Datcon DT4120 Series Operating Instructions Manual
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Datcon DT4120 Series Operating Instructions Manual

Temperature / resistance / potentiometer meter-transmitter
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DT4120 xx xx (PS)
Temperature / Resistance / Potentiometer
Meter-Transmitter
Operating Instructions

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Summary of Contents for Datcon DT4120 Series

  • Page 1 DT4120 xx xx (PS) Temperature / Resistance / Potentiometer Meter-Transmitter Operating Instructions...

  • Page 2: Table Of Contents

    DT4120 xx xx (PS) Contents 1. About this document .............4 1.1. Function ................... 4 1.2. Target group................4 1.3. Symbolism used............... 4 2. For your safety ...............5 2.1. Authorized personnel ............... 5 2.2. Appropriate use................ 5 2.3. Warning about misuse ............. 5 2.4.
  • Page 3 DT4120 xx xx (PS) 7. Setting-up ..............28 7.1. Typing the code (password) in ..........28 7.2. The menu structure ..............30 7.3. Display brightness (01. menu item)........31 7.4. Connecting wire setting (02. menu item)........ 32 7.5. Two wire zeroing (03. menu item).......... 34 7.6.

  • Page 4: About This Document

    DT4120 xx xx (PS) 1. About this document 1.1. Function This operating instructions manual has all the information you need for quick set-up and safe operation of DT4120 xx xx (PS). Please read this manual before you start setup. 1.2. Target group This operating instructions manual is directed to trained personnel.

  • Page 5: For Your Safety

    For safety and warranty reasons, any internal work on the instruments must be carried out only by DATCON personnel. 2.2. Appropriate use DT4120 xx xx (PS) Temperature / Resistance /...

  • Page 6: Product Description

    DT4120 xx xx (PS) 3. Product description 3.1. Delivery configuration Delivered items The scope of delivery encompasses: • DT4120 xx xx (PS) • 1 pc. panel sealing (1) • 2 pc. mounting clamps (enclosed in a nylon bag) • 1 pc. 4 element plug in terminal (analogue or communication option) (2) •...

  • Page 7: Principle Of Operation

    DT4120 xx xx (PS) 3.3. Principle of operation Area of application DT4120 xx xx (PS) Resistance Thermometer enable process temperature, resistance value or potentiometer’s wiper position to be displayed on the control panel. Pt100 / Pt500 / Pt1000 temperature sensor, resistor or potentiometer can be connected to the input of the instrument, either with 2, 3 or 4 wire.

  • Page 8: Adjustment

    DT4120 xx xx (PS) Operating principle The measuring current flows through the sensor / resistance / potentiometer connected to the input. The voltage drop on the measuring sensor is compared with the voltage drop on the internal reference resistor. The voltage difference is led to a 21 bit A/D converter.

  • Page 9: Display, Indicators

    DT4120 xx xx (PS) 3.5. Display, indicators The following figure shows the front panel of the instrument: 1. 5 digit 7 segment LED for displaying the measured value and the mnemonic messages. 2. „Rel1” yellow indicator for indicating that limit output 1 is in “on-state”...

  • Page 10: Mounting

    DT4120 xx xx (PS) 4. Mounting 4.1. General instructions Use the enclosed seal between the instrument and the panel when mounting the instrument to assure IP 65 from the front. Mounting positions Select a mounting position you can easily read the display reach for mounting and connecting the instrument and that minimises the hazard of water, dust or dump getting into the instrument.

  • Page 11: Mounting

    DT4120 xx xx (PS) 4.3. Mounting Preparatory steps The instrument is housed in a DIN standard 96 x 48 x 50 mm ABS case. It can be fix in the panel with the two enclosed mounting clamps. Dimensions of panel cutout 1.
  • Page 12 DT4120 xx xx (PS) Mounting with the mounting clamps 2. Put on the enclosed seal onto the instrument case from the rear side and fit it to the instrument holding frame (Figure step 2). 3. Put the instrument into the prepared cut-out until it possible and check the fitting of the seal between case and mounting surface.

