Connecting Serial Devices - Comtrol Device Master UP Hardware User's Manual

DeviceMaster UP 16-Port Hardware User Guide: 2000596 Rev. B

Connecting Serial Devices

Note: If you have a DeviceMaster UP with 1, 2, or 4-ports, use the
UP Hardware Installation and Configuration Guide
connectors have different pin outs.
This section discusses connecting your serial devices to the DeviceMaster UP. 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 UP 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)
• RJ45 Loopback Plugs
• RJ45 RS-485 Test Cable
• Connecting RJ45 Devices
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
1
2
3
4
5
6
7
8
on Page 26
on Page 26
on Page 27
on Page 27
on Page 27
RS-232 RS-422
RS-485 (4-Wire)
RTS Not used
DSR RxD-
DCD Not used
RxD RxD+
TxD TxD+
GND GND
DTR TxD-
CTS Not used
DeviceMaster
because the RJ45
on Page 26
RS-485
(2-Wire)
Not used
Not used
Not used
Not used
TxD/RxD+
GND
TxD/RxD-
Not used
Connecting Serial Devices - 25