ABB CM-TCS Temperature Monitoring Relay Function

Function

Measuring principle

The measuring principle is based on the voltage drop across the PT100 sensor,

which is approximately proportional to the change in resistance.

The temperature monitoring relay converts the resistance value to the corresponding threshold value.

Mode of operation

The sensors to be monitored are connected to terminals T1.

T2 and T3 according to the wiring diagrams for 2-wire and 3-wire sensors.

Depending on the setting, the device operates according to the open-circuit principle h

- Measured values fall below or exceed the thresholds Measured values fall below or exceed the thresholds:

Relay energized or closed-circuit principle g

- Measured value below or above threshold: relay de-energized. Relay energized.

All operating states are indicated by the LEDs on the front.