  • Page 13: Connecting

    DT4120 xx xx (PS) 5. Connecting 5.1. Preparing the connection Always observe the following safety instructions: • Connect or disconnect only in the complete absence of line voltage • Take note the data concerning on the overcurrent protection in installation. •...

  • Page 14: Connecting The Mains

    DT4120 xx xx (PS) 5.2. Connecting the mains The following figure shows the wiring plan, connecting the DT4120 xx xx xx PS type instrument to the mains: Wiring plan, connecting the instrument to the mains (see also “Application example”) In case of DC supply the polarity is indifferent The following figure shows the wiring plan, connecting the DT4120 xx xx xx type instrument to the low voltage power...

  • Page 15: Connecting The Sensor To The Input

    DT4120 xx xx (PS) 5.3. Connecting the sensor to the input The following figure shows the wiring plan, connecting the input: Wiring plan, connecting the input (see also “Application example”) Be careful the polarity of the cables 1. Loosen terminal screws. 2.

  • Page 16: Connecting The Limit Relay Outputs (Option)

    DT4120 xx xx (PS) 5.4. Connecting the limit relay outputs (option). The following figure shows the wiring plan, connecting the limit relay outputs: Wiring plan, connecting the limit relay outputs (see also “Application example”) The push-in direct connector assemblies used allow a fast connection of the cables.

  • Page 17: Connecting The Analogue Output (Option)

    DT4120 xx xx (PS) 5.5. Connecting the analogue output (option). The following figure shows the wiring plan, connecting analogue output in case of active (DT4120 xx xx IA xx) or in case of passive (DT4120 xx xx IP xx) output: Wiring plan, connecting the analogue output (see also “Application...

  • Page 18: Connecting The Rs232 Modbus Communication Output (Option)

    DT4120 xx xx (PS) 5.6. Connecting the RS232 Modbus communication output (option). The following figure shows the wiring plan, connecting the RS232 Modbus communication output (DT4120 xx xx RS2 xx): Wiring plan, connecting the RS232 output (see also “Application example”) Be careful the polarity of the cables.

  • Page 19: Connecting The Rs485 Modbus Communication Output (Option)

    DT4120 xx xx (PS) 5.7. Connecting the RS485 Modbus communication output (option). The following figure shows the wiring plan, connecting the RS485 Modbus communication output (DT4120 xx xx RS4 xx): Wiring plan, connecting the RS485 output (see also “Application example”) Be careful the polarity of the cables.

  • Page 20: Display And Manual Controls

    DT4120 xx xx (PS) 6. Display and manual controls 6.1. The first start-up The display The display is indicated by the arrow (1) The factory default setting is: Pt100 or Pt1000 measurement (depens on the type), 4 wire connection. The display of the instrument shows the measured temperature: Accordingly, if the temperature is 24.2 degrees centigrade, ...

  • Page 21: Characters And Mnemonics Appearing On The Display

    English word in brackets and, after the hyphen, and explanation may be given. Login text DT - Datcon instrument  4120 - Type of the instrument  No output option is installed. (No Option = no option)-the ...
  • Page 22 DT4120 xx xx (PS) Error messages A/D underflow (Error: AD Underflow)  Reason of error: input signal is under of the measuring range. A/D overflow (Error: A/D Overflow)  Reason of error: input signal is over of the measuring range. Display under (Underflow) ...
  • Page 23 DT4120 xx xx (PS) During code writing Code? (Code) - type in the code!  Bad code (Bad Code)  A User login took place (User)  A Supervisor login took place (Supervisor)  During setting The typed number is lower than allowed (Low Limit) ...

