providing precise frequency modulation to maintain setpoint stability

making it suitable for modern heat pump systems with expansion in both directions

improving overall fuel efficiency and safety

at which point it opens

Functional Devices RIB2401D-N4 Relay 321894-708 providing precise frequency modulation toThe Functional Devices RIB2401D N4 is a NEMA 4 rated enclosed relay designed for demanding building automation and industrial control applications. This DPDT dry contact relay features a 24Vac dc or 120Vac coil input, providing versatile integration for HVACR sequencers and panel logic. With a 10 Amp contact rating, this pilot relay is built to handle inductive and resistive loads in environments where moisture, dust, or outdoor exposure is a concern.