Installation Manual

Figure 6.2: B520 earth ground wiring
Callout ᅳ Description
1 ᅳ B520 Auxiliary Power Supply Module
2 ᅳ 14 AWG - 16 AWG (1.8 mm - 1.5 mm) wire
3 ᅳ Ground device (grounding rod or cold water pipe)
Wire to the control panel
When wiring a module to a control panel, use the terminal strip labeled with PWR, A, B, and
COM for SDI2 IN to wire to corresponding control panel terminals PWR, A, B, and COM.
Use 12 AWG to 22 AWG (2 mm to 0.65 mm) wire.
SDI2 OUT
SDI2 IN
PWR A B COM PWR A B COM
1
2
3
R
Y
G
B
7 COM 8
C
OUTPUT
B
1 k End of Line Resistors
Voltage Ranges
ON-BOARD POINTS
3.7 - 5.0 VDC
2.0 - 3.0 VDC
0.0 - 1.3 VDC
Open
Normal
Short
3 COM 4 5 COM 61 COM 2
R Y G B
SDI2
Device Bus
AUX
- 12 V +
TMPR
1 COM 2 7 COM 83 COM 4 5 COM 6
RESET
COM AUX R Y G B
PWR A B COM
B C
OUTPUT
Figure 6.3: B520 to the control panel wiring (B5512 shown)
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.
6.3.5
Control Panel Power supply | en 35
Bosch Security Systems, Inc. Installation and System Reference Guide 2016.05 | 14 | F.01U.287.180