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3.2 Electrical Installation
In this section wiring instructions are discussed for the various setup capabilities of the
Base Radio. The subsections are as follows:
3.2.1 Electrical Specifications
3.2.2: Wiring Power to the Base Radio
3.2.3 Wiring RS-485 to the Base Radio
3.2.4 Wiring the RS-485/232 Converter to the Base Radio
3.2.5 Wiring the RS-485/USB Converter to the Base Radio
3.2.6 Daisy-Chaining Multiple Base Radios to Single RS-485/Power
3.2.7 Terminating Communications Wiring to the Base Radio
3.2.8 Grounding the Base Radio
3.2.9 High Gain Antenna
Warning! Remember to turn off all power BEFORE attaching the Base
Radio wires!
3.2.1 Electrical Specifications
24VDC Power Supply with 0.5 Amp minimum output •
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Recommend 22AWG Power Supply wire
2 Wire RS-485 Serial Communications Cable
Recommend Belden 3105A shielded and protected 22AWG or equivalent
120 Ohm, ± 5%, ¼ W resistor for RS-485 termination
RS-485 to RS-232 converter B&B model 485LDRC9 or equivalent
8 AWG bare or green covered grounding cable for housing ground
In Figure 3-2, an overall wiring schematic is shown. Note that the grounding screw is
located on the outside of the Base Radio housing.
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