Installation Instructions

instructions, and for battery standby time calculations, refer to
the B520 Auxiliary Power Supply Module Battery Standby Chart
within the installation guide.
SDI2 address settings
Notice!
The module reads the address switch setting only during
module power up. If you change the setting after you apply
power to the module, you must cycle the power to the module
in order for the new setting to take effect.
If multiple B520 modules reside on the same system, each B520
module must have a unique address.
Supervision
The control panel supervises B520 Auxiliary Power Supply
Modules on the SDI2 bus.
With any failure to receive an expected response from a B520,
all keypads show a system fault. The control panel sends a
module trouble report to the central station (if configured for
module trouble reports).
Auxiliary power supply trouble conditions
Each auxiliary power supply module on the SDI2 bus monitors
several conditions including AC status, battery status, over
current status, and a tamper input. Each of these conditions
produces a unique system trouble condition at all keypads. The
control panel sends a module trouble report to the central
station (if configured for module trouble reports).
Installation and control panel wiring (B520)
The power supply draws approximately 15 mA (+/- 1 mA) from
the control panel.
Ensure that there is enough power for the module and other
powered devices you want connected to the system.
Refer to On-board outputs, page 28.
4.3.1
4.3.2
4.3.3
4.3.4
Control Panels Power supply | en 23
Bosch Security Systems, Inc. 2015.09 | 08 | F.01U.287.185