Use the function to define the safety settings for the DIQ/S 281. The DIQ/S 281 provides the following levels of system security:  Access control (4 authorization levels, see section 5.3.1): –...

  • Page 82: Activating The Access Control

    Access control is switched off in the delivery condition. Every user can carry out all functions. Saving the If access control for the DIQ/S 281 is active and the administrator password is password lost, rapid administrator access to the DIQ/S 281 is no longer possible.
  • Page 83  Instrument block switched off: Viewer instrument User rights as for on which  Instrument block active: the function The DIQ/S 281 is blocked. Only the was acti- IQ S logo is displayed. Access ENSOR vated only with password. Switching on the...

  • Page 84: Activating The Instrument Block

    Settings/setup DIQ/S 281 password can be accepted or changed. Press < > to select an user right and confirm with <OK>. If necessary, change the password in the selection dialog and/or save the password to a connected USB memory. Note passwords.

  • Page 85: Electronic Key

    The administrator can simplify access to the DIQ/S 281 by saving the password to USB memory. The USB memory thereby becomes an electronic key. When the electronic key is connected to the DIQ/S 281, the user right stored there with the relevant password is automatically read out. The user of the elec- tronic key is logged on to the system with his user right without any further pass- word prompt.

  • Page 86: Access To The Diq/S 281 With Active Access Control

    The password for the selected authorization level is saved to the USB memory device. 5.3.4 Access to the DIQ/S 281 with active access control  Administrator access through entering the password: – After 10 minutes without key-pressing, the highest protection level is automatically activated.
  • Page 87 DIQ/S 281 Settings/setup menu and enhanced sensor functions: All sensors Measured value display Settings / Einstellungen Settings of sensors Column, measuring range Sensor Note : links are deleted Sensor setting menu figure 5-4 Calling up the sensor settings If the measuring mode or measured parameter are changed, a link...

  • Page 88: Editing The List Of Outputs

    Settings/setup DIQ/S 281 Editing the list of outputs Edit list of outputs display provides an overview of all outputs, links and inactive datasets. Linking outputs and sensors (seesection 6.4). For the easier identification of the outputs, you can assign an individual name to...

  • Page 89: Alarm Settings

    DIQ/S 281 Settings/setup Edit list of outputs figure 5-6 -> enter a name Alarm settings 5.6.1 General information Under this menu item you can specify reactions on certain alarm events. An alarm event is when a certain measured value (limiting value) of a sensor is exceeded or undercut.
  • Page 90 Settings/setup DIQ/S 281 Alarm settings Alarm link overview figure 5-7 -> Sensor The sensor number and serial number is displayed in the column. Select an alarm A01 to AXX to be edited with < >. To set up a Sensor new alarm without entry select in the column.
  • Page 91 DIQ/S 281 Settings/setup Set alarm link figure 5-9 Edit the setting table. The required operating steps are described in detail in section 4.2 G ENERAL OPERATING PRINCIPLES Alarm links setting table Menu item Selection/Values Explanations Measured variable Main variable Main variable ...

  • Page 92: Alarm Output To Display

    Settings/setup DIQ/S 281 Menu item Selection/Values Explanations Relay output Dxx / .../Ry Opens a list with all relay outputs where the Alarm contact is set. Dxx: number of the output module .../Ry: relay output channel No relay output Here you can select a relay output. When the alarm event occurs, it carries out the specified action (Open or Close).

  • Page 93: Alarm Output As Relay Action

    5.6.4 Alarm output as relay action The relay outputs of the DIQ/S 281 can be configured so a relay action is trig- gered when an alarm event occurs (Open or Close). For this the Alarm contact Settings of outputs and links...

  • Page 94: Location Altitude / Average Air Pressure

    Date/Time Complete the entries on the display The clock in the DIQ/S 281 bridges periods of power failure of up to several hours. After a longer power failure, the clock starts precisely at the time of the failure. A message and an entry in the log book provide information on the power failure and the necessity for reset- ting the clock.

