APPENDIX A:
RS232 Adapter Cables

A-5

RTU-to-RTU Synchronous CommunicationUsing Port 3, 4

The pin assignment of the cable to be used for RTU-to-RTU synchronous communication

(using Port 3, 4) is given below.

SITE A

PORT 3

SITE B

TX DATA
RX DATA
RTS
CTS
SIGNAL_GND
TX_CLK
RX_CLK
TX DATA
RX DATA
RTS
CTS
REC_LINE_CD
SIGNAL_GND
TX_CLK
RX_CLK
REC_LINE_CD
1
2
6
3
5
4
7
8
1
2
6
3
5
4
7
8
CONN 8 PIN TEL-PLUG CONN 8 PIN TEL-PLUG
PORT 3