Making The Connections - RESEARCH CONCEPTS RC2K90INT-1 Manual

given below for the shielded sensor cables. In addition to the motor control signals a pair of individually
shielded triples with drain wires are necessary for the sensor connections.
Please note the following concerning the interconnect cable and sensor connections ...
•
Always use shielded cables for the sensors.
•
The shield drain wire should only be connected at the RC2000.
•
If the cable is spliced, be sure to splice the drain wire.
•
Don't allow the shield or drain wire to come in contact with ground anywhere. If the cable insulation
is cut at a splice put a piece of heat shrink over the frayed shield to keep it from coming in contact with
ground.
•
When splicing the sensor cables please refer to figure 7 in the RC2K90INT-1 manual.
Belden 1083A cable has been successfully used to interconnect the RC2000C to the RC2K90INT-1
interface box. This cable consists of 4 individually shielded triples (or triads). The conductor size is 20
AWG and the shields are equipped with a drain wire. A similar product is available from Olympic Wire
and Cable Corp. (part number 9883).
It also possible to use a pair of satellite TVRO 'actuator cables' to connect the RC2000 to the interface
box. Actuator cable typically consists of a pair 16 AWG unshielded conductors and a shielded 22 AWG
triple with drain wire. This cable is inexpensive and is available from CommScope and others.
The RC2000 to interface box interconnect cable carries DC voltages of 40 volts or less. In the US a direct
burial type cable can be used.

4 Making the Connections

The installation kit includes steel reinforced liquid tight flexible conduit and cabling for connection of the
interface box to the antenna motors, sensors and limit switches. There are 6 straight conduit fittings on the
bottom of the interface box. From the left, these fittings are used for: AC power, the RC2000 interconnect
cable, the elevation motor conduit run, the elevation sensor conduit run, the azimuth sensor conduit run,
and the azimuth motor conduit run.
There are six conduit runs which are used to connect the interface box to the antenna. The following table
describes the conduit fitting types, conduit lengths, and cable types and lengths
Description of Conduit Run
Conduit Run Starting Point
and Conduit
Fitting Type
Azimuth Motor Interface Box,
Straight Fitting
Azimuth Sensor Interface Box,
Straight Fitting
Prodelin 3.8m Antenna Installation Kit
Conduit Length Cable
Type/Length
130 Inches 16/3 - 140 Inches
113 Inches 18/2 - 170 Inches,
Belden 8772 - 124
Inches
21
Conduit Run
Termination
Point and Fitting
Type
Azimuth Motor, 90
Degree Fitting
Azimuth Sensor,
45 Degree Fitting