  • Page 95: Function Code

    DIQ/S 281 Settings/setup Location altitude/Air pressure figure 5-12 Set altitude of location Set air pressure Press < > to select and confirm with <OK>. Loc. altitude: Air pressure: Press < > to change the values for and confirm with <OK>.

  • Page 96: Outputs

     Relay outputs work as openers or closers.  Current outputs provide a current depending on the measured value. On the DIQ/S 281 you can do the following:  Assign names for the outputs (see section 6.3).  Link any outputs with the sensor (see section 6.4) ...

  • Page 97: Basic Information On Relay Functions

    DIQ/S 281 Outputs Basic information on relay functions This chapter describes general basic information concerning the following relay functions:  Monitoring (see section 6.2.1)  Limit indicator (see section 6.2.2)  Proportional output (see section 6.2.3) 6.2.1 Monitoring Open Close...

  • Page 98: Proportional Output

    Outputs DIQ/S 281 Monitoring limit- Measured ing values using value one or two relays Relay 1 Hysteresis UL Hysteresis LL Relay 2 Time 1 Upper limit value (relay 1) exceeded Selected switching delay t1 for relay 1 1 expired Relay 1 switches...
  • Page 99 DIQ/S 281 Outputs Proportional outputs can be used in the following way:  Output with one relay: Start value End value An output range is defined with a and an . No output takes place above and below the output range (see page 99).
  • Page 100 Outputs DIQ/S 281 Pulse width output The output of the pulse width is used, e.g. for controlling valves. Pulse-width regulation changes the duration of operation (t ) of the output sig- nal. Depending on the position of the measured value in the proportional range, the relay is operated for a longer or shorter period.
  • Page 101 DIQ/S 281 Outputs switched more often or less often. Relay t = 0.3 s Time [s] figure 6-5 Relay output of frequency output While the selected switching duration (t = 0.3 s) always remains con- stant, the switching frequency at which the relay switches changes depending on the measured value.
  • Page 102 Outputs DIQ/S 281 Switching frequency f or Pulse width Max. Min. Measured value Start value End value figure 6-6 Positive characteristic curve Switching frequency f or Pulse width Max. Min. Measured value End value Start value figure 6-7 Negative characteristic curve...
  • Page 103 DIQ/S 281 Outputs The proportional output range begins above the initial value. If the proportional Positive character- range is undercut or exceeded, the selected behavior comes into force. istic curve Pulse width v [%] Cycle duration T Of f Proportional...
  • Page 104 Outputs DIQ/S 281 The proportional output range begins below the initial value. If the proportional Negative charac- range is undercut or exceeded, the selected behavior comes into force. teristic curve Pulse width v [%] Cycle duration T Of f Proportional...

  • Page 105: Entering / Editing The Name Of An Output

    DIQ/S 281 Outputs Entering / editing the name of an output For easier identification of the outputs, an individual name can be given to each Edit list of outputs output in the overview. Einstellungen/Settings Open the menu with <S>. System Using <...

  • Page 106: Linking The Output With A Sensor

    Outputs DIQ/S 281 Linking the output with a sensor Einstellungen/Settings Open the menu with <S>. System Using < > and <OK>, select and confirm the menu item, settings Settings of outputs and links -> Settings of outputs and links display opens.

  • Page 107: Deleting A Link With An Output

    DIQ/S 281 Outputs Deleting a link with an output If a link between a current or relay output and a sensor is no longer required, you can erase the link. Einstellungen/Settings Open the menu with <S>. System Using < > and <OK>, select and confirm the menu item,...

  • Page 108: Setting The Relay Outputs

    Outputs DIQ/S 281 Setting the relay outputs Call up the measured value display with <M>. Einstellungen/Settings Open the menu with <S>. Settings of outputs and Using < >, highlight the menu item, links Settings of outputs and links , and confirm with <OK>. The display appears.

