DGH D1400 Sensor to Computer Interface RTD Input Module Series

  • DGH

Product Features

  • 8-bit ADC, 8 conversions per second
  • User selectable °C or °F
  • Accuracy: ±0.3°C maximum
  • Resolution: ±0.1° (C or F)
  • Common mode rejection: 100dB at 50/60Hz
  • Input connections: 2-, 3- or 4-wire
  • Lead resistance effect: 3-wire – 2.5°C per Ω of imbalance, 4-wire – negligible
  • Max lead resistance: 50Ω
  • Automatic linearisation and lead compensation
  • Temperature range of -25°C to +70°C


  • Non-compliant

The D1400 RTD input module is part of the DGH’s D1000 sensor to computer interface data acquisition module family. This input module converts the RTD temperature sensor input signal from the choice of three different RTD types (0.00385, 0.00388 and 0.00392) to digital data, linearises and scales it in °C or °F, and communicates the values using the ASCII protocol to give digital output. The D1400 RTD input module also contains one open-collector digital output (or LO alarm) which may be controlled by the host computer and used to control, for example, solid-state relays. 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 D1400 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 are designed to be compatible with all popular computers utilising RS-232C or RS-485 ports and no software is necessary to start using them, although the utility software is provided. The D1400 can be mounted on a DIN-rail if required (MK-1 mounting kit required) and can be combined with other D1000/D2000 modules to provide complete customised data acquisition system for given application.

  • Analog-to-digital RTD input module
  • Choice of RS-232 or RS-485 output
  • Choice of 3 different RTD types: 0.00385, 0.00388 or 0.00392
  • Communicates using ASCII protocol
  • User-selectable features include °C or °F, baud rate, parity type and others
  • Accuracy: ±0.3°C maximum
  • Resolution: ±0.1°(C or F)
  • Common mode rejection: 100dB at 50/60Hz
  • 2, 3 or 4 wire input connections
  • Maximum lead resistance of 50Ω
  • Excitation current of 0.25mA
  • Input burnout protection to 120Vac
  • Lead resistance effect of 2.5°C per Ω of imbalance for 3-wire option, negligible for 4-wire option.
  • Automatic linearisation and lead compensation
  • 1 open-collector digital output
  • Power requirements: Serial = 0.75W
  • Temperature range -25°C to +70°C

The applications for the D1400 data acquisition modules include:

  • Process monitoring and control
  • Remote data logging to any host computer
  • Product testing
  • Direct connection to modems

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Weight 0.00000 kg
Dimensions 27.94 x 62.23 x 91.44mm
Alpha Value

0.00385 (-200°C to +850°C), 0.00388 (-100°C to +125°C), 0.00392 (-200°C to +600°C)


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Number of Channels



Power Requirements

Series / Model


DGH D1000 & D2000 Technical Library

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:



DGH D1000 & D2000 Series Datasheet
DGH D1000 & D2000 Series User Manual
Command Set Protocol for D1000 Series
  • DGH

DGH D1400 Sensor to Computer Interface RTD Input Module Series

Please be advised that due to the ongoing supply issues with raw materials affecting the global electronics industry, as well as an increase in orders received by our manufacturing partners, a large number of products are facing increased lead times in recent months. For the latest lead time and stock availability, please contact one of our engineers who will be happy to discuss lead times further and the potential for alternative parts.