Electrical Interface; Interface Connector - Comtech EF Data CPA-050 Installation And Operation Manual

C-Band Solid-State Power Amplifier
Remote Control Commands
6.2

Electrical Interface

The remote control interface supports either EIA-485 (2-wire), EIA-485 (4-wire) or
EIA-232. The default port is EIA-485 (2-wire). Selection of the interface type is made
via front panel menu selection. The three interface types are used alternately through the
same 9-pin connector.
EIA-232
EIA-485
6.3

Interface Connector

All three-interface types (2-wire EIA-485, 4-wire EIA-485 and EIA-232C) 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 CPA.
Levels, pulse shapes and impedances conform to EIA standards for asynchronous operation.
Levels, pulse shapes and impedances conform to EIA standards.
Pin Name
2 TD
3 RD
5 GND
6 DSR
7 RTS
8 CTS
EIA-485 (2-Wire)
Pin Name
1 GND
4 +RX/TX
5 -RX/TX
8 +RX/TX
9 -RX/TX
EIA-485 (4-Wire)
Pin Name
1 GND
4 +TX
5 -TX
8 +RX
9 -RX
EIA-232
Function
CPA Transmit Data
CPA Receive Data
Ground
Unit Ready. Always high.
Request to Send (Looped to CTS)
Clear to Send
Function
Ground
Signal Loop In
Signal Complement Loop In
Signal Loop Out
Signal Complement Loop Out
Function
Ground
Transmit Signal
Transmit Signal Complement
Receive Signal
Receive Signal Complement
6-9
Revision 0
MN/CPA-IN.IOM