Comtrol DEVICE MASTER RTS - RTS Connector Pinouts; DB9 Connector Pinouts; Building Additional DB9 Loopback Plugs; RJ45 Connector Pinouts

Connecting Serial Devices 16
RTS Connector Pinouts
RTS Connector Pinouts
Use the appropriate subsection if you need information about the serial connectors
on the RTS, including:
• Signal information for each communications mode.
• How to build a loopback plug or cable to test a port.
DB9 Connector
Pinouts
Use the following pinout information for the DB9 serial port connectors on the
DeviceMaster RTS.
Building Additional
DB9 Loopback Plugs
Loopback connectors are DB9 female 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).
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.
Wire the following pins together to build additional plugs or replace a missing RS-
232 loopback plug:
• Pins 1 to 4 to 6
•Pins 2 to 3
• Pins 7 to 8 to 9
Wire the following pins together for an RS-422 loopback plug:
•Pins 2 to 3
•Pins 7 to 8
RJ45 Connector
Pinouts
Use the following pinout information for the RJ45 serial port connectors on the
DeviceMaster RTS.
Pin 1
Pin 6
DB9 Male
RS-232
RI
CTS
RTS
DSR
GND
DTR
TxD
RxD
CD
Pin 1
Pin 6
DB9 Male
RS-422
Not used
RxD+
TxD+
Not used
Not used*
Not used
TxD-
RxD-
Not used
Pin 1
Pin 6
DB9 Male
RS-485
Not used
Not used
TxD/RxD+
Not used
Not used*
Not used
TxD/RxD-
Not used
Not used
* Pin 5 is tied to ground on the board,
but is not used in the cable.
Pin 1
Pin 5
Pin 6
Pin 9
RS-232 Only
(Back View)
The RS-232 loopback plug
also works for RS-422.
Pin 1
Pin 5
Pin 6
Pin 9
RS-422 Only
(Back View)
RS-232
RTS
DTR
Signal GND
TxD
RxD
DCD
DSR
CTS
Pin 1
RJ45
RS-422
TxD+
Not used
Not used**
TxD-
RxD-
Not used
Not used
RxD+
Pin 1
RJ45
RS-485
TxD/RxD+
Not used
Not used**
TxD/RxD-
Not used
Not used
Not used
Not used
Pin 1
RJ45
** Pin 3 is tied to ground on the board,
but is not used in the cable.