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Communication Ports
4.2.1 Serial RS232/RS485/RS422 DB9 Ports
Off
For specifications on serial ports, refer to
4.2.1
Serial RS232/RS485/RS422 DB9 Ports
The RS920L can be equipped with serial RS232/RS485/RS422 DB9 ports. Each port
can be set individually through the RUGGEDCOM RS920L operating system to oper-
ate in RS232, RS485 or RS422 mode. For more information, refer to the RUGGED-
COM RS920L User Guide for the RS920L.
The following is the pin-out description for the RS232/RS485/RS422 DB9 ports:
Figure 4.3
a
No internal termination is provided.
b
Connected internally.
c
The Common terminal is isolated. However, there is transient voltage protection circuitry between the
Common terminal and chassis ground.
d
Cnnected internally.
e
In RS232 mode, this pin enters a high impedance state. A DTE that asserts RTS will see CTS asserted,
although the device will not perform hardware flow control.
4.2.2
Serial RS232/RS485/RS422 RJ45 Ports
The RS920L can be equipped with serial RS232/RS485/RS422 RJ45 ports. Each port
can be set individually through the RUGGEDCOM RS920L operating system to oper-
ate in RS232, RS485 or RS422 mode. For more information, refer to the RUGGED-
COM RS920L User Guide for the RS920L.
24
State
1
5
9
6
RS232/RS485/RS422 DB9 Seri-
al Console Port
Description
No link detected
"Serial Port Specifications (Page
a
Pin
RS232
Mode
b
1
DCD
2
TX
3
RX
b
4
DTR
5
Common (Isolated Ground)
b
6
DSR
d
e
7
CTS
d
e
8
RTS
9
RI (No
Connec-
tion)
Shield
Installation Manual, 02/2020, C79000-G8976-1032-06
29)".
Name
RS485
RS422
Mode
Mode
TX/RX+
TX+
RX+
c
RX-
TX/RX-
TX-
Chassis Ground
RUGGEDCOM RS920L
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