Communication Ports
4.4.2 Serial RS232/RS485/RS422 DB9 Ports
communicating with an another DCE device, such as another RUGGEDCOM RS400,
the RX and TX pins must be
crossed-over
using, for example, a NULL modem cable.
The following is the pin-out description for the RS232 DB9 ports:
1
5
9
6
Figure 4.8
RS232 DB9 Serial Console
Port
Pin
Name
Description
1
Reserved (Do Not Connect)
2
TX
Transmit Data
3
RX
Receive Data
4
Reserved (Do Not Connect)
5
GND
Common Ground
6
Reserved (Do Not Connect)
7
Reserved (Do Not Connect)
8
Reserved (Do Not Connect)
9
Reserved (Do Not Connect)
4.4.2
Serial RS232/RS485/RS422 DB9 Ports
The RUGGEDCOM RS400 can be equipped with serial RS232/RS485/RS422 DB9 ports.
Each port can be set individually through the RUGGEDCOM RS400 operating system
to operate in RS232, RS485 or RS422 mode. For more information, refer to the
RUGGEDCOM ROS Configuration Manual
for the RUGGEDCOM RS400.
The following is the pin-out description for the RS232/RS485/RS422 DB9 ports:
1
5
9
6
Figure 4.9
RS232/RS485/RS422 DB9
Serial Console Port
Name
Pin
RS232
Mode
RS485
Mode
RS422
Mode
1
CD (No
Connection)
—
—
2
TX
TX/RX+
TX+
3
RX
—
RX+
4
DTR (No
Connection)
—
—
5
Common (Isolated Ground)
6
DSR (No
Connection)
—
RX-
7
CTS
TX/RX-
TX-
8
RTS
—
—
9
RI (No
Connection)
—
—
Shield
Chassis Ground
No internal termination is provided.
The Common terminal is optically isolated. However, there is transient voltage protection circuitry
between the Common terminal and chassis ground.
RUGGEDCOM RS400
Installation Manual, 01/2021, C79000-G8976-1016-11
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