Communication Ports
4.4.2 Serial RS232/RS485/RS422 DB9 Ports
ing with an another DCE device, such as another RUGGEDCOM RS401, 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 RS401 can be equipped with serial RS232/RS485/RS422 DB9 ports.
Each port can be set individually through the RUGGEDCOM RS401 operating sys-
tem to operate in RS232, RS485 or RS422 mode. For more information, refer to the
RUGGEDCOM ROS Configuration Manual
for the RUGGEDCOM RS401.
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 Seri-
al Console Port
Name
Pin
RS232
Mode
RS485
Mode
RS422
Mode
1
CD (No
Connec-
tion)
—
—
2
TX
TX/RX+
TX+
3
RX
—
RX+
4
DTR (No
Connec-
tion)
—
—
5
Common (Isolated Ground)
6
DSR (No
Connec-
tion)
—
RX-
7
CTS
TX/RX-
TX-
8
RTS
—
—
9
RI (No
Connec-
tion)
—
—
Shield
Chassis Ground
No internal termination is provided.
RUGGEDCOM RS401
Installation Manual, 02/2020, C79000-G8976-1017-10
25