  • Page 24: Manual Controls, Display, Indicators

    DT4120 xx xx (PS) 6.3. Manual controls, display, indicators DT4120 xx xx (PS) can be adjusted by the membrane push- buttons indicated by (1), (2), and (3) in the drawing. Functions of the push-buttons during measurement (1) MENU button: Entering the menu When you push this button, the instrument will ask for a password (code) in accordance with Chapter 7.1.
  • Page 25 DT4120 xx xx (PS) (2) ▲ button: displaying minimum value, maximum value, firmware version. The above values and the firmware version remains on the display as long as the button is being pressed. Using this function:  1. Press the ▲ button as long as you see this: This mnemonic indicates that it will be displayed the minimum value measured after the last clear.
  • Page 26 DT4120 xx xx (PS) Comments: • Pressing the ▲ button repeatedly, the above process starts from operation „1.”, enable to display the three values sequentially. • When you release the ▲button more than 5 sec. and you press down the button ▲ again the minimum value will be displayed independently of which value would be the next one.
  • Page 27 DT4120 xx xx (PS) indicators The following figure shows the 3 yellow indicator on the left side of DT4120 xx xx (PS) front panel: (1) Rel 1: limit output indicator (yellow) indicates that the limit output 1 is in “on-state” (LIMIT1). (2) Rel 2: limit output indicator (yellow) indicates that the limit output 1 is in “on-state”...

  • Page 28: Setting-Up

    DT4120 xx xx (PS) 7. Setting-up 7.1. Typing the code (password) in The importance of the You may enter the menu only after you have typed your code code in. The code is made from 3 numeric characters. This solution prevents unauthorised persons from changing the settings of the instrument.
  • Page 29 DT4120 xx xx (PS) Automatic exit from If no buttons are pressed, the instrument displays the the request for the code  mnemonic (Auto Escape) after 1 minute has passed from the last pressing of a button, and it RESTARTS, i. e. goes back to the measuring mode. This solution is due to security: unauthorised persons, after 4 minute, will not be able to change the settings of the instrument, should it be left alone for some reason.

  • Page 30: The Menu Structure

    DT4120 xx xx (PS) 7.2. The menu structure 01: Display brightness 31. page 02: Number of connection wires 32. page 03: Two wire zeroing 34. page 04: Ptxxx correction points 36. page 05: Measuring mode selection 40. page 06: Leading zeroes enable / disable 42.

  • Page 31: Display Brightness (01. Menu Item)

    DT4120 xx xx (PS) 7.3. Display brightness (01. menu item) Function The brightness can be set between 10-100%, in 10% steps. [factory default: 100%] Sequence of operations 1. Enter the menu by the user or the supervisor code. Chapter 7.1. Typing the code in describes how you can type the code in.

  • Page 32: Connecting Wire Setting (02. Menu Item)

    DT4120 xx xx (PS) 7.4. Connecting wire setting (02. menu item) Function The Pt1xx / resistance / potentiometer can be connected to the input either with 4 / 3 / 2 wire. The 4 wire connection gives the best result: the instrument is able to compensate the connecting cable and contact resistances.
  • Page 33 DT4120 xx xx (PS) Exit from the menu  Press the MENU button. First the mnemonic (Save),  then the mnemonic (Exit) are shown on the display. With this the storing of the settings is completed. The instrument has exited the menu and goes on with the measurement.

  • Page 34: Two Wire Zeroing (03. Menu Item)

    DT4120 xx xx (PS) 7.5. Two wire zeroing (03. menu item) Function When the Pt1xx / resistance / potentiometer is connected to the input with two wire, the wire resistance will cause a measurement error. With this function can be compensated this error.
  • Page 35 DT4120 xx xx (PS)  10. Pressing the ▲ button you you can select: 11. Press the ENTER button. The instrument will store the  wire resistance and you will see: (Ready = ready) message. Exit from the menu item 1. The instrument exit from this menu item automatically ...

