IDEC Corporation PLC Modules FC6A-J8CU1

The Thermistor Input Module, part number 81Y2277, is designed for use with 24V DC systems and features eight channels for thermistor input. It supports a temperature range of -90 to +150¬8C for NTC thermistors and 100 to 10,000Oc for PTC thermistors. The module has a maximum input impedance of 1 MOc and a detection current of 0.1 mA. It utilizes a sigma-delta type ADC with a digital resolution of 12 bits, providing approximately 2,400 increments for NTC and 9,900 increments for PTC thermistors. The module operates in a self-scan mode and features transformer isolation between input and power circuits, as well as photocoupler isolation between input and internal circuits. The maximum error at 25¬8C is ¬±0.2% of full scale, with a temperature coefficient of ¬±0.01% of full scale per ¬8C. This module is suitable for applications requiring precise temperature monitoring and control using thermistors.