The Autronica BSS-103A is a 3 A power supply module designed for AutroSafe fire alarm installations. It converts the incoming mains supply to approximately 27.4 VDC for the fire alarm system and incorporates functions for battery charging, battery testing and mains-failure monitoring. Autronica lists the BSS-103A as an obsolete product.
Key Features
- Provides 27.4 VDC / 3 A output.
- Temperature-compensated battery charging.
- Electronic current limitation during short circuits.
- Reverse-polarity protection.
- Transient protection.
- Provides a dedicated battery load-test output.
- Provides mains-power indication and mains-fault output.
- Adjustable DC output from 22–30 VDC.
- Metal-covered version suitable for external installation.
Typical Applications
- AutroSafe fire detection systems
- Fire alarm control panel power supply
- BS-310 / BS-320 fire alarm installations
- Compatible AutroSafe controller systems
- Battery charging and backup-power arrangements
- Marine and offshore fire alarm systems
- Industrial fire detection installations
- Replacement and maintenance of existing BSS-103A units




