Serial Terminal (8) Straight-Through Cables (Rs-232/485); Loopback Signals - Comtrol DeviceMaster PRO Installation And Configuration Manual

Serial Terminal (8) Straight-Through Cables (RS-232/485)

Serial Terminal (8)
Straight-Through
Cables (RS-232/485)
2E Loopback Signals
66 - Connecting Serial Devices
RS-232 or RS-485 straight-through cables are used to connect modems and other DCE
devices.
CD
DCD DSR
DB9
DB25
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
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
DSR RI DTR TxD
RI DTR TxD
or
TRxD-
1 6 9 4 3
8 6 22 20 2
about using Test Terminal or
CD DSR
DeviceMaster Installation and Configuration Guide: 2000506 Rev. B
RTS RxD CTS
RTS RxD CTS
or
TRxD+
7 2 8
4 3 5
Using minicom to
RI DTR TxD RTS RxD CTS