AVDT-BOB
User’s manual
v1.3
Page
25
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25
5.2
GPIO Connection for “GPO” mode
The GPIO can be configurable as a GPO via the software interface. In this case, the GPIO
must be wired as displayed bellow:
Notes
:
✓
GPOs are Open-Collector type, and must be
pulled high to have a ‘1’ logic level.
Otherwise, pin will be floating (High-Z).
✓
It can be done via +12V pin, or any external
power supply referenced to device ground
(+60V max). Max current through each pin is
500mA.
✓
Devices like relays or LEDs can be plugged
directly b12V and GPOx..
5.3
GPIO Connection for “
Fader
” mode
The GPIO can be configurable as a Fader via the software interface. In this case, the GPIO
must be wired as displayed bellow:
Notes
:
✓
ADCs used internally are weakly pulled-down
(100kohm).
✓
Input range is 0 -> +12V, referenced to
device ground.
▪
0V referees to « minimum » value
▪
+12V referees to « maximum » value.
✓
Progression is linear.
✓
Devices like potentiometers can be plugged
directly between +12V/GND and GPIO in
fader mode.
1
2
3
4
G
+12
AVDT-BOB Internal logic
1 to 100k
GPO#1
GPO#2
GPO#3
1
2
3
4
G
+12
100k
AVDT-BOB Internal logic
5k / 10 k Lin.
ADC #1
ADC #2
. . .
5k / 10 k Lin.