7.Electrical Interface
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 89
1
6
2
5
3
4
INPUT2
3.3V
Line2
External circuit
Input+
Input-
Figure 7-16 Internal equivalent circuit of camera when Line2 is configured as input (ME2S)
To avoid the damage of GPIO pins, please connect GND pin before supplying power to Line2/3.
Logic 0 input voltage: 0V~+0.6V(Line2/3 voltage)
Logic 1 input voltage: +1.9V~+24V(Line2/3 voltage)
The status is unstable when input voltage is between 0.6V and 1.9V, which should be avoided
When input of Line2/3 is high, input current is lower than 100μA. When input of Line2/3 is low, input
current is lower than -1mA
When Line2/3 is configured as input. The connection method between them and NPN and PNP
photoelectric sensors is shown below.
1
2
8
7
6
4
5
3
3.3V
Line2
FPGA INPUT2
Camera internal circuit
External circuit
Signal
output
Power +
PWR GND
NPN
Pull-up
resistor
Figure 7-17 NPN photoelectric sensor connected to Line2 input circuit (MER2/ME2P)
