Functional Devices RIBMN24S Relay

The Functional Devices RIBMN24S is a high-reliability 2.75" track mount pilot relay designed for seamless integration into building automation systems (BAS) and HVAC mechanical rooms. This 15 Amp SPST relay features a 24 Vac/dc coil, providing versatile control for HVACR equipment, lighting loads, and motor circuits. Engineered for the field, it includes a built-in override switch for manual testing and maintenance, allowing technicians to bypass the controller and verify downstream hardware status instantly. With an LED status indicator that illuminates when the coil is activated, troubleshooting becomes a visual process. The RIBMN24S is rated for a mechanical life of 10 million cycles, ensuring long-term duty in high-demand inductive load switching applications. Its compact snap-track mounting design is compatible with MT212 mounting track, facilitating high-density panel configurations where space is at a premium.

• Universal Input: Operates on both 24 VAC and 24 VDC for maximum compatibility with various DDC controllers and 24V transformers.
• Hand-Off-Auto Control: The integrated override switch simplifies system commissioning and local circuit testing without software overrides.
• High Amperage Rating: Capable of handling 15 Amp resistive loads, making it suitable for larger pilot duty tasks and small motor control.
• Visual Diagnostics: High-visibility LED status indicator provides immediate feedback on relay state for fast on-site diagnostics.
• Space-Saving Design: The 2.75" track-mounted relay module allows for organized, multi-relay installations within industrial control panels.

What is the primary application for the RIBMN24S in HVAC systems?
This relay is typically used for interposing control between low-power BAS analog/digital outputs and higher-current equipment like fans, pumps, or dampers. It protects sensitive controller outputs from back-EMF and high-amperage draw.

Can this relay be used with 0-10V signals?
No, this is a binary (On/Off) pilot control relay triggered by a 24V signal. For 0-10V or 4-20mA modulating signals, a dedicated transducer or an analog-to-relay module would be required.

Does the override switch have different positions?
Yes, it functions similarly to a Hand-Off-Auto (HOA) switch. The "On" position forces the contacts closed (Hand), "Off" forces them open, and "Auto" allows the 24V coil input to control the 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.