Siemens RUGGEDCOM RS910 Installation Manual page 22

Chapter 3
Communication Ports
Figure 15: Serial DB9 Port
a
No internal termination is provided.
b
The Common terminal is optically isolated. However, there is transient voltage protection circuitry between the Common terminal and chassis ground.
c
Connected internally.
d
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.
8
Figure 16: Serial RJ45 Port
e
No internal termination is provided.
f
Connected internally.
g
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.
16
5 1
9 6
1
a
Pin RS232 Mode
1 DCD
2 TX
3 RX
4 DTR
5 Common (Isolated Ground)
6 DSR
cd
7 CTS
cd
8 RTS
9 RI (No
Connection)
Shield Chassis Ground
e
Pin RS232 Mode
f
1 DSR/RI
f
2 DCD
3 DTR
4 Common (Isolated) Ground
5 RX
6 TX
fg
7 CTS
g
8 RTS
Shield Chassis Ground
RUGGEDCOM RS910
Installation Guide
RS485 Mode RS422 Mode
TX/RX+ TX+
RX+
b
RX-
TX/RX- TX-
RS485 Mode RS422 Mode
RX-
RX+
TX/RX+ TX+
TX/RX- TX-
Serial Ports