  • Page 36: Pt1Xx Correction Values (04. Menu Item)

    DT4120 xx xx (PS) 7.6. Pt1xx correction values (04. menu item) Function The real Pt1xx characteristics may differ from the theoretical R-°C curve. The difference will cause a measurement error on temperature measurement. When you are capable to calibrate the Pt1xx sensor on minimum 3 points you will know the resistance difference of the theoretical and real characteristics.
  • Page 37 DT4120 xx xx (PS) 3. Enter the menu item by pressing the ENTER button.  4. You see the mnemonic: on the display. The digit “1” is blinking indicating that it can be modify. It’s meaning is: first correction point. Enter the menu item by pressing the ENTER button.
  • Page 38 DT4120 xx xx (PS) 11. After entering the correction value press MENU button.  You will see: on the display. 12. For entering the second correction value press▲button.  You will see: on the display. Enter the menu item by pressing the ENTER button. 13.
  • Page 39 DT4120 xx xx (PS) Exit from the menu item 1. After finishing the settings, press the MENU button to exit  from the given menu item, and you see: Note: If you enter the same temperature for two or three correction points the instrument will give an error message: ...

  • Page 40: Input Mode Setting (05. Menu Item)

    DT4120 xx xx (PS) 7.7. Input mode setting (05. menu item) Function The instrument has four measuring modes: • Pt100, Pt500, Pt1000 temperature • potentiometer % • potentiometer scaled • resistance [Factory default: temperature measurement.] Sequence of operation 1. Enter the menu with the supervisor code. The way the code should be type in can be found in Chapter 7.1.
  • Page 41 DT4120 xx xx (PS) Exit from menu item 1. After finishing the settings, press the MENU button to exit  from the given menu item, and you see: (2. If you want to change the settings you have done just now, or if you just want to check what you have typed in, go on with the operation from point 3.

  • Page 42: Enable / Disable Displaying The Leader Zeros (06. Menu Item)

    DT4120 xx xx (PS) 7.8. Enable / disable displaying the leader zeros (06. menu item) Function Leader zero: the zeros that stand in front of an integer of no value. E.g. the instrument displays the value 5.2 together with the leader zeros: ...
  • Page 43 DT4120 xx xx (PS) Exit from menu item 1. After finishing the settings, press the MENU button to exit  from the given menu item, and you see: (2. If you want to change the settings you have done just now, or if you just want to check what you have typed in, go on with the operation from point 3.

  • Page 44: Rounding Displayed Value (07. Menu Item)

    DT4120 xx xx (PS) 7.9. Rounding displayed value (07. menu item) Function In some case it can be useful to round the displayed value. E.g. the measured physical quantity is noisy. In this menu item you can select a rounding value. Sequence of operation 1.

  • Page 45: The Number Of Averaged Measurements (08. Menu Item)

    DT4120 xx xx (PS) 7.10. The number of averaged measurements (08. menu item) Function The instrument performs cca. 12 measurements in each seconds (5 measurements in 3 wire measuring mode). The displayed measurement result is generated as the average of several measurements. Here you can define the number of measurements that should be used for calculating the averaged numerical value.
  • Page 46 DT4120 xx xx (PS) Exit from the menu item 1. After finishing the setting, press the MENU button, to exit  from the menu item, and you see this: (2. If you want to change the setting you have done just now, or if you just want to check what you have typed in, go on with the operation from point 3 of the Sequence of operations.)

  • Page 47: Display Refresh Time (09. Menu Item)

    DT4120 xx xx (PS) 7.11. Display refresh time (09. menu item) Function The instrument performs cca. 12 measurements in each seconds. It’s too fast to see the changing of the measurement value. Here you can define the time periods by which the instrument displays the new measurement values.

