Functional Devices-RIB RIBT24B Relay

The Functional Devices RIBT24B is a reliable 20 Amp enclosed relay engineered for demanding HVAC and building automation control circuits. This SPDT pilot relay features a dual-coil design, accepting 24Vac/dc power input, making it a versatile component for interfacing thermostat outputs with high-voltage equipment. The NEMA 1 rated enclosure provides a professional finish for field installations, while the 1/2" NPT nipple allows for direct mounting to electrical junction boxes or control panels. As a pre-wired relay, it reduces labor time during installation, ensuring consistent wiring connections for inductive load switching and motor control applications.

Technical performance is centered on the heavy-duty dry contact relay mechanism, rated for 20 Amps at 277Vac. This allows contractors to switch lighting ballasts, electric heat strips, and motors without needing additional power components. The RIBT24B RIB relay includes an onboard LED indicator for immediate visual verification of coil status, simplifying troubleshooting in complex BAS (Building Automation Systems). Its internal Form C relay configuration provides both normally open and normally closed contacts, offering flexibility for interlock and sequencing logic in refrigeration and ventilation sectors.

• High Current Capacity: Rated for 20A resistive loads and 1HP motor loads at 120V, providing robust HVAC relay performance.
• Dual-Input Compatibility: Operates efficiently on 24Vac/dc control signal, eliminating the need for separate relay models.
• Integrated Protection: Enclosed design protects internal components from dust and physical damage in mechanical rooms.
• Installation Efficiency: Pre-terminated leads and nipple mount design facilitate rapid deployment in building automation retrofits.

Can the RIBT24B be used for switching DC loads?
While primary applications involve AC line voltage, the contacts are rated for 20A at 28Vdc, though inductive DC loads may require additional flyback protection depending on the specific application.

How does the LED indicator assist in system diagnostics?
The LED is wired in parallel with the coil; if the LED is illuminated but the load is not engaging, the issue typically lies with the contact side wiring or a tripped circuit breaker rather than the control signal.

Is this relay suitable for outdoor use?
The RIBT24B is housed in a NEMA 1 enclosure designed for indoor environments. For rooftop units or exterior mounting, an UL94-V0 rated NEMA 4X equivalent model should be selected.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.