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11.3 Circuit diagrams
Digital inputs:
The input signal is active when the
optocoupler is switched on
EN
The inputs are activated when the
input pin is short-circuited to the GND
pin
Digital outputs:
If the digital output is set,
the optocoupler is conducting
Foot switch:
The footswitch input signal is activated
when the input pin is short-circuited to
the GND pin
Do NOT apply an external supply
voltage to these pins!
This can lead to defect and damage
to the device.
Operating Manual Spray Valve Controller VC 1200
VC1200
VCC
Input
Microcontroller
GND
VC1200
Output
Microcontroller
VC1200
Input
Microcontroller
36
VCC
Opto-
coupler
D2
GND
Opto-
coupler
GND
GND
4k7
33R
WS
SW
GND
I/O-Port
Input
I/O-Port
Output
1
foot
switch
3
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