  • Page 48: Setting Limit Outputs (10., 11. Menu Item)

    DT4120 xx xx (PS) 7.12. Setting limit outputs (10., 11. menu item) Function The instrument has two optional limit outputs. They are identical with each other, and work independently. Operation: the instrument keeps comparing the displayed physical value with the (adjustable) limit value. It switches the output ON or outpot OFF depending whether the displayed value is higher or lower than the limit value.
  • Page 49 H.LI, than the state of limit output doesn’t change. This operating mode is used in other DATCON instruments. Here you can use it at any control task where the AC current is the process value and you can control the process through the limit outputs.
  • Page 50 DT4120 xx xx (PS) Low limit value 8. Keep stepping by pressing the ▲ button as long as you Sequence of operations  see this sub-menu item: (Limit1 Low Limit = = limit 1, low limit value). Here you can define the numerical value by which the device will compare the measured physical values.
  • Page 51 DT4120 xx xx (PS) View of the used terms The figure shows the limit output change vs. input signal, where the value of hysteresis is > 0.  Remark: this operation is working in the mode: Setting the hysteresis 17. Enter by pressing the ENTER button. value ...
  • Page 52 DT4120 xx xx (PS) High limit value 23. Keep stepping by pressing the ▲ button as long as you Sequence of operation  see this sub-menu item: (Limit1 High Limit = limit 1, high limit value). Here you can define a second numerical value with which the instrument will compare the displayed ...
  • Page 53 DT4120 xx xx (PS) Limit output hold mode In case of basic operating mode the limit output is switching on or switching off when the conditions are exist. In limit output hold mode the output is kept in switched state and only by pressing ENTER button can be reset (limit signaling acknowledge).

  • Page 54: Limit Output State Display Mode (12. Menu Item)

    DT4120 xx xx (PS) 7.13. Limit output state display mode (12. menu item) Function The state of limit outputs may present on the display. Here you can set the condition of presenting the states. [Factory default: dynamic] Sequence of operations 1. Enter the menu by typing the user or supervisor code. The way the code should be type in is described in Chapter ...
  • Page 55 DT4120 xx xx (PS) Sequence of operations  •  (On = switched on) It displays the limit output state continuously. Keeping the ENTER button pressed it displays the measuring value.  •  (Off = switched off) There is no limit output display. Remark: Independent from the limit output state display mode the front panel indicators always signal the limit output states.

  • Page 56: Clear Minimum And Maximum Values (13. Menu Item)

    DT4120 xx xx (PS) 7.14. Clear minimum and maximum values (13. menu item) Function To clear the measured and stored mimimum and maximum values. Sequence of operations 1. Enter the menu by typing the supervisor code. The way the code should be type in is described in Chapter 7.1.

  • Page 57: Analoge Output Signal Setting (14. Menu Item)

    DT4120 xx xx (PS) 7.15. Analoge output signal setting (14. menu item) Function In this menu item you can choose between 4-20 mA and 0-20 mA output current. [Factory default: 4-20 mA] Sequence of operations 1. Enter the menu by typing a supervisor code. The way the code should be type is described in Chapter ...

  • Page 58: Assignment Analog Output Low (Start) Value To Display Value (Scaling) (15. Menu Item)

    DT4120 xx xx (PS) 7.16. Assignment analog output low (start) value to display value (scaling) (15. menu item) Function Here you can assign analog output start value (0 mA or 4 mA) to the measured (temperature, resistance, potentiometer position) value. This way you can assign any phisical range to any output range.
  • Page 59 DT4120 xx xx (PS) Exit from the menu item 1. After finishing the setting, press the MENU button, to exit  from the menu item, and you see this: (2. If you want to change the setting you have performed just now, or if you just want to check what you have typed in, continue the operation from Point 3 of the Sequence of operations.)

  • Page 60: Assignment Analog Output High (End) Value To Display Value (Scaling) (16. Menu Item)

    DT4120 xx xx (PS) 7.17. Assignment analog output high (end) value to display value (scaling) (16. menu item) Function Here you can assign analog output high value (20 mA) to the display (AC current) value. This way you can assign any phisical range to any output range.
  • Page 61 DT4120 xx xx (PS) Exit from the menu item 1. After finishing the setting, press the MENU button, to exit  from the menu item, and you see this: (2. If you want to change the setting you have performed just now, or if you just want to check what you have typed in, continue the operation from Point 3 of the Sequence of operations.)

