Functional Devices RIB02SBDC Relay R-410A This fire thermostat operates as

This fire thermostat operates as a normally closed SPST switch that breaks the circuit on a temperature rise

By eliminating the need for long straight pipe runs

Frequent failures are typically caused by restricted airflow

long-term proportional damper control

Functional Devices RIB02SBDC Relay R-410A This fire thermostat operates asThe Functional Devices RIB02SBDC is a professional grade enclosed relay designed for demanding building automation and HVAC control applications. Featuring a 20A SPST (Normally Open) configuration, this "Relay in a Box" (RIB) is engineered to interface seamlessly with 208 277V power systems. As a dry contact input relay, it allows contractors to utilize Class 2 low voltage circuits from thermostats or BAS controllers to switch high voltage loads