D7212GV3 | Operation and Installation Guide | 11.0 Arming Devices
46 Bosch Security Systems, Inc. | 10/10 | F01U143079-03
The control panel and the D8132
(or other power supply) must share
COMMON.
Figure 20 shows the common form of the
D8132 Module connected to the common
on the keypad and the common on the
control panel. Any stand-alone power supply,
powering any device connected to the
control panel, must also be connected to a
common terminal on the control panel.
If using the ground fault detection capability
on the D7212GV3 Control Panels with an
external power supply, ensure that the
external selected power supply isolates its
earth ground connection from the negative
side of the auxiliary power output. External
power supplies that do not isolate earth
ground can cause ground fault conditions
on the control panel.
Figure 20: Power at Keypads
1
2
2
3
3
4
4
5
1 - To control panel
2 - +12.0 VDC
3 - Data
4 - Common
5 - D8132 or external power supply
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