  • Page 109: Relay Action

    DIQ/S 281 Outputs Function Description No function The relay output is not used. System monitoring see section 6.6.2 Sensor monitoring see section 6.6.3 Limit indicator see section 6.6.4 Frequency controller see section 6.6.5 Pulse-width output see section 6.6.6 Cleaning see section 6.6.7 Manual control see section 6.6.8...

  • Page 110: System Monitoring

     The sensor, which is properly registered to the DIQ/S 281, does not provide a valid secondary measured value  The internal output module has not received any new data DIQ/S 281 for 2 minutes. In any case, the relay remains open for 10 seconds and only closes when the malfunction is no longer present.

  • Page 111: Sensor Monitoring

    DIQ/S 281 Outputs Sensor monitoring 6.6.3 Sensor monitoring Function function enables the monitoring of sensor errors and the maintenance condition. Sensor monitoring In order to set up the function for a relay output, the relay out- put must be linked with the sensor (see section 6.4).

  • Page 112: Limit Indicator

    Outputs DIQ/S 281 Limit indicator 6.6.4 Limit value UL Limit Function The characteristic of the limit indicator is laid down in the value LL Hysteresis UL Hysteresis LL settings. The fundamentals of the function are described in the introductory chapter (see section 6.2.2).
  • Page 113 DIQ/S 281 Outputs the function are described in the introductory chapter (see section 6.2.3). Frequency controller In order to set up the function for a relay output, the relay output must be linked with a sensor (see section 6.4). Settings...

  • Page 114: Pulse-Width Output

    Outputs DIQ/S 281 Pulse-width output 6.6.6 Start value Function The characteristic of the pulse width output is laid down in the value Pulse width (v) min. Pulse width (v) max. settings. The fundamentals of the function are described in the introductory chapter (see section 6.2.3).
  • Page 115 DIQ/S 281 Outputs Cleaning In order to set up the function for a relay output, the relay output must be linked with a sensor (see section 6.4). The relay of the combination output module assigned always works as a closer.
  • Page 116 Outputs DIQ/S 281 Cleaning duration * With short cleaning intervals, the adjustable values for the Adjustment time are limited. The following values apply: Cleaning interval Cleaning duration Adjustment time ≤ max. 60 s max. 120 s 10 min ≤ max. 180 s max.
  • Page 117 DIQ/S 281 Outputs t1a t1b relay condition closed open 00:00 04:00 12:00 20:00 24:00 Time 1 Reference time Begin of a cleaning cycle (t1) Cleaning duration Begin of the specified (t1a) Cleaning duration End of the specified (t1a) Adjustment time...

  • Page 118: Manual Control

    Outputs DIQ/S 281 The next cleaning cycle will be performed at the time set up. In case of a power failure, all relays open. The cleaning cycle is canceled. The outputs linked with the sensor change to the non- active condition (see section 6.9.2). As soon as the power is avail- able, the outputs are released again.

  • Page 119: Setting The Current Outputs

    DIQ/S 281 Outputs Setting the current outputs Call up the measured value display with <M>. Einstellungen/Settings Open the menu with <S>. Settings of outputs and links Using < >, highlight the menu item, Settings of outputs and links and confirm with <OK>. The display appears.

  • Page 120: Recorder

    Outputs DIQ/S 281 Save and quit Using < > and <OK>, highlight and confirm The new settings are stored. Recorder 6.7.1 Function The measured values of the linked sensor at the current output are set up as cur- Recorder rent intensity in the application.

  • Page 121: Pid Controller

    DIQ/S 281 Outputs PID controller 6.7.2 PID controller Function function can use an output as a controller output. The regu- lator can be configured as a Proportional regulator with switchable Integral and Differential regulator parts (PID Controller). The control response of the PID controller is described by the following formula: ...
  • Page 122 Outputs DIQ/S 281 Regulator type 1 to 9999 PI controller 1 to 9999 PD controller 1 to 9999 1 to 9999 PID controller Characteristic For a pure P controller the correlation between the measured value and current curve of the...
  • Page 123 DIQ/S 281 Outputs 0 s (no I algorithm) 0 s (no D algorithm) The control parameters result in the following (negative) characteristic curve: Current I [mA] Imax Imin Measured value [mg/l] Nominal value figure 6-18 Characteristic curve for application example...
  • Page 124 Outputs DIQ/S 281 Settings Setting Selection/Values Explanation Measured Main variable Main variable designates the actual variable Adjoining variable measured parameter of the sensor (e.g. pH, oxygen, etc.). Adjoining variable designates an additional measured parameter (e.g. temperature). Nominal value within the measuring...

