Comtrol DB25 - RS-232 and RS-485 Straight-Through Cable for Devicemaster AIR, PRO, RTS or up; RJ45 Serial Cables and Loopback Plugs; RJ45 Pinouts

22 [Documentation number: 2000430 Rev B] Building Cables for DeviceMaster Products
RS-232 and RS-485 Straight-Through Cable for DeviceMaster AIR, PRO, RTS or UP
RS-232 and RS-485
Straight-Through
Cable for
DeviceMaster AIR,
PRO, RTS or UP
The following image displays the pinouts for an RS-232 or RS-485 straight-
through cable.
RJ45 Serial Cables and Loopback Plugs
This section describe how to build your own null-modem or straight-through RJ45
serial cables and loopback plugs.
The following DeviceMaster models support RJ45 connectors:
• DeviceMaster PRO
• DeviceMaster RTS
•DeviceMaster UP
RJ45 Pinouts The following figure illustrates the RJ45 connector signals.
DeviceMaster
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
Female
RI 9
9RI
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
DB25
8
3
2
20
7
5
6
4
Pins
22
Pin 1
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