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M1 – M3 Display units
3.3.9. THE RS232 COMMUNICATION PORT
The M3 is fitted with a RS232 port. It allows linking the M1/M3 to PC or an external
system. The configuration is as following
CONNECTOR PINOUT
It is fitted with a SUBD 9 pins female connector.
Pin
Signal
1
2
RX
3
TX
4
IN1
5
Gnd
6
7
IN2
8 &9
9600 bauds, 8 bits, 1 stop bit, no parity
Direction Description
Not used
Input
Reception of data
Output
Transfer of data
Input
Do not use. Only for firmware update
-
Ground
Not used
Input
Do not use. Only for firmware update
Not used
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