DGH Corporation, D1452, D1450 Thermistor Input Module, 2252Ohm/RS-485
Features:
- Input protection to 30Vdc
- User selectable degrees C or degrees F
- Two open-collector digital outputs
- One digital input/60 Hz events counter
- D1450M series does not contain Events Counter
- ASCII format command/response protocol
- 500V rms analog input isolation
- 15 bit measurement resolution
- Continuous self-calibration; no adjustments of any kind
- Programmable digital filter
- Digital limit setting and alarm capability
- Digital inputs and outputs connect to solid state relays
- Events counter to 10 million
- Requires +10V to +30Vdc unregulated supply
- Screw terminal plug connectors supplied
The D1450 thermistor input modules contain an isolated 15-bit analog to digital converter and measure thermistor temperature sensors. Thermistors are temperature sensitive resistors that exhibit a predictable change in resistance vs temperature.
The D1450 thermistor input module performs all signal conditioning, analog to digital conversion and linearizes the digital data into scaled temperature values. The temperature values can be scaled in either degrees Celsius or Fahrenheit.
The D1450 thermistor input modules include one discrete digital input and two open-collector digital outputs for monitoring On/Off signals or controlling solid-state relays and annunciators. The digital outputs can also be programmed to operate as HI/LO alarm outputs based on the thermistor temperature.
The digital outputs can be pulled up to +30Vdc and sink up to 30mA without damage. The discrete digital input contains an internal pull up resistor and can accept +/-30Vdc signals without damage. The discrete switching levels are <+1Vdc = logic "0", >+3.5Vdc equals a Logic "1".
The D1450 Thermistor input modules can be mounted on a DIN-Rail using the MK-1 mounting kit.
For more information, please see 
Data Sheet