  • Page 125: Fixed Current Value

    DIQ/S 281 Outputs Fixed current value 6.7.3 Fixed current value Function function can be used to test the operativeness of the instruments connected to the outputs: output different current values to the out- put and, while doing so, check the behavior of the connected instrument.

  • Page 126: Behavior In Non-Operative Condition

     The linked sensor does not provide any valid measured value (display of Init, Error, "-----", or OFL)  Communication with the DIQ/S 281 is interrupted for more than 2 minutes.  The supply voltage for the DIQ/S 281 is too low.

  • Page 127: Maintenance And Cleaning

    DIQ/S 281 Maintenance and cleaning Maintenance and cleaning Maintenance Maintenance Component Maintenance activities IQ sensors Depending on the type of sensor (see the component operating manual of the sensor) No maintenance required DIQ modules Cleaning Clean components mounted in the open of gross contamination as necessary.

  • Page 128: What To Do If

    Information on errors Log book The DIQ/S 281 system performs a comprehensive cyclical self test during oper- ation. While doing so, the system identifies all states that deviate from normal operation and enters corresponding messages in the log book (information or error message).

  • Page 129: Replacing System Components

     DIQ/CHV (module for automatic compressed air cleaning)  Cables (SNCIQ, SACIQ). WARNING If the universal transmitter DIQ/S 281 is opened during op- eration, there is a danger to life due to possible hazard of electric shock. The Universal Transmitter DIQ/S 281 may only be opened while the mains voltage is switched off.
  • Page 130 What to do if ... DIQ/S 281 inactive dataset is available for the sensor type. If an inactive dataset for the sensor type is available, the inactive dataset is auto- matically assigned to the newly connected sensor. The IQ sensor starts oper- ating with the settings from the inactive dataset.

  • Page 131: Technical Data

    Technical data DIQ/S 281 Dimensions Lateral view: Front view: DIQ/S 281-CR2 144,0 52,2 68,0 DIQ/S 281 DIQ/S 281 UNIVERSAL TRANSMITTER 11,0 Rear view: 16,5 115,0 70,0 137,0 figure 9-1 Dimension drawing of the DIQ/S 281 (dimensions in mm) ba76226e02 03/2023...
  • Page 132 UNIVERSAL TRANSMITTER 21,0 11,0 16,5 Rear view: 115,0 70,0 137,0 figure 9-2 Dimensional drawing DIQ/S 281-MOD (dimensions in mm) Mechanical Enclosure material Polycarbonate with 20 % glass fiber structure Weight Approx. 1.2 kg Type of protection IP 67 (not directly suitable for conduit connection)
  • Page 133 DIQ/S 281 Technical data Test certificates cETLus, CE Ambient Temperature conditions Mounting/installa- + 5 °C ... + 40 °C (+ 41 ... +104 °F) tion/maintenance Operation - 20 °C ... + 55 °C (- 4 ... + 131 °F) Storage - 25 °C ...
  • Page 134 Technical data DIQ/S 281 Power consumption max. approx. 20 W Electrical The electrical connections are inside the housing. connections Assignment of the terminal strips: See section 3.12. DIQ/S 281-CR2 Relay Output Galvanically separated (2 x) Max. switching voltage 240 VAC or 24 VDC Max.
  • Page 135 Immediately close the USB connection with the protective cover when you have removed the USB device. When the USB connection is open, there is a danger of corrosion. Fieldbus DIQ/S 281 variant Fieldbus connection connection DIQ/S 281-MOD Modbus RTU (RS 485) * Connection via 9-pin D-SUB socket on the underside of the housing, compatible with Phoenix connector (IP67).

