Functional Devices RIBXKF Sensor

For high-reliability motor status monitoring and load detection, the Functional Devices RIBXKF is a trade-standard solid-core current switch engineered for seamless integration into building automation systems. This fixed threshold current sensor triggers at 0.25 Amps, providing a reliable normally open (N/O) solid-state contact for HVAC proof of flow and belt-loss detection. Designed to handle a sensing range from .25-150Amp current, the RIBXKF eliminates the need for field calibrations, making it an ideal "go/no-go" solution for fractional and high-horsepower motors alike. The enclosed AC sensor features a compact housing that fits easily in tight junction boxes or motor starter enclosures, secured by a removable mounting tab or the integrated ratcheting wire clamp. With 16-inch 18 AWG wire leads rated for 600V, this RIB current sensor ensures a professional, high-voltage-safe installation for contractors monitoring fans, pumps, or industrial loads.

• Fixed 0.25A Trip Point: Simplifies setup by removing the need for manual sensitivity adjustments in the field.
• High Current Range: Monitors conductors carrying up to 150 Amps for versatile application across various motor sizes.
• Solid-Core Reliability: Offers a stable, long-term monitoring solution with no moving parts to fail in high-vibration environments.
• Internal Clamp Design: The ratcheting cam secures the sensor directly to the wire, preventing sliding or disconnection.
• Compact Footprint: Designed to save space within enclosures while providing pre-stripped wire leads for quick termination.

How does this sensor indicate motor failure or belt loss?
The RIBXKF remains in an "open" state until the sensed current exceeds 0.25 Amps. If a belt breaks and the motor loses its load, the current drop—if below the threshold—will cause the switch to open, signaling the controller of a mechanical failure.

Is this sensor compatible with Variable Frequency Drives (VFDs)?
While the sensor can monitor loads powered by VFDs, it is best suited for constant-speed applications. For VFD-driven motors, ensure the operating frequency and current stay consistently above the fixed 0.25A trip point during runtime.

Can I use this for both AC and DC monitoring?
This specific model is an AC current sensor designed for 50/60 Hz circuits. It is not designed to sense DC current or non-sinusoidal waveforms outside of its rated specifications.

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.