The Functional Devices RIB2401SB is a premier enclosed relay engineered for demanding HVACR and building automation environments. This 20 Amp SPST-NO relay features a versatile 24VAC/DC or 120VAC coil, allowing for seamless integration into various control circuits without the need for additional transformers. Built with a continuous duty coil and rated for 10 million mechanical cycles, this RIB relay provides reliable switching for high-inductive loads, including 2 HP motor loads and 20A resistive applications. An integrated override switch allows technicians to manually force the relay "On" or "Off" for critical maintenance or troubleshooting, while the red LED provides an immediate visual status of coil energization. The NEMA 1 plenum-rated enclosure, coupled with a 1/2" NPT nipple, ensures a clean, code-compliant installation directly to any standard electrical knockout, keeping high-voltage and low-voltage wiring properly managed. Key Benefits Dual Coil Input: Supports 24VAC/DC or 120VAC, providing flexibility for diverse field requirements. High Load Capacity: Rated for 20A resistive, 20A ballast, and 2 HP at 277VAC to handle heavy-duty equipment. Manual Override: Features a physical switch for "Hand-Off-Auto" control, essential for system testing. Durable Enclosure: NEMA 1 plenum rating allows for safe installation in ceiling spaces and air-handling units. Pre-Wired Efficiency: Comes with 16-inch 600V rated color-coded leads to reduce installation time and wiring errors. Common Questions What does the red LED indicator signify on the RIB2401SB? The red LED is a status indicator that illuminates when the relay coil is energized. This helps confirm that the control signal is successfully reaching the device during system diagnostics. Can this relay be used for motor control in HVAC systems? Yes, it is specifically rated for motor loads up to 1 HP at 120VAC and 2 HP at 277VAC, making it suitable for exhaust fans, pumps, and small compressors. How do I wire the coil for different voltages? Appropriate wiring is essential: use the White/Black wire for 120VAC input and the White/Blue wire for 24VAC/DC input. Always refer to the internal schematic to ensure the White/Yellow common wire is correctly terminated. 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.
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