  • Page 136: Diq/Jb

    Technical data DIQ/S 281 DIQ/JB Dimensions DIQ/JB figure 9-3 Dimension drawing of DIQ/JB (dimensions in mm) Mechanical Enclosure material Polystyrene structure Weight Approx. 0.2 kg Type of protection IP 66 (not directly suitable for conduit connection) Conduits have to be connected with the flexible CC- Box adapters, or with CC-PM adapters.

  • Page 137: Diq/Chv

    DIQ/S 281 Technical data DIQ/CHV Dimensions DIQ/CHV figure 9-4 Dimension drawing of DIQ/CHV (dimensions in mm) Mechanical Enclosure material Polystyrene structure Weight Approx. 0.3 kg Type of protection IP 66 (not directly suitable for conduit connection) Conduits have to be connected with the flexible CC- Box adapters, or with CC-PM adapters.

  • Page 138: Space Required By Mounted Components

    Switching voltage Approx. 22 V Max. switching current Approx. 40 mA NOTE The valve may only be operated with the auxiliary voltage of the DIQ/S 281 uni- versal transmitter. Compressed air Required air quality Dry, free of dust and oil Operating pressure Max.

  • Page 139: Diq/S 281 With An Additional Component (Stack Mounting)

    DIQ/S 281 Technical data 9.4.2 DIQ/S 281 with an additional component (stack mounting) Wall mounting and top hat rail Wall or top hat rail mounting mounting: Space for screw driver figure 9-7 Space required for wall and top hat rail mounting: (dimensions in mm)

  • Page 140: Accessories And Options

    480052Y Set for panel mounting of DIQ modules PMS/IQ 480048Y Set for panel mounting of the DIQ/S 281-MOD. The interface (- PMS/IQ-X 480049Y MOD) is mounted behind the switch panel. Kit for mounting of DIQ modules on a 35 mm top hat rail in...

  • Page 141: Messages

    DIQ/S 281 Messages Messages 11.1 Explanation of the message codes The log book contains a list with all the messages from all modules. Each message consists of message code, date and time. You can obtain more detailed information by opening the full message text (see section 4.5).

  • Page 142: Informative Messages

    Messages DIQ/S 281 Message code Message text Connection to the component instable EI8171 * Check installation and cable lengths, Follow installation instructions * Set SN terminator switch acc. to operating manual * Check environmental effects * Component defective, contact service...

  • Page 143: Index

    Terminal strip ........58 Maintenance condition ........74 Measured value display ......53, 61 Dimensions Messages ...........67 DIQ/S 182 .......... 132 Code .............69 DIQ/S 281 .......... 131 Texts .............70 DIQ/S 28X .......... 132 Types ............67 DIQCHV ..........137 DIQJB ..........136 Display ............60 Operating elements ........59...
  • Page 144 DIQ/S 281 Index SENSOR connection (terminal strip) ..58 Setting the date .......... 93 Setting the time .......... 93 Settings ............80 Air pressure .......... 94 Alarms ..........89 Date ............93 Site altitude ........... 94 Terminal ..........80 Time ............. 93 Site altitude ..........

  • Page 145: Contact Information

    DIQ/S 281 Contact Information Contact Information 13.1 Ordering & Technical Support Telephone: (800) 897-4151 (937) 767-7241 Monday through Friday, 8:00 AM to 5:00 PM ET Fax: (937) 767-1058 Email: info@ysi.com Mail: YSI Incorporated 1725 Brannum Lane Yellow Springs, OH 45387 Internet: www.ysi.com...
  • Page 146 DIQ/S 281 Contact Information ba76226d02 03/2023...
  • Page 148 150 countries, we have strong, long-standing relationships with customers who know us for our powerful combination of leading product brands and applications expertise, backed by a legacy of innovation. For more information on how Xylem can help you, go to www.xyleminc.com 1725 Brannum Lane Yellow Springs, OH 45387 Tel: +1 937-767-7241;...

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