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Dual Battery Harnesses
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D122 dual battery harness
Figure 2.3: Wiring a B- or G-Series panel to batteries in the same enclosure with the D122 harness
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Bosch Security Systems, Inc.
Connect the forked terminals (D122L-P1 and D122L-P2) on the D122L to the control
panel terminals.
Connect the D122L harness slip-on spade connectors (D122L-P3 and D122L-P4) to the
terminals on Battery A, observing polarity. The circuit breaker in the harness now
protects the circuit for Battery A.
Connect the D122L harness slip-on spade connectors (D122L-P5 and D122L-P6) to the
terminals on Battery B, observing polarity. The circuit breaker in the harness now
protects the circuit for Battery B.
1 D122-P2 negative lead (black wire)
2 D122-P1 positive lead (red wire)
3 D122 dual battery harness
4 Battery A (12 V)
5 Battery B (12 V)
6 Terminal extenders/splitters
7 D122-P3 positive lead (red wire) to
positive terminal on battery A
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The B-series panel comes either with or without the cover. Each version is wired
identically.
While observing polarity, connect the leads on the control panel battery cable to the
control panel terminals.
Connect the two brass terminal extender/splitters to the terminals on battery A.
Installation Instructions
8 D122-P4 negative lead (black wire) to
negative terminal on battery A
9 D122-P5 positive lead (red wire) to
positive terminal on battery A
10 D122-P6 negative lead (black wire) to
negative terminal on battery B
11 G-Series battery cable
12 G-Series panel in enclosure
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B-Series panel in enclosure
2018.08 | 04 | F.01U.036.370
Installation | en
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