Bosch B308 8-Output Expansion Module with Relays

For commercial and institutional sites that need reliable auxiliary control, the Bosch B308 8-Output Expansion Module delivers eight programmable Form C relays to extend your control panel’s capabilities. This Bosch control panel module lets integrators and facility managers drive HVAC, door lock releases, stairwell pressurization and remote annunciators from a single, centrally managed board. Outputs can be configured to activate on system alarm, system trouble, individual zone or point faults — or triggered remotely by authorized users — providing precise control and reducing manual intervention.

Powered by standard 12V DC and designed for wired connectivity, the B308 offers a compact footprint (5" x 2.9" x 0.6") and installer-friendly addressing to cut installation time. With low power draw and RoHS compliance, it’s well suited for security, surveillance and fire monitoring applications where reliability and integration flexibility matter. Enhance your control panels with dependable, programmable relay outputs that streamline building automation and emergency response. Add the Bosch B308 to your next project to simplify system integration and improve monitoring — contact sales or order now.

• Expand relay capacity for control panels: adds eight Form C outputs to drive HVAC, door releases, annunciators and other auxiliary systems
• Flexible, programmable activation: configure outputs for alarm, trouble, zone faults or remote control to match site logic and reduce false activations
• Simplifies system integration: wired connectivity and standard 12V DC operation make it easy to interface with fire, security and access control systems
• Installer-friendly design: compact 5" x 2.9" footprint with clear switch addressing and modular connectors speeds field wiring and reduces commissioning time
• Improves monitoring and response: centralize auxiliary device control for faster troubleshooting and coordinated actions across surveillance, fire and building systems