CTA-24/230V

Description CTA-24/230V

CTA is an overheating alarm for use in fire monitoring, industrial applications, etc.

CTA can be supplied with 24V AC/DC via terminal 15-16 or 230V AC via terminal 1-2. CTA has two alternating potential-free relay outputs (5A, 250V).

During start-up and when replacing a temperature sensor CTA conducts a self-test. Three bars blink at the lower part of the display. Once the self-test has finished the actual temperature will be displayed. In the case of temperature sensor interruption the code Er0 is displayed and in the case of short-circuit Er1 is displayed.

The alarm reference values for relay 1 are shown in the upper left-hand corner and for relay 2 in the upper right-hand corner of the display. The “greater than” symbol (>), to the left of the alarm reference values, indicates that the relays enter into an alarm condition when the temperature is higher than the alarm temperatures.

If necessary the temperature supply to the CTA can be adjusted. Range: -3.0°C to +3.0°C in steps of 0.1°C.

It is possible to set an alarm delay time (0-120 minutes, factory setting: 0 minutes).

CTA monitors the temperature sensor and deactivates the relays (enters alarm condition) in the event of a short-circuit or interruption in the sensor circuit. In the case of interruption the thermometer sensor shows Er0 and in the case of short-circuit Er1 is displayed.

Installation

CTA is designed for mounting on a DIN rail and is adapted for Norm enclosures.