DGH DIN-140 Modbus RTD Input Module Series

DGH DIN-140 Modbus RTD Input Module Series

The DIN-140 MODBUS RTD input modules are part of the DGH's DIN-100 data acquisition module family. This input module converts analog input signal from the choice of three different RTD types (0.00385, 0.00388 or 0.00392) using the MODBUS RTU protocol to digital data at the rate of 8 conversions per second, storing the latest result in the buffer. The signal is transmitted to the computer or other processor-based controlling equipment using RS-485 port; if this is not available a DIN-191 converter to RS-232 can be used.  The DIN-140 module can be directly connected to a sensor and perform signal conditioning, linearisation, scaling and conversion to both ASCII and MODBUS values. For extra security, it utilises a non-volatile EEPROM (Electrically Erasable Programmable Read Only Memory) to store all user-selectable settings, meaning the values are maintained in the event of power loss. The DIN-140 comes pre-set with default values of 300 baud, one start bit, eight data bits, one stop bit, no parity and any address recognized, but these values can be easily changed by the user. The modules require no special software and can be connected and started up quickly and easily, however a utility software is available at no extra charge if required. The DIN-140 can be mounted on a DIN-rail directly, without need for a mounting kit.

  • Single channel analog-to-digital RTD input module
  • RS-485 output
  • Choice of 3 different RTD inputs: 0.00385, 0.00388 or 0.00392
  • Communicates using MODBUS RTU protocol
  • User-selectable features include analog input range, baud rate, parity type and others
  • Accuracy: ±0.3°C
  • Resolution: 0.1°C
  • Input connections: 2, 3 or 4 wire
  • Input burnout protection to 120 Vac
  • Maximum lead resistance of 50Ω
  • Automatic linearisation and lead compensation
  • 2 programmable single-pole digital filters for smoothing analog data
  • Power requirements: Serial = 0.75W
  • Operating temperature -25°C to +70°C

The applications for the DIN-140 data acquisition modules include:

  • Process monitoring and control
  • Remote data logging to any host computer
  • Product testing
  • Interface to PLC

Additional Features
  • 8-bit ADC, 8 conversions per second
  • Accuracy: ±0.3°C
  • Resolution: 0.1°C
  • Common mode rejection: 100dB at 50/60Hz
  • Maximum lead resistance 50Ω
  • Digital filtering
  • Input connections: 2, 3 or 4 wire
  • Operating temperature of -25°C to +70°C
  • 1 analog voltage input
  • 1 digital output
Number of channels 1 channel
Power requirements
  • Unregulated +10V to +30Vdc
  • Serial 0.75W maximum
  • 0.00385 = -200°C to +850°C
  • 0.00388 = -100°C to +125°C
  • 0.00392 = -200°C to +600°C

We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:



PDF Document DGH DIN-100 Series Datasheet
PDF Document DGH DIN-100 Series User Manual
PDF Document Command set for DIN-100 Series
PDF Document MODBUS RTU Function List
PDF Document MODBUS RTU Protocol Overview

This product is available fully compliant to the RoHS EU directive 2002/95/EC.

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  • Product Code: DGH DIN-140 Modbus Voltage Input Module
  • SKU: DGH DIN-140 Modbus Voltage Input Module
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Tags: DIN-140, DIN-141, DIN-143, DIN-142