RIO Remote I/O System User Guide
Cable connector pinouts
Page 214
Chapter 3 RIO Cabling information
DB25 female 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
2TXD Out Transmit Data 2TXD Trans mit Dat a
3RXD In Receive Data 3RXD Receive Data
4RTS Out Ready to send 4RTS Ready to send
5CTS In Clear to send 5CTS Clear to send
6DSR In Data Set Ready 6DSR Data Set Ready
7GND Ground 7GND Ground
8DCD In Data Carrier Detect 8DCD Data Carrier Detect
20 DTR Out Data Terminal Ready 20 DTR Data Terminal Ready