CSW-H85K2 User Manual Ver. 1.2
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1.7.3
Serial Interface
CSW-H85K2 has D-SUB 9 pin male connector for connecting serial devices.
Figure 1-7 D-SUB 9 pin male connector
⚫
Pin Assignment in RS232
Number Name
Description
Level
I/O
Wiring
1
-
-
-
-
-
2
RXD
Receive Data
RS232
In
Required
3
TXD
Transmit Data
RS232
Out
Required
4
DTR
Data Terminal Ready
(always output active signal)
RS232
Out
Optional
5
GND
Ground
Ground
-
Required
6
DSR
Data Set Ready
RS232
In
Optional
7
RTS
Request To Send
RS232
Out
Optional
8
CTS
Clear To Send
RS232
In
Optional
9
-
-
-
-
-
Table 1-3 pin assignment in RS232
⚫
Pin Assignment in RS422
Number
Name
Description
Level
I/O
Wiring
1
TX -
Transmit Data -
RS422
Out
Required
2
-
-
-
-
-
3
RX -
Receive Data -
RS422
In
Required
4
RX +
Receive Data +
RS422
In
Required
5
GND
Ground
Ground
-
Required
6
-
-
-
-
-
7
-
-
-
-
-
8
-
-
-
-
-
9
TX +
Transmit Data +
RS422
Out
Required
Table 1-4 pin assignment in RS422