RESEARCH CONCEPTS RC1500B Manual page 20

14
RC1500B Single Axis Tracking Antenna Controller
Separation (in feet) between controller and antenna which will result in 28 volts being applied
to the motors:
Wire Size →
16 AWG
Motor Current ↓
2 amps 600
3 amps 340
4 amps 220
6 amps 90
8 amps 30
Separation (in feet) between controller and antenna which will result in 22 volts being applied
to the motors:
Wire Size →
16 AWG
Motor Current ↓
2 amps 970
3 amps 580
4 amps 400
6 amps 220
8 amps 120
A typical 36 volt actuator will draw 2 to 4 amps and will run at voltages down to about 12
volts.
3.2.2 Position Sense
Shielded cable with a bare drain wire MUST be used to minimize noise pickup. The
conductors that interface the controller to the sensor is often incorporated into a cable that
includes the motor drive conductors. If discreet sensor cable is required, Belden 8772
(consisting of three 20 AWG conductors enclosed in a foil shield with a bare drain wire) can be
employed.
Position count errors resulting from improper shielding is the most frequent problem that
occurs during the installation of the RC1500. Please observe the following precautions ...
1. A shielded cable equipped with a bare drain wire must be used to interface the controller to
the position sensor.
2. The drain wire that provides an electrical connection to the shield must be connected to the
J1-6 terminal labeled Sensor AZ -. The Sensor AZ – terminal is at ground potential. The
shield must not be allowed to come in contact with earth potential at any other location.
3. At the sensor the shield must be left open. A short piece of heat shrink tubing can be
employed to insulate an frayed foil shielding from any metal objects at the sensor. If the
shield is allowed to come in contact with earth ground at the antenna ground currents could
flow in the shield which could induce noise in the sensor input circuitry.
Research Concepts, Inc.; 5420 Martindale; Shawnee, KS 66218
Chapter 3
14 AWG 12 AWG
950 1500
520 830
340 550
140 230
40 70
14 AWG 12 AWG
1530 2430
920 1460
640 1020
340 550
190 310
Installation/Setup
10 AWG
2410
1350
880
340
120
10 AWG
3930
2370
1650
880
500
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