Communication Ports
4.3.1 Serial RS232/RS485/RS422 DB9 Ports
Note
On power-up, all serial ports default to RS485 mode. Each port can be individually set
to RS232, RS485 or RS422 mode through RUGGEDCOM RS910 . For more informa-
tion, refer to the
RUGGEDCOM RS910 User Guide
for the RUGGEDCOM RS910.
All serial ports feature an LED that indicates the current state of the port.
State
Description
Green
Link activity detected
Off
No link detected
For specifications on serial ports, refer to
"Serial Port Specifications (Page 30)"
.
4.3.1
Serial RS232/RS485/RS422 DB9 Ports
The RS910 can be equipped with serial RS232/RS485/RS422 DB9 ports. Each port
can be set individually through the RUGGEDCOM RS910 operating system to operate
in RS232, RS485 or RS422 mode. For more information, refer to the
RUGGEDCOM
RS910 User Guide
for the RS910.
The following is the pin-out description for the RS232/RS485/RS422 DB9 ports:
1
5
9
6
Figure 4.8
RS232/RS485/RS422 DB9 Seri-
al Console Port
Name
Pin
RS232
Mode
RS485
Mode
RS422
Mode
1
DCD
2
TX
TX/RX+
TX+
3
RX
RX+
4
DTR
5
Common (Isolated Ground)
6
DSR
RX-
7
CTS
TX/RX-
TX-
8
RTS
9
RI (No
Connec-
tion)
Shield
Chassis Ground
No internal termination is provided.
Connected internally.
The Common terminal is isolated. However, there is transient voltage protection circuitry between the
Common terminal and chassis ground.
Cnnected internally.
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.
24
RUGGEDCOM RS910
Installation Manual, 02/2020, C79000-G8976-1029-09