7.Electrical Interface
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 20
1
4
3
2
1.8V
FPGA INPUT2
Camera internal circuit
External circuit
Line2
Input+
Input-
Figure 7-6 Internal equivalent circuit of camera when Line2 is configured as input
To avoid the damage of GPIO pins, please connect GND pin before supplying power to Line2.
⚫
Logic 0 input voltage: 0V~+0.6V (GPIO1 voltage)
⚫
Logic 1 input voltage: +1.9V~+24V (GPIO1 voltage)
⚫
The status is unstable when input voltage is between 0.6V and 1.9V, which should be avoided
⚫
When input of Line2 is high, input current is lower than 100uA. When input of Line2 is low, input current
is lower than -1mA. The connection method between Line2 and NPN/PNP photoelectric sensors is
shown in Figure 7-7 and Figure 7-8. The relationship between the pull-up resistor value and the
external input voltage is shown in Table 7-3
1
4
3
2
External circuit
Signal output
Power+
PWR GND
NPN
Pull-up
resistor
Line2
1.8V
FPGA INPUT2
Camera internal circuit
Figure 7-7 NPN photoelectric sensor connected to Line2 input circuit
