H
H
H
R
R
R
M
M
M
-
-
-
6
6
6
0
0
0
2
2
2
P
P
P
20
6.5 Ports and Switchers
The HRM-602P Switcher provides standard RS-232 serial communication port. Beside
the front panel for key switching operation, you can also use the RS-232 serial
communication port to carry out remote operation.
6.5.1 RS-232
The RS-232 Pin functions are described as below:
Pin No.
Abbreviation
Description
1
N/u
Null
2
TXD
Send
3
RXD
Receive
4
N/u
Null
5
GND
Ground
6
N/u
Null
7
N/u
Null
8
N/u
Null
9
N/u
Null
Figure 6-8 (a)
