RIO Remote I/O System User Guide
Cable connector pinouts
Page 217
Chapter 3 RIO Cabling information
DB25 female to DB25 female DCE for connection to DTE devices
Typical uses This type of cable is used to connect to DTE de vices such as Terminals, PCs or printers.
Cable diagram
Connector pinout table
Pin 1
(looking into
connector)
Pin 1
(looking into
connector)
DB25 DB25
Pin Signal Direction Description Pin Signal Description
2TXD Out Receive Data 3RXD Transmit Data
3RXD In Transm it Dat a 2TXD Receive Data
4RTS Out Request To Send 5CTS Clear To Send
5CTS In Clear To Send 4RTS Request To Send
6DSR In Data Set Ready 20 DTR Data Terminal Ready
7GND Ground 7GND Ground
8DCD In Data Carrier Detect 8DCD Data Carrier Detect
20 DTR Out Data Terminal Ready 6DSR Data Set Ready