Specifications

Serial Link Installation and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
10-6
TABLE 10-1. RS-232C PIN ASSIGNMENTS
The following table is a complete list of RS232 pin assignments for DB25 and DB9 connectors.
(* REPRESENTS MOST USED PINS)
DB25 DB9 FUNCTION DEFINITION DIRECTION
1 * Ground Chassis Ground NA
2 * 3 Data Xfer Transmit Data from DTE to DCE
3 * 2 Data Xfer Receive Data from DCE to DTE
4 * 7 Control Request to send (RTS) from DTE to DCE
5 * 8 Control Clear to send (CTS) from DCE to DTE
6 * 6 Control Data set ready (DSR) from DCE to DTE
7 * 5 Ground Signal ground NA
8 * 1 Control Data carrier detect (DCD) from DCE to DTE
9 Test Data set testing NA
10 Test Data set testing NA
11 - Not assigned NA
12 Control Secondary DCD from DCE to DTE
13 Control Secondary CTS from DCE to DTE
14 Control Secondary transmit data from DTE to DCE
15 Timing Transmit on signal element timing from DCE to DTE
16 Control Secondary receive data from DCE to DTE
17 Timing Received signal element timing from DCE to DTE
18 - Not assigned NA
19 Control Secondary RTS from DTE to DCE
20 * 4 Control Data terminal ready (DTR) from DTE to DCE
21 Control Signal quality detector from DCE to DTE
22 * 9 Control Ring indicator (RI) modem from DCE to DTE
23 Timing Data signal rate selector either
24 Timing Transmission signal element timing from DTE to DCE
25 - Not assigned NA