B520 BOSCH

Product Overview

The B520 Auxiliary Power Supply Module is a supervised expansion power supply designed to work with compatible control panels over the SDI2 bus. Ideal for industrial, commercial, and institutional applications, the B520 communicates all status changes back to the control panel, ensuring reliable monitoring. Its rotary switches simplify device addressing, while the SDI2 Out terminals provide auxiliary power for expansion devices like keypads. The AUX PWR terminals deliver additional power for devices such as PIR sensors, enhancing overall system capability.

Key Features

• Provides up to 2 A of 12 V standby current for fire or burglar applications (4 A for burglary alarm current)
• Independently supervises up to two 12 V, 7–18 Ah batteries for a total capacity of up to 36 Ah
• Fully supervised expansion device for reliable communication with control panels
• Simplified device addressing via rotary switches
• Auxiliary power output for additional devices and SDI2 expansion modules