Comtech EF Data RC-1160 - Manual (Page 29)

Installation Revision 1
RC-1160 RC-1260 Redundancy Switch Controllers MN-RC1160RC1260
2–7
2.4.3 EIA-485/-232 Serial Connector, J3
The serial connector is a 9-pin miniature D connector socket (refer to Table 2-3 for connector pinouts). EIA-485
signal is 0 to 5V; EIA-232 signal is ± 11V. The connector is compatible with any 9-pin miniature D connector
plug.
NOTE: When strapped for EIA-232 operation, CTS is tied to RTS in the RC-1160/-
1260.
Table 2-3. EIA-485/-232 Serial Connector, J3
Pin # EIA-485 EIA
1 GND
2 TD (TX)
3 RD (RX)
4 +RX/TX
5 -RX/TX GND
6 Data Set Ready (DSR), Tied High
7 Ready to Send (RTS) (See note)
8 +RX/TX Clear to Send (CTS) (See note)
9 -RX/TX