The normally closed contact is frequently used for electrical interlocking

Engineered for automatic operation

the 755-1 is the manufacturer-specified successor and provides identical electrical and mounting specifications

Nuisance trips are typically caused by restricted airflow

or a major power surge in the line voltage

Functional Devices RIBXKF Sensor The normally closed contact isFor high reliability motor status monitoring and load detection, the Functional Devices RIBXKF is a trade standard solid core current switch engineered for seamless integration into building automation systems. This fixed threshold current sensor triggers at 0. 25 Amps, providing a reliable normally open (N O) solid state contact for HVAC proof of flow and belt loss detection. Designed to handle a sensing range from . 25 150Amp current, the RIBXKF