DeviceMaster LT User Guide
: 2000586
Rev. B
Connecting Serial Devices - 65
Connecting Serial Devices
This section discusses connecting your serial devices to the DeviceMaster LT. It
also provides you with information to build serial cables and loopback connectors
to test the serial ports.
Use the appropriate subsection to connect asynchronous serial devices to the
DeviceMaster LT ports.
This subsection provides the following information:
•
Connector pin assignments (below)
•
RJ45 Null-Modem Cables (RS-232)
•
RJ45 Null-Modem Cables (RS-422)
•
RJ45 Straight-Through Cables (RS-232/485)
•
•
•
You can build your own null-modem or straight-through RJ45 serial cables if you
are using the DB9 to RJ45 adapters using the following subsections.
Pin
RS-232
RS-422
RS-485 (4-Wire)
RS-485
(2-Wire)
1
RTS
Not used
Not used
2
DSR
RxD-
Not used
3
DCD
Not used
Not used
4
RxD
RxD+
Not used
5
TxD
TxD+
TxD/RxD+
6
GND
GND
GND
7
DTR
TxD-
TxD/RxD-
8
CTS
Not used
Not used