20
Here
are
the
detailed
connections of these interface
to the gate control board.
Power supply connection:
The red wire("VCC")
MUST
be
connected to the positive output
terminal of the 12V power
supply,
The black wire ("GND")
MUST
be
connected to the negative
output terminal of the power
supply.
Communication connection
The white line ‚B-‛ is connected
to T / R + terminal of 485;
The gray line "A +" is connected
