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Chapter 3
Communication Ports
Section 3.4.3
Serial RS232/RS485/RS422 RJ45 Ports
The RS401 can be equipped with serial RS232/RS485/RS422 RJ45 ports. Each port can be set individually through
the ROS operating system to operate in RS232, RS485 or RS422 mode. For more information, refer to the ROS
User Guide for the RS401.
The following is the pin-out description for the RS232/RS485/RS422 RJ45 ports:
8
Figure 18: RS232/RS485/RS422 RJ45 Serial Console Port
d
No internal termination is provided.
e
The DSR, DCD and DTR pins are connected together internally.
f
In RS232 mode, the RJ45 ports conform to EIA-561 DTE, which transmit on TXD and receive on RXD.
Section 3.4.4
Serial Insulated Terminals
The RS401 can be equipped with serial RS485 insulated terminals. The terminals are terminated by default from
the factory. Termination provided is AC Termination style 120 Ohm resistor in series with a 10nF capacitor. The
following details the appropriate jumper configuration for each RS485 port.
Port
1
2
3
4
The following is the pin-out description for the RS485 insulated terminals:
18
1
Jumper Number
JP5
JP6
JP7
JP8
d
Pin
RS232 Mode
e
1
DSR
e
2
DCD
e
3
DTR
4
Common (Isolated) Ground
f
5
RXD
f
6
TXD
7
CTS
8
RTS
Shield
Jumper Position
No Termination
Removed
Serial RS232/RS485/RS422 RJ45 Ports
RUGGEDCOM RS401
Installation Guide
Name
RS485 Mode
RS422 Mode
RX-
RX+
TX/RX+
TX+
TX/RX-
TX-
Chassis Ground
AC Termination
Installed
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