Functional Devices RIBMU1S Relay

The Functional Devices RIBMU1S is a high-performance track mount power relay engineered for versatile pilot duty and power switching in HVAC and building automation systems. Built with a SPST-NO (Single Pole Single Throw, Normally Open) contact configuration, this unit is designed to snap directly into 4-inch track systems, significantly reducing installation time in crowded control panels. It features a broad multi-voltage input range of 10V-30V AC/DC or 120V AC, making it a reliable choice for interfacing with digital controllers or mechanical thermostats. Rated for up to 15 Amp resistive loads, the RIBMU1S includes a physical Hand-Off-Auto (HOA) override switch, allowing technicians to manually bypass the controller for system testing or emergency overrides. The dry contact relay setup ensures clean signal isolation for inductive loads, ballast switching, and motor control, maintaining operational stability across residential and industrial applications.

• Flexible Track Mounting: Designed for standard 4-inch track mounting, facilitating clean wire management and quick field replacement.
• Integrated HOA Switch: Features a manual Override Switch (Hand-Off-Auto) for immediate circuit control during commissioning or troubleshooting.
• Universal Input Compatibility: Operates on 10-30 Vac/dc or 120 Vac, eliminating the need for multiple SKUs on the service truck.
• High Current Capacity: Robust 15 Amp relay contacts handle motor loads, lighting ballasts, and heating elements with high reliability.
• Status Indication: Visible LED indicator provides immediate confirmation of the relay coil status.

What are the contact ratings for motor loads?
The RIBMU1S is rated for 1/2 HP at 120 Vac and 1/3 HP at 240 Vac, making it suitable for small fan motors and pump applications.

Can this relay be used with 24VAC control circuits?
Yes, the 10-30V AC/DC input allows it to trigger seamlessly off common 24V secondary transformers found in HVAC equipment.

Does the HOA switch provide feedback to the controller?
This specific model provides local manual override; however, the "Hand" position will bypass the controller command to energize the load regardless of the low-voltage input state.

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.