The D1451M 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. Modules are available to measure either the 2252 Ohm thermistors.
The D1451M module performs all signal conditioning, analog to digital conversion and linearize the digital data. The digital data values are scaled into 16-bit unsigned integer data format that represent a percentage of the full-scale input range. The data values are transmitted to a host computer using the Modbus RTU serial protocol via an RS232 serial port.
0 to +100 C temperature measurement range.