Field Control Thermocouple Input Module | GE IC670ALG630-CA

The GE IC670ALG630-CA is an 8-channel thermocouple analog input module designed for distributed I/O architecture within the GE Field Control system. Serving as a high-density, isolated analog processing interface, the IC670ALG630-CA monitors temperature signals across eight independent channels and transmits converted digital values to the host controller via a Bus Interface Unit.

Signal Processing and System Power

The module accepts various standard thermocouple sensor types, converting low-voltage millivolt signals into 16-bit signed integer values. It features self-calibration upon power-up to maintain measurement consistency. The module draws 195 mA of internal power from the backplane power supply provided by the connected Bus Interface Unit.

Diagnostics and Status Indication

Integrated visual status reporting includes green and amber LEDs located on the front panel to indicate operating status and fault conditions. The unit automatically monitors system integrity, detecting channel conditions such as open thermocouples, over-range/under-range signals, and high/low threshold alarms.

Frequently Asked Questions

Q: How does the IC670ALG630-CA receive internal power?A: The module draws its required internal operational current of 195 mA directly from the Field Control Bus Interface Unit backplane.

Q: What fault conditions can the module detect on its input channels?A: The module detects conditions such as open thermocouples, input signals exceeding high or low range limits, and configured alarm threshold violations.