13
Function
JP24
5V Vpp
2-3
12V Vpp
1-2
2.9 Serial Port3/Port4 RI Pin Setting
The Port3 and Port4 can 5V or +12V power to the
serial devices via RI pin(Pin 9) of the COM port connector.
The max. current is 1A with fuse protection for the total two
connector’ s 5V/12V output..
•
JP9/JP29 : Port3(CN1),Pin 9
RI signal or 5V/12V output selection
Function
JP9
JP29
RI Signal
2-3
1-2
5V
1-2
1-2
12V
1-2
2-3
•
JP8/JP10 : Port4(CN2),Pin 9
RI signal or 5V/12V output selection
Function
JP8
JP10
RI Signal
2-3
1-2
5V
1-2
1-2
12V
1-2
2-3
3
