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Page 3–78
2101510 Rev. AG
RS-232
RS-485
RS-422
3
Switched
Power Out
Switched
Power Out
Switched
Power
Out
4
Operate
Operate
Operate
5
Not Used
RRTS
RTS
6
Request To
Send
Bus +
Transmit
Bus +
7
Transmit Data
Bus -
Transmit
Bus -
8
Receive Data
No
Connection
Receive
Bus +
9
Clear To Send
(CTS)
No
Connection
Receive
Bus -
PIN
PORT 2 (J10)
PORT 2
(J10)
PORT 2
(J10)
1
Power Out
Power Out
Power
Out
2
Ground
Ground
Ground
3
Switched
Power Out
Switched
Power Out
Switched
Power
Out
4
Operate
Operate
Operate
5
Not Used
RRTS
RTS
6
Request To
Send
Bus +
Transmit
Bus +
7
Transmit Data
Bus -
Transmit
Bus -
8
Receive Data
No
Connection
Receive
Bus +
9
Clear To Send
(CTS)
No
Connection
Receive
Bus -
TERMINATIONS
PORT 1
(J9)
PORT 2
(J11)
First or Intermediate
Unit (RS-485)
Pins 2–3
Pins 2–3
Last or Only Unit (RS-
485)
Pins 1–2
Pins 1–2
RS-232
Pins 2–3
Pins 2–3