Optima Scale OP-905 - Page 22

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USB-COM as below RS485 as below.
PIN Denition Interface Function
RX1 RS232-1 recieve
RS232-1 Continues Tranmit
TX1 RS232-1 transmit
GND Earthing
RX2 RS232-1 recieve
RS232-2 Printing
TX2 RS232-1 transmit
GND Earthing
8X3 RS232-1 recieve
RS232-3
Electrical
Isolation
C18:
Commanding mode
Printing mode
Continues transmit mode
TX3 RS232-1 transmit
GND Earthing
A RS485 output A
RS485
Electrical isolation
Commanding mode
B RS485 output B
USBV+ USB power
USB to COM
Electrical isolation
Commanding mode
D- Data-
D+ Data+
GND USB earthing