Description
The Functional Devices RIBTW24B-BCAI is a BACnet-enabled relay designed for modern building automation and HVAC control applications. Combining a robust 20-amp relay output with a 24V control voltage and an onboard analog input, this unit allows facility managers and controls technicians to integrate relay switching directly into a BACnet MS/TP network — eliminating the need for separate relay panels and simplifying wiring.
Key Features
- BACnet MS/TP communication protocol for seamless integration into building automation systems
- 20A relay output for controlling loads such as fans, pumps, and HVAC equipment
- 24V AC/DC control voltage for compatibility with standard HVAC control circuits
- Onboard analog input (AI) for monitoring sensors such as temperature, humidity, or pressure transmitters
- Compact, enclosed housing suitable for panel or enclosure mounting
- Status LED indicator for quick visual confirmation of relay state
- Configurable BACnet device instance and MS/TP address via onboard DIP switches
Building Automation Integration
The RIBTW24B-BCAI communicates natively over BACnet MS/TP, making it an ideal fit for commercial HVAC systems managed by BACnet-compatible controllers and building management systems (BMS). The integrated analog input expands the device’s capability beyond simple switching, enabling sensor data to be read and reported directly over the network without additional I/O modules.
Applications
- Fan and pump relay control in commercial HVAC systems
- BACnet-networked relay switching for AHUs, RTUs, and VAV systems
- Analog sensor monitoring (temperature, pressure, humidity) via BACnet
- Retrofit and new-construction building automation projects
- Lighting and equipment control in BMS-integrated facilities
Why Choose the RIBTW24B-BCAI
Functional Devices has long been a trusted name in relay-in-a-box solutions for the HVAC and building automation industries. The RIBTW24B-BCAI delivers the reliability and flexibility that controls contractors demand, with native BACnet communication and analog input capability packaged in a proven, field-ready enclosure.









