Unit installation

Introduction RSU-503 Redundancy Switch Unit
1–2 Rev. 8
1.1 Overview
The switch is a fully automated 1:1 protection switch designed to work with the
following EFData Radio Frequency Terminals (and their amplifiers):
• RFT-500
• RFT-505
• RFT-700
• RFT-705
• RFT-1200 (for RSU-503L information, refer to Appendix A)
• RFT-1225 (for RSU-503L information, refer to Appendix A)
• KST-2000 (for RSU-503L information, refer to Appendix A)
Note:
All references in this document to “RFT” apply to all the models listed above.
The switch has a weather resistant enclosure which houses the indicators and controls to:
• Switch RFTs and LNAs
• Command the waveguide switch to toggle
Specifically, the switch performs the following functions:
•
Controls waveguide/coaxial switch positions
•
Provides independent uplink and downlink paths
•
Routes the IF input to the online RFT
•
Routes the IF output from the online RFT
•
Initiates a switch-over in Auto mode by monitoring RFT faults
•
Supplies test ports for testing the standby channel
•
Receives RS-232/485 serial commands, routing them to the appropriate RFTs,
and returns their responses
•
Receives its own RS-232/485 command set for Auto/Manual mode, A/B online,
and address select
• Provides FORM-C relay contacts for Summary Fault status
Power is supplied by one or both RFTs.