Research Concepts RC2500 - Manual (Page 118)

RC2500 Antenna Controller Replacing the RSI/ Satcom 4010 111
Research Concepts, Inc. • 5420 Martindale Road • Shawnee, Kansas 66218-9680 • USA www.researchconcepts.com
Appendix J – Replacing the RSI/ Satcom 4010 Controller
It is possible to use the RC2500 to replace the RSI/ Satcom Technologies 4010 Antenna Controller and
enjoy the added capabilities of inclined-orbit tracking and PC remote control. In order to be compatible
with the Antenna and 4020 outdoor box, resolvers are placed on the azimuth and elevation pivot points, a
potentiometer is installed to sense polarization position (See Appendix H above), and several RC2500
modifications both hardware and software are performed at the factory. The firmware version for this unit
is: version 1.07wra-p, the date: 3.17.98, and the checksum: '34'.
The 4020 has 5VDC isolated limit switch outputs that are directly compatible with the inputs of the
RC2500 using the Standard I/O board with isolated inputs (7134 version). The limit “+” terminal of the
4020 is connected to the limit input and the limit “-“ terminal of the 4020 is connected to the limit return
line. The “safe” operating region is defined as the non- conducting state of the drivers. That is a pull-
down occurring on the limit return line (5VDC is always on the limit input) of the RC2500 input terminal
indicates a limit has been reached. A high voltage (+5VDC) on the limit return line indicates that a limit
has not been reached. Note that this is different from other control schemes where the conducting state
indicates the safe operating region. A software modification has been performed to compensate for the
inversion. All six positional limits operate in this manner.
A seventh input, Auto/Man, lets the RC2500 know whether the antenna is being jogged under local
control at the base-mounted 4020 A.I.U. Again, this is a pull-down on the Maintenance Status Return line
with +5VDC always on the Maintenance Status Input line. When Manual Mode (RC2500 to be disabled)
is active, this driver is non-conducting, the voltage on the maintenance status return line would be high
(+5VDC), and the RC2500 will indicate “MAINTENANCE” flashing on the lower line of the display.
The Standard pin-out information found in section 3.3.2.1 is applicable for this version with the exceptions
described below. In order for the Internal drive system to function, the Maintenance input of the RC2500
must be powered by a voltage between 17 and 24 VDC. A jumper is connected externally from J6 pin 25
to J7 pin 24 to facilitate this. This circuit is completed by using an external jumper to connect the Drive
Common line to Vunreg return. (J7 pin 8 to J6 pin13). The ESTOP circuit was disabled by wiring The
ESTOP input to Vunreg (+24VDC) and the ESTOP return line to Vunreg return. (jumper J7 pin 19 to J6
pin 25 and then jumper J7 pin 16 to J6 pin 13). Both Drive fault lines are disabled by connecting U8 pin
12 to U8 pin 11 and connecting U8 pin 13 to U8 pin 14.