The temperature monitoring relay CM-TCS monitors over-temperature, under-temperature or temperature between two thresholds (window monitoring) via a PT100 sensor.

As soon as the temperature falls below or exceeds the threshold, the output relay changes position according to the configured function and the LED display on the front shows the current status.

All devices are available in two different terminal versions. You can choose between the proven screw connection technology (dual-chamber cage connection terminals) or the completely tool-free easy connection technology (push-in terminals).

Features

Configurable over-temperature monitoring, under-temperature monitoring, temperature window monitoring, etc.

All configurations and adjustments via front-operated elements

Precise adjustment via direct reading scale

One or two thresholds

Hysteresis 2-20 % adjustable

Operating temperature range -40... +60°C

Open or closed circuit principle configurable

Short-circuit monitoring and wire break detection

Screw connection technology or simple connection technology possible

Housing material according to the highest fire protection class UL 94 W-0

DlN rail mounting and dismounting without tools

1 x2 co or 2x1 c/o (SPDT configurable)

22.5 mm (0.89 in) wide

3 LEDs to indicate operating status

Various certifications and approvals (see overview, document no. 2CDC112251D0201)

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.