Pinouts for RS-232 DB9, DB25 and RJ45 Connectors
2SP-PCI, 2SP-550, DSerial-550, DSerial-PCI, DSerial-PCI/LP, LavaPort-650, LavaPort-PCI, LavaPort-ISA, LavaPort-Plus, LavaPort-PnP, LavaPort-Quad, Octopus-550, Quattro-PCI, SP-PCI, SSerial-550, SSerial-PCI, SSerial-PCI/LP, DataTap-IP, DSerial-PCI 3.3V, DSerial-PCI Powered, Quattro-PCI Powered, Quattro-PCI 3.3V, Quattro-PCI/LP, Ether-Serial Link 1-232-DB9, Ether-Serial Link 2-232-DB9, Ether-Serial Link 4-232-DB9, Ether-Serial Link 4-232-DB9-CBL, Ether-Serial Link 8-232-DB9-CBL, Ether-Serial Link 1-232-RJ45, Ether-Serial Link 2-232-RJ45, Ether-Serial Link 4-232-RJ45, Ether-Serial Link 8-232-RJ45
RS232 DB9 Connector
| DB-9M | Function | Abbreviation |
| Pin #1 | Data Carrier Detect | CD |
| Pin #2 | Receive Data | RD or RX or RXD |
| Pin #3 | Transmitted Data | TD or TX or TXD |
| Pin #4 | Data Terminal Ready | DTR |
| Pin #5 | Signal Ground | GND |
| Pin #6 | Data Set Ready | DSR |
| Pin #7 | Request To Send | RTS |
| Pin #8 | Clear To Send | CTS |
| Pin #9 | Ring Indicator | RI |
-
RS-232 Serial PC Port Connector DB-25
| DB-25M | Function | Abbreviation |
| Pin #1 | Chassis/Frame Ground | GND |
| Pin #2 | Transmitted Data | TD |
| Pin #3 | Receive Data | RD |
| Pin #4 | Request To Send | RTS |
| Pin #5 | Clear To Send | CTS |
| Pin #6 | Data Set Ready | DSR |
| Pin #7 | Signal Ground | GND |
| Pin #8 | Data Carrier Detect | DCD or CD |
| Pin #9 | Transmit + (Current Loop) | TD+ |
| Pin #11 | Transmit - (Current Loop) | TD- |
| Pin #18 | Receive + (Current Loop) | RD+ |
| Pin #20 | Data Terminal Ready | DTR |
| Pin #22 | Ring Indicator | RI |
| Pin #25 | Receive - (Current Loop) | RD- |
-
RS232 RJ45 Connector
| RJ-45 | Function | Abbreviation |
| Pin #1 | Ring Indicator | RI- |
| Pin #2 | Clear to Send | CTS+ |
| Pin #3 | Clear to Send | CTS- |
| Pin #4 | Transmit Data | TD+ |
| Pin #5 | Transmit Data | TD- |
| Pin #6 | Receive Data | RD+ |
| Pin #7 | Receive Data | RD- |
| Pin #8 | Signal Ground/Common | GND |
| Pin #9 | Ring Indicator | RI+ |
| Pin #10 | DC Power I/O | jumper select |