RC4500 Antenna Controller Chapter 6 Support
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6.0 SUPPORT
6.1 Troubleshooting
This section provides tips for debugging typical problems. There are many interfaces between the
RC4500 and position sensors, limit switches, mechanical components of the mount, other satellite
equipment, etc. Some problems are due to interactions that are not readily apparent. Review all of the
troubleshooting sections to see if a situation similar to yours is described.
6.1.1 Limit Switches
The various limit switches serve as safety interlocks to prevent mount damage. The RC4500 checks for
limit conditions via both software and a Programmable Logic Device. The limit switches connect directly
to the Antenna Interface Unit via the relay board. Each limit switch has a normally closed set of contacts
(limit switch opens at the limit.) The following diagram is a representation of a single limit switch
interfaced to the Antenna Interface Unit and to the RC4500 Antenna Control Unit.
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