Mechanical And Electrical Installation - RESEARCH CONCEPTS RC2000C Manual

Az/el tracking antenna controller

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Manual (117 pages)

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Table of Contents

RC2000C Az/El Tracking Antenna Controller

3.2

This section covers the mechanical and electrical installation of the unit. Use 4 10-32 mounting screws

to secure the unit to a standard 19" rack. Please refer to figures 3.1, 3.2, and 3.3 for diagrams of the

controller back panel and electrical connections.

In the course of installing the antenna, do not connect an auxiliary power source to the antenna

actuators while the RC2000 is connected to the actuators. When the RC2000 is 'idle' the drive outputs

are shorted together to implement a dynamic brake.

The following electrical connections must be made:

Azimuth and Elevation Motor Drive - 4 wires (2 for each axis)

These cables connect the controller to the azimuth and elevation motors. The conductors must be

sized appropriately so that sufficient voltage is supplied to the motors. The voltage supplied to the

motors will be the output voltage from the controller less the voltage drop caused by the resistance of

the wires.

The output voltage of the controller is a function of the current supplied to the motors. The voltage drop

in the wires connecting the controller to the antenna is determined by the wire size, the wire length, and

the current supplied to the motors. Figure A-1 (appendix H) in the back of this manual shows the

relationship between the controller output voltage and load current.

The following tables show the separation between the controller and the antenna which will result in 28

and 22 volts being applied to the antenna drive motors as a function of motor current and wire gauge.

The tables take into account the controller output loading and resistive losses in the conductors.

Separation (in feet) between controller and antenna which will result in 28 volts being applied to the

motors:

Motor

Current

16 (1.3 sq. mm)

2 Amps

3 Amps

4 Amps

6 Amps

8 Amps

Separation (in feet) between controller and antenna which will result in 22 volts being applied to the

motors:

Motor

Current

16 (1.3 sq. mm)

2 Amps

3 Amps

4 Amps

6 Amps

8 Amps

A typical 36-volt actuator will draw 2 to 4 amps and will run at voltages down to about 12 volts.

Polarotor

- 3 wires in a shielded cable.

A Polarotor

is a servo type device used for polarization control. Note that not all versions of the

controller support polarization control. The Polarotor

conductors are used.

Research Concepts, Inc. • 9501 Dice Lane • Lenexa, Kansas • 66215 • USA

Chapter 3