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F. RS-232C Serial Communications Connection Diagram
The LCD Digital operator uses RS-232C serial communication through connector
CN1 to communicate with control board. Using the CN1 port on the control board,
parameters can be monitored and updated by a suitable PC programming tool.
The CN1 port is an un-isolated RS-232C with baud rate 2400 bps. Contact TECO
for further information.
•The pin definitions of CN1
－6 pin telephone jack
Pin Signal Definition
1 LCD/PC selection
25V
3Rx
4Tx
50V
6 5 4 3 2 1
6 Reserved (-5V, for LCD display)
•Typical connection diagram
Tx
Rx
RxTx
6
1
2
5
3
4
CN1
1
6
7
8
9
2
3
4
5
PC
DB9
connector
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