4.4.2 Serial Rs232/Rs485/Rs422 Db9 Ports - Siemens SIMATIC NET RUGGEDCOM RS401 Installation Manual

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:
Figure 4.8
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:
Figure 4.9
a
No internal termination is provided.
RUGGEDCOM RS401
Installation Manual, 01/2020, C79000-G8976-1017-09
5 1
9 6
RS232 DB9 Serial Console
Port
5 1
9 6
RS232/RS485/RS422 DB9 Seri-
al Console Port
Communication Ports
4.4.2 Serial RS232/RS485/RS422 DB9 Ports
Pin Name
1 Reserved (Do Not Connect)
2 TX
3 RX
4 Reserved (Do Not Connect)
5 GND
6 Reserved (Do Not Connect)
7 Reserved (Do Not Connect)
8 Reserved (Do Not Connect)
9 Reserved (Do Not Connect)
a
Pin
RS232
Mode
1 CD (No
Connec-
tion)
2 TX
3 RX
4 DTR (No
Connec-
tion)
5 Common (Isolated Ground)
6 DSR (No
Connec-
tion)
c
7 CTS
c
8 RTS
9 RI (No
Connec-
tion)
Shield Chassis Ground
Description
Transmit Data
Receive Data
Common Ground
Name
RS485 RS422
Mode Mode
— —
TX/RX+ TX+
— RX+
— —
b
— RX-
TX/RX- TX-
— —
— —
25