Installation Manual

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 60.
!
Caution!
Remove all power (AC and battery) before making any connections. Failure to do so might
result in personal injury and/or equipment damage.
Install the module
1. Set the module address using the address switches before you install it in the enclosure.
2. Insert the plastic mounting clips onto the appropriate standoff locations inside the
enclosure or on a mounting skirt, when required.
3. Mount the module onto the plastic mounting clips and then secure it using the supplied
mounting screws.
Wire to earth ground
To help prevent damage from electrostatic charges or other transient electrical surges,
connect the system to earth ground before making other connections. Recommended earth
ground references are a grounding rod or a cold water pipe. When grounding, run wire as
close as possible to grounding device.
!
Caution!
Do not use telephone or electrical ground for the earth ground connection. Use 14 AWG (1.8
mm) to 16 AWG (1.5 mm) wire when making the connection.
6.3.2
6.3.3
6.3.4
34 en | Power supply Control Panel
2016.05 | 14 | F.01U.287.180 Installation and System Reference Guide Bosch Security Systems, Inc.