RC4500 Antenna Controller Chapter 6 Support
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The AIU transmits limit status information back to the RC4500 through low impedance current loops.
These current loops drive the LED portion of opto-isolators in the RC4500. An open circuit between the
RC4500 Limit Switch Feedback opto-isolator and the AIU will result in a limit indication.
When operating correctly, the Normally Closed contact of the Limit Switch will open upon reaching a limit,
which will allow the limit status to indicate on a local control panel of the AIU and will not allow remote or
local commands to move the axis in the direction of the limit.
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