D268/D269 Independent Zone Control, D279A Independent Zone Control; Figure 19: Power At Command Centers - Radionics D9412G Operation And Installation Manual

Control/communicators

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Table Of Contents

Table of Contents

D9412G/D7412G

Arming Devices

Panel

Switching the green and yellow wires affects other command centers: Incorrectly connecting the green wire

from the command center to Terminal 31 and the yellow wire to Terminal 30, causes other command centers

connected to the panel to go blank and/or sound random beep tones.

Devices can be connected to the data bus, Terminals 30 and 31, by parallel wire runs from the panel to each

device, wire from device to device, or a combination of the two as long as a maximum of 15,000 ft. (4,572 m) of 22

AWG wire for all devices connected to the SDI Bus combined is used.

It is recommended, however, that command centers be limited to 2,000 ft. (610 m) per run; D9210B Modules be

limited to 1,500 ft. (457 m) per run (2,500 ft. [762 m] if using an external power supply), and the D9131A be limited

to 1,000 ft. (305 m) per run.

Extra power needed for more command centers: The D1255 Command Center draws 104 mA when it is idle. It

draws 206 mA with the keys lit and the sounder activated. Review section 5.0 Power Outputs to determine the total

power output requirements for the system.

One or more D8132 Battery Charger/Power Supply Modules may need to be added for the number of command

centers that will be used. Figure 19 shows the D8132 powering command centers in a stand-alone configuration.

For UL certificated accounts use a UL listed power supply. The D8132 is not UL listed as a stand-alone power

supply.

Control/Communicator and D8132 (or other power supply) must share COMMON: Note that Figure 19

shows the common from the D8132 Module connected to both the command centers' common and the

common on the control/communicator. Any stand-alone power supply powering any device connected to the

panel must also be connected to a common terminal on the panel.

If you are using the Ground Fault Detect capability on the D9412G or D7412G Control/Communicators and

an external power supply, make sure that the external power supply selected isolates its Earth Ground

connection from the negative side of the Aux Power output. External power supplies that do not isolate Earth

Ground will cause ground fault conditions on the Control/Communicator.

10.3