  • Page 62: Modbus Communication Settings (17. Menu Item)

    DT4120 xx xx (PS) 7.18. MODBUS communication settings (17. menu item) Function Communication with MODBUS RTU slave protocol. The instrument can be connected to a PLC or to a computer. Here you can find how to set communication parameters. Note 1: When no communication option is installed than these parameters are indifferent.
  • Page 63 DT4120 xx xx (PS) MODBUS data rate 9. Keep stepping by pressing the ▲ button as long as you setting  see this menu item: (MODBUS Baud Rate = Sequence of operations MODBUS bit / seconds rate). 10. Enter the menu item by pressing the ENTER button. ...
  • Page 64 DT4120 xx xx (PS) MODBUS respons delay- 18. Keep stepping by pressing the ▲ button as long as you time setting (ms)  see this menu item: (MODBUS Wait = MODBUS Sequence of operations wait). 19. Enter the menu item by pressing the ENTER button. ...

  • Page 65: Tests (18. Menu Item)

    DT4120 xx xx (PS) 7.19. Tests (18. menu item) Function Testing the display, the digital outputs and the analog output. Display test 1. Enter the menu by typing either the user code or the Sequence of operations supervisor code. The way the code should be type in is described in Chapter ...
  • Page 66 DT4120 xx xx (PS) Digital (relay) output test 8. Keep stepping by pressing ▲ button as long as you see Sequence of operations  this menu item: (Test: Digital Output = digital output test). 9. Enter the menu item by pressing the ENTER button. ...
  • Page 67 DT4120 xx xx (PS) Exit from menu item 1. Press the MENU button, to exit from the menu item, and  you see this: (2. If you want to make further testing, continue the operation from Point 3 of the Sequence of operations.) (3.

  • Page 68: Changing The User Code (19. Menu Item)

    DT4120 xx xx (PS) 7.20. Changing the user code (19. menu item) Function You can define new codes instead of the factory-defined user code. The code is an optional number within the range between 0000 and 9999. [Default factory setting: 0000] Sequence of operations 1.
  • Page 69 DT4120 xx xx (PS) Sequence of operations Warning! Do not forget the user code you have defined. If you forget it, defining another one is possible only by using a supervisor code for entering into the menu. Exit from the menu item 1. As you have already left the menu item there is no need further settings.

  • Page 70: Changing The Supervisor Code (20. Menu Item)

    DT4120 xx xx (PS) 7.21. Changing the supervisor code (20. menu item) Function You can define new codes instead of the factory-defined supervisor code. The code is an optional number within the range between 0000-9999. [Default factory setting: 1000] Sequence of operations 1. Enter the menu by typing the supervisor code. The way the code should be type in is described in Chapter ...
  • Page 71 DT4120 xx xx (PS) Sequence of operations Warning! Do not forget the supervisor code you have defined. If you forget it, defining another one is possible in the service only. Exit from the menu item 1. As you have already left the menu item there is no need further settings.

  • Page 72: Potentiometer Parameters (21. Menu Item)

    DT4120 xx xx (PS) 7.22. Potentiometer parameters (21. menu item) Function When potentiometer input is selected here you can calibrate the potentiometer, here you can assign the scale values and the number of decimals of the displayed value. Assign 0% to the Enter the menu by typing a supervisor code.
  • Page 73 DT4120 xx xx (PS) 12. Keep stepping by pressing the ▲ button as long as you  see this menu item: . Here you can assign the position to 100%. The numerical value is blinking. Enter the menu item by pressing the ENTER button. 13.
  • Page 74 DT4120 xx xx (PS)  22. You see this: . The number is blinking, signaling that it can be modify. 23. Pressing the ▲ button you can set the decimal point position:  •  = 2 decimal [Factory default] ...
  • Page 75 DT4120 xx xx (PS) Assign 100% to any 32. Keep stepping by pressing the ▲ button as long as you physical value (scaling)  see this menu item: (Potentiometer Scale 100% = potentiometer scaling 0%). 33. Enter the menu item by pressing the ENTER button. Sequence of operation ...

