Building Additional Rj45 Loopback Plugs; Building An Rs-485 Test Cable - Comtrol DEVICE MASTER RTS Hardware Installation And Configuration

Building Additional
RJ45 Loopback
Plugs
Building an RS-485
Test Cable
Connecting Serial Devices
Loopback connectors are RJ45 serial port plugs, with pins wired together as
shown, that are used in conjunction with application software to test serial ports.
The DeviceMaster RTS is shipped with a a single loopback plug (RS-232/422).
• Pins 4 to 5
• Pins 1 to 8
• Pins 2 to 6 to 7
Note: Drivers for Windows 98
and Windows NT are
bundled with the Test
Terminal (WCOM32) program. Linux users can use MiniCom. See the NS-
Link driver documentation for your operating system for information about
using these applications.
You can use a straight-through cable as illustrated previously, or build your own
cable.
Signal
TxD or TRX-
RTS or TRX+

Building Additional RJ45 Loopback Plugs

The RS-232 loopback plug also
1 8
Plug
works for RS-422.
Top View
Cable
RJ45
Pins Signal
4
TxD or TRX-
1
RTS or TRX+
17