RIO Remote I/O System User Guide
Cable connector pinouts
Page 213
Chapter 3 RIO Cabling information
DB25 male to DB25 male DTE for connection to DCE devices
Typical uses This type of cable is u sed to connect to DCE devices such as Modems.
Cable diagram
Connector pinout table
Pin 1
(looking into
connector)
Pin 1
(looking into
connector)
DB25 DB25
Pin Signal Direction Description Pin Signal Description
1Chassis Chassis ground 1Chassis Chassis ground
2TXD In Transmi t Data 3RXD Receive Data
3RXD Out Receive Data 2TXD Transmit Data
4RTS In Request To Send 5CTS Clear To Send
5CTS Out Clear To Send 4RTS Request To Send
6DSR Out Data Set Ready 20 DTR Data Terminal Ready
7GND Ground 7GND Ground
8DCD In Data Carrier Detect 8DCD Data Carrier Detect
20 DTR In Data Terminal Ready 6DSR Data Set Ready