RESEARCH CONCEPTS RC2K90INT-1 Manual page 2

1. Introduction
This document describes a family of products that allow an RC2000 antenna controller to interface with
antennas powered by either 90 or 180 volt DC motors (RC2K90INT-1 and RC2K90INT-2) or other motor
types (RC2KINT). The RC2000 antenna controller is designed to interface directly with antennas which
employ 36-Volt DC motors (8 amps maximum) and single phase pulse type position sensors. When the
RC2000 is used with antennas powered by other types of motors an interface box is required.
Three unique interface box configurations are available from Research Concepts. These configurations are
designated RC2K90INT-1, RC2K90INT-2, and RC2KINT. All versions of the interface are housed in
NEMA 4 type enclosures that are suitable for outdoor mounting.
RC2K90INT-1 and RC2K90INT-2 Interface Boxes
The RC2K90INT-1 and RC2K90INT-2 interface boxes are designed to interface with either 90 volt or 180
volt DC motors. The RC2K90INT-2 interface box employs a pair of DC motor drive modules and
supports simultaneous movement about the antenna's azimuth and elevation axis. The RC2K90INT-1
interface box employs a single DC motor drive module and simultaneous azimuth and elevation movement
is not supported.
The DC motor drive modules used in these interface boxes provide dynamic braking of the motors and are
available in either 120 or 240 VAC input voltage versions. The following table gives the maximum motor
horsepower as a function of AC input voltage and motor voltage.
Input Voltage
120 Volts AC
240 Volts AC
220 Volts AC
When ordering an RC2K90INT-1 or an RC2K90INT-2 interface box please specify the AC line voltage,
the DC motor voltage and the motor horsepower, and whether two-speed operation, described later in this
section, is required.
RC2KINT Interface Box
The RC2KINT interface box consists of the 2K90INT-2 circuit board mounted in a NEMA 4 type box.
The circuit board provides uncommitted relay contact closures to activate motor drive control devices
provided by the user.
Polarization Control
The RC2000 antenna controller is designed to directly interface with three wire servo type polarization
control devices. An optional daughter board (designated RC2KPOL) can be installed on most RC2000
models which provides an interface to a 24 volt DC polarization control motor (400 ma) which uses a
potentiometer for position sense feedback. The RC2KPOL daughterboard is compatible with many Seavey
Engineering rotating feeds. All of the interface boxes described here provide contact closures which can
be used to provide polarization control for antennas which use motors other than 24 volts DC. For these
applications it is necessary to install the optional RC2KPOL daughter board in the RC2000 antenna
controller. Please contact Research Concepts for more information.
Motor Voltage
90 Volts DC
90 Volts DC
180 Volts DC
2
RC2000 Antenna Controller Interface Box
Maximum Motor Horsepower
1 1/2 horsepower
1 1/2 horsepower
3 horsepower