Bosch B9512G Installation And System Reference Manual page 43

Control Panels
Callout ᅳ Description
3 ᅳ Terminal strip wiring
4 ᅳ Interconnect wiring (P/N: F01U079745)
Wire to batteries
Wiring the B520 to BATT 1 is required for proper operation of standby power for the B520
module. Wiring the second battery (BATT 2) is optional. If a B520 is configured for two
batteries as the standby power source, then BATT 2 is also required for proper operation.
BATT 2 must have the same capacity and rating as BATT 1. Maximum standby power cannot
exceed 36 Ah.
Figure 6.5: B520 BATT terminals wiring
Callout ᅳ Description
1 ᅳ B520 Auxiliary Power Supply Module
2 ᅳ Battery 2 (BATT 2) - (12 V nominal lead acid)
3 ᅳ Battery 1 (BATT 1) - (12 V nominal lead acid)
Bosch Security Systems, Inc.
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Power supply | en 43
2016.06 | 08 | F.01U.303.996