Bosch AL400UL-PD4R Fire Power Supply And Charger

This compact indoor wall-mount power supply and charger by Bosch is designed for fire-alarm and security-system applications. When connected to a standard 115 V AC, 60 Hz mains input, it provides either 12 V DC at up to 4 A or 24 V DC at up to 3 A selectable output. The unit distributes this through four Class 2-rated, fuse-protected, power-limited output channels, each filtered and electronically regulated to maintain stable voltage. It includes built-in battery-charging functionality for sealed lead-acid or gel-type standby batteries, and features short-circuit, thermal overload and AC-fail protection, with automatic switchover to battery power should the mains fail. The enclosure is rugged and designed for indoor use; its red finish aids visual identification in fire-alarm system installations.