Firecom 5000D Series Installation & Operation Manual page 15

IMPORTANT: The Modular Jack marked "1" is the Priority Transmit Position. The Headset plugged into this jack will
have priority over all other Headsets for transmitting on the radio.
POWER & GROUND CONNECTIONS:
Before making the power connections, make sure the apparatus master switch is OFF!
IMPORTANT: Connect the Power Cable Assembly (Figure 14) to rear of the Intercom Unit.
Connect the black wire (from pin 1) to the vehicle's negative ground, or use the supplied self-tapping screw and star
washers as shown in Figure 14.
IMPORTANT: Firecom recommends connecting the Intercom power connections to the vehicles power buses
(preferably, to the same point that the 2-way radio is connected)
1. Connect the red wire (from pin 2) to one end of the supplied in-line fuse holder.
2. Connect the other end of the fuse holder to the vehicle's switched positive power supply.
3. The 5000D Series Intercom System is installed and ready for connection to the radio.
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FIGURE 13: Modular Jacks
FIGURE 14: Power Cable Assembly