Functional Devices RIB RIBX24SBF Sensor Relay

The Functional Devices RIBX24SBF is a versatile enclosed current sensing relay designed for reliable load monitoring and control in commercial HVACR environments. This unit features a split core current sensor capable of detecting 0.25 to 20 Amp ranges, paired with an SPDT relay rated for 10 Amps. The RIBX24SBF is engineered with a built-in Hand-Off-Auto (HOA) override switch, allowing technicians to manually bypass the sensor for system testing or emergency operation. With its 24Vac/dc coil voltage and NEMA 1 enclosure, this device is built for direct mounting to electrical boxes or panels, streamlining automation system integration. The pre-wired design and color-coded leads reduce field installation time, making it a preferred choice for fan status monitoring, motor control, and proof-of-flow applications where precision and durability are non-negotiable.

Key Benefits

• Dual-Function Integration: Combines a current transducer and a command relay into a single 120/24 volt compatible housing to minimize wiring complexity.
• Adjustable Trip Point: Features a self-powered current sensor with a simplified threshold adjustment to ensure accurate status feedback across various motor loads.
• Manual Override: Includes a physical HOA switch for immediate local control, essential for troubleshooting BAS controller logic without disconnecting field wiring.
• Compact Form Factor: The NEMA 1 enclosure ensures UL listed safety compliance while fitting into tight mechanical spaces.

Common Questions

How do I calibrate the trip point on the RIBX24SBF?
Adjust the onboard multi-turn potentiometer while the monitored motor is running until the LED status indicator engages. Professional practice is to set the threshold slightly below the normal operating amperage to account for minor voltage fluctuations.

Can this relay be used for proof-of-flow on VFD applications?
Yes, the RIBX24SBF is commonly used to monitor current draw on the load side of variable frequency drives, provided the amperage remains within the 0.25-20A sensing window at the operating frequency.

What is the purpose of the override switch in a networked system?
The Hand-Off-Auto switch allows a contractor to force the relay state 'On' or 'Off' locally, bypassing Building Automation System commands for safe maintenance or functional verification.

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.