Allied Vision Alvium 1800 U-158m Guide De Démarrage Rapide page 80

Damage to the camera and peripherals by reverse polarity
If Alvium USB cameras are powered with reverse polarity, cameras
and connected peripherals are damaged.
• Before connecting camera power and I/O power, carefully read
Pin Signal
VCC-
1
EXT-IN
EXT-
2
GPIO 0
EXT-
3
GPIO 1
24
the information about connector pin assignment.
< - > Level
PWR
4.5 to 5.5 VDC
IN
U (low) = -0.3 to 0.8 VDC
in
U (high) = 2.0 to 5.5 VDC
in
IN/
U (low) = 0 to 0.4 VDC
out
OUT
(high) = 2.4 to 3.3 VDC 
U
out
IN/
OUT
NOTICE
Description
Power supply voltage
See Camera power on page 13.
General purpose input/output
Internal pull-up resistor: 33 kΩ
to 63 kΩ
at max. 12 mA
See Pin 2, EXT-GPIO 0