Bosch B308

The Bosch B308 is an eight-output expansion module designed to extend control capabilities of fire alarm and security system control panels through programmable relay outputs. This SDI2-bus expansion module provides eight independent Form C dry contact relays, each rated for 1.0 ampere at 5-24 VDC, enabling activation of auxiliary systems such as HVAC shutdown, automatic door lock release, stairwell pressurization, and remote annunciators. The module's flexible programming allows each relay output to be triggered by system alarm conditions, individual zone faults, system trouble events, or through authorized remote control commands, providing comprehensive integration with building management and life-safety infrastructure.

Key Features

• Eight programmable dry contact relay outputs for auxiliary system control
• SDI2 bus compatible for direct integration with Bosch control panels
• Form C relay contacts (1.0 A rated at 5-24 VDC) for low-voltage switching applications
• Flexible programming for alarm, trouble, zone-specific, or remote-triggered activation
• Screw terminal connections for secure field wiring
• On-board address switches for SDI2 module addressing and configuration

Technical Specifications

• Output Type: 8 Form C dry contact relays
• Relay Rating: 1.0 A at 5-24 VDC
• Connection: Screw terminal block for field wiring
• Bus Interface: SDI2 (Secure Device Interface 2)
• Addressing: On-board switches for module address configuration
• Activation Triggers: System alarm, zone faults, system trouble, remote commands

Certifications

• Bosch Security SDI2 module standard compliance
• UL Listed for fire alarm system integration