Functional Devices RIBU2SC Relay

The Functional Devices RIBU2SC is a high-performance, enclosed pilot control relay engineered for demanding HVAC and building automation applications. Designed as a “Relay in a Box,” this 10 Amp unit features a multi-voltage coil that accepts 10-30 Vac/dc or 120 Vac, offering unmatched field versatility for contractors. The RIBU2SC is uniquely configured with one SPST-NO (Normally Open) contact and one SPDT (Single Pole Double Throw) contact, allowing for simultaneous control of multiple loads or feedback loops from a single trigger. A built-in override switch provides immediate manual control, essential for system testing and emergency bypass. Housed in a durable, plenum-rated NEMA 1 enclosure, the unit includes 16-inch 600V rated color-coded wire leads and a 1/2" NPT nipple for rapid, secure installation into standard electrical knockouts. This dry contact relay is an industry standard for interfacing low-voltage controllers with high-voltage equipment, ensuring reliable electromechanical switching with an expected life of 10 million mechanical cycles.

• Versatile Coil Input: Eliminates the need for multiple stocked parts by supporting 10-30 Vac/dc and 120 Vac applications.
• Dual Relay Configuration: Integrated SPST-NO and SPDT contacts provide flexible switching logic for complex HVAC control sequences.
• Manual Override: Features a physical HOA switch (Hand-Off-Auto) for local control during commissioning or maintenance.
• Contractor-Friendly Install: Pre-wired with color-coded leads in a compact, nipple-mountable UL Listed enclosure.
• Status Visibility: Integrated LED indicator provides instant visual verification of relay activation.

What is the maximum contact rating for the RIBU2SC?
The relay contacts are rated for a 10 Amp resistive load at 277 Vac, 480 VA pilot duty, and up to 1/3 HP at 120-240 Vac.

Can the RIBU2SC be used in plenum spaces?
Yes, the housing is plenum-rated and carries a NEMA 1 rating, making it suitable for mounting inside of or attached to ductwork and other air-handling spaces.

How do I wire the RIBU2SC for a 24V signal vs. a 120V signal?
The unit features dedicated leads for different voltages: use the White/Blue pair for 10-30 Vac/dc inputs or the White/Black pair for 120 Vac inputs. Always cap unused leads.

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.