Sonex Trading Co.

When supply voltage is applied, the output relay pulls in after an initialisation period of approx. 3 seconds, provided all thermistors lie below their rated response temperature. • 1 to 9 PTC thermistors with varied rated response temperatures can be connected in series to the input terminals. • If any thermistor resistance increases above trip level, the output relay drops out. After cooling down, a 5 minute time delay is activated, during which the relay remains dropped out. After this period has elapsed the relay pulls in again