Bosch D122, Installation Instructions Manual

Dual Battery Harnesses

Installation | en

7

Bosch Security Systems, Inc.

Installation Instructions

2018.08 | 04 | F.01U.036.370

1.

Connect the forked terminals (D122L-P1 and D122L-P2) on the D122L to the control
panel terminals.

2.

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.

3.

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.

D122 dual battery harness

Figure

2.3: Wiring a B- or G-Series panel to batteries in the same enclosure with the D122 harness

1 D122-P2 negative lead (black wire)

8 D122-P4 negative lead (black wire) to

negative terminal on battery A

2 D122-P1 positive lead (red wire)

9 D122-P5 positive lead (red wire) to

positive terminal on battery A

3 D122 dual battery harness

10 D122-P6 negative lead (black wire) to

negative terminal on battery B

4 Battery A (12

V)

11 G-Series battery cable

5 Battery B (12

V)

12 G-Series panel in enclosure

6 Terminal extenders/splitters

13

1

B-Series panel in enclosure

7 D122-P3 positive lead (red wire) to

positive terminal on battery A

1

The B-series panel comes either with or without the cover. Each version is wired
identically.

1.

While observing polarity, connect the leads on the control panel battery cable to the
control panel terminals.

2.

Connect the two brass terminal extender/splitters to the terminals on battery

A.