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D9412GV2/D7412GV2 | Operation and Installation Guide | 11.0 Arming Devices
54 Bosch Security Systems, Inc. | 5/05 | F01U003641B
You can connect devices to the data bus (Terminals 30
and 31) by parallel wire run from the control panel to
each device, wire from device to device, or a
combination of the two using a maximum of 4572 m
(15000 ft) of 0.8 mm (22 AWG) wire for all devices
connected to the SDI Bus combined.
Wire Limits for Individual Keypads
• Limit most keypads to 610 m (2000 ft) per run.
• Limit D9210B Modules to 457 m (1500 ft) per run
(762 m [2,500 ft] if using an external power
supply).
• Limit D9131A Modules to 305 m (1000 ft) per run.
Extra Power for More Keypads
The D1255 Command Center draws 104 mA when
idle. It draws 206 mA with the keys lit and the sounder
activated. Review Section 6.0 Power Outputs on page 25
to determine the total power output requirements for
the system.
One or more D8132 Battery Charger/Power Supply
Modules can be added for the number of keypads
used. Figure 24 shows the D8132 powering keypads in a
stand-alone configuration.
For UL Certificated accounts, use a UL Listed auxiliary
12 VDC or 24 VDC regulated, power-limited power
supply for Fire Protective Signaling Units and
Commercial or Residential Burglar Units. The D8132
is not UL Listed as a stand-alone power supply.
The control panel and the D8132 (or
other power supply) must share
COMMON.
Figure 24 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 D9412GV2 and D7412GV2
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 24: Power at Keypads
1
2
2
3
3
4
4
5
1 - To control panel
2 - +12 VDC
3 - Data
4 - Common
5 - D8132 or external power supply