Specifications

66 - Connecting Serial Devices DeviceMaster Installation and Configuration Guide: 2000506 Rev. B
Serial Terminal (8) Straight-Through Cables (RS-232/485)
Serial Terminal (8)
Straight-Through
Cables (RS-232/485)
RS-232 or RS-485 straight-through cables are used to connect modems and other DCE
devices.
2E Loopback Signals Use the drawing below to wire a loopback, which is used in conjunction with application
software (Test Terminal or minicom) to test serial ports.
See the NS-Link User Guide for Windows
about using Test Terminal or Using minicom to
Test Comtrol Ports to test the serial ports. Optionally, this information is on the Software
and Documentation CD shipped with the product.
Wire the terminals together to create
a loopback.
•TxD to RxD
•RTS to CTS to RI
• DTR to CD to DSR
RS-232/485 Straight-Through Cable
CD DSR RI DTR RTSTxD RxD CTS
DCD DSR RI DTR RTSTxD RxD CTS
169 72 8
62220 4235
DB9
DB25
3
4
8
or
TRxD-
or
TRxD+
TxD RxDRTS CTSCD DSR RI DTR