  • Page 76: Resetting The Default Settings (21. Menu Item)

    DT4120 xx xx (PS) 7.23. Resetting the default settings (21. menu item) Function In this case all the settings are deleted, and the default factory setting is restored. Using this function makes sense in that case, when the settings of the instrument have changed so much, that it is easier to start the setting-up process from the default factory setting.

  • Page 77: Fault Rectification

    DATCON personnel. In the case of errors, it is recommended to notice of the displayed error message, as well as of the phenomenon seen. These information please communicate to the Datcon service personnel. 20170324-V0...

  • Page 78: Dismounting

    DT4120 xx xx (PS) 9. Dismounting 9.1. Dismounting procedure Before dismounting take note the warnings written in Chapter 5.1. The following figure shows the dismounting procedures: Dismounting The dismounting procedure needs a screwdriver for slotted screws. Before put off power supply and disconnect all wires. 1.

  • Page 79: Disposal

    DT4120 xx xx (PS) 9.2. Disposal According with the concerning EU directive, the Manufacturer undertakes the disposal of the instrument that are manufactured by it and intended to be destroyed. Please deliver it in contamination-free condition to the site of the Manufacturer or to a specialised recycling company. 20170324-V0...

  • Page 80: Appendix

    DT4120 xx xx (PS) 10. Appendix 10.1. Technical specifications Safety data: The connection terminals of the inputs, the outputs and the supply voltages are galvanic isolated from each other. The isolation is in compliance with the standard EN 61010-1, taking into consideration the following: Pollution level: Measurement category: Overcurrent protection in installation:...
  • Page 81 DT4120 xx xx (PS) Limit outputs (optional) Output type: 2 x SPST relays, Normally Off Contact rating: 240 VAC / 30 VDC, 3 A Refreshing time: same as the display’s one Hysteresis: 0 - ±30000 (adjustable) Active analog output (optional) Output type: galvanic isolated DC current Output ranges:...
  • Page 82 DT4120 xx xx (PS) Communication interface (optional) Type: RS232 or RS485, (isolated) Isolation voltage: 0.5 kV RS485 termination resistance: 135 ohm, you can switch on by using a short on the terminals Baud rate: 300 / 600 / 1200 / 2400 / 4800 / 9600 Baud Parity: even / odd / none Protocol:...
  • Page 83 DT4120 xx xx (PS) General data Housing: panel instrument Dimensions [mm]: 96 x 48 x 45 (width x height x depth) Panel cut off: 91 x 44 (width x height) Weight: 0.15 kg Protection: IP 65 (front) IP 30 (rear) Mounting position: optional Connection cable:...

  • Page 84: Application Example

    DT4120 xx xx (PS) 10.2. Application example Analog output option: 20170324-V0...
  • Page 85 DT4120 xx xx (PS) RS232 communication interface option: 20170324-V0...
  • Page 86 DT4120 xx xx (PS) RS485 communication interface option: 20170324-V0...
  • Page 87 DT4120 xx xx (PS) RS485 bus topology: 20170324-V0...

  • Page 88: Setting Up The Instrument (Example)

    DT4120 xx xx (PS) 10.3. Setting up the instrument (example) Remarks It is an additional example for Chapter 7. Setting-up. It helps to understand the setting of values through a practical example. The steps of the whole setting you will find in Chapter 7..

  • Page 89: Modbus Settings

    DT4120 xx xx (PS) 10.4. MODBUS settings Codes before register addresses: R = Read only W = Write only RW = Read and Write Register addresses are in decimal numerical system. R1000: Displayed value high 16 bit R1001: Displayed value low 16 bit Remark: the displayed value is 32 bit, signed, integer.
  • Page 90 DT4120 xx xx (PS) 20170324-V0...
  • Page 91 DT4120 xx xx (PS) 20170324-V0...

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