
5
Weighing display Load cell
+EXC + voltage
+IN + output signal
HD -----------
Shielded wire
-IN - output signal
-EXC -IN HD +IN +EXC -EXC - voltage
2.3 Communication interface
RS232 : DB9 Pin or 3 Pin
DB9 definition
5 4 3 2 1
9 8 7 6
Pin function and definition as bellows:
DB9 joint
Definition
Function
2
TXD
Sending data
3
RXD
Receiving data
5
GND
Ground interface
Note: if RS485, The connection pin is 2 and 5 pin.
3 Pin definition