Comtech EF Data KPA-020IN, Installation And Operation Manual

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Ku-Band Solid-State Power Amplifier Revision 0
Remote Control MN/KPA.IOM
6-2
6.2 Electrical Interface
The remote control interface supports either RS-485 (2-wire), RS-485 (4-wire ) or
RS-232. The default port is RS-485 (2-wire). Selection of the interface type is made
via front panel menu selection. The three interface types are impletemented alternately
through the same 9-pin connector.
RS-232
Levels, pulse shapes and impedances conform to EIA standards for asynchronous operation.
RS-485
Levels, pulse shapes and impedances conform to EIA standards.
6.3 Interface Connector
All three interface types (2-wire RS-485, 4-wire RS-485 and RS-232) are implemented
alternately through the same 9-pin connector. The remote control port is a female DB-9
connector located on the rear of the KPA.
RS-232
Pin Name Function
2 TD KPA Transmit Data
3 RD KPA Receive Data
5 GND Ground
6 DSR Unit Ready. Always high.
7 RTS Request to Send (Looped to CTS)
8 CTS Clear to Send
RS-485 (2-Wire)
Pin Name Function
1 GND Ground
4 +RX/TX Signal Loop In
5 -RX/TX Signal Complement Loop In
8 +RX/TX Signal Loop Out
9 -RX/TX Signal Complement Loop Out
RS-485 (4-Wire)
Pin Name Function
1 GND Ground
4 +TX Transmit Signal
5 -TX Transmit Signal Complement
8 +RX Receive Signal
9 -RX Receive Signal Complement