Installation Instructions

Callout ᅳ Description
1 ᅳ Control panel
2 ᅳ B520 Auxiliary Power Supply Module
3 ᅳ Terminal strip wiring
Powered device and battery wiring
Wire to SDI2 powered devices
When wiring the output of a B520 to a SDI2 module, you can use
either the SDI2 OUT terminal strip labeled with PWR, A, B, and
COM to wire to terminals labeled PWR, A, B, and COM on the
next module, or you can use the interconnect cable (included).
Wiring the output of a B520 to a SDI2 device provides power to
the device while passing through data between the control
panel and the device.
PWR A B COM
2
4
PWR A B COM
SDI2 OUT
SDI2 IN
PWR A B COM PWR A B COM
1
2
3
SDI2 OUT
SDI2 IN
PWR A B COM PWR A B COM
1
R Y G B
Figure 4.4: B520 to powered devices - terminal strip or interconnect
wiring connector
Callout ᅳ Description
1 ᅳ B520 Auxiliary Power Supply Module
2 ᅳ Powered device (SDI2 module)
4.3.5
26 en | Power supply Control Panels
2015.09 | 08 | F.01U.287.185 Bosch Security Systems, Inc.