DB-25 Connector
The following figure and table give the pin locations and descriptions of the DB-25 connector, which is on the optional 10-position modular jack to DB-25 cable.
DB-25 Connector Pin Locations
DB-25 Pin Descriptions
| DB-25 Pin | 232 Signal | 485 Signal |
|---|---|---|
| 2 | TXD | RTS+ (HSO+) |
| 3 | RXD | CTS+ (HSI+) |
| 4 | RTS | RTS– (HSO–) |
| 5 | CTS | TXD+ |
| 6 | DSR* | CTS– (HSI–) |
| 7 | GND | RXD– |
| 8 | DCD* | GND |
| 20 | DTR* | RXD+ |
| 22 | RI* | TXD– |
Pins not listed in this table are No Connect.
* These signals are "No Connect" on the isolated 232 ports.
The following figure shows how to connect the cables when you install a four-port PXI serial board.
