HikRobot USB3.0 User Manual page 47

Figure 10-4 Bi-directional I/O Connecting to PNP Device as Input
 NPN Device
If the VCC of NPN device is 24 VDC, and it is recommended to use 4.7 KΩ pull-up resistor.
If the VCC of NPN device is 12 VDC, and it is recommended to use 1 KΩ pull-up resistor.
Figure 10-5 Bi-directional I/O Connecting to NPN Device as Input
 Switch
The switch can provide low electrical level to trigger bi-directional I/O.
USB3.0 Board Level Camera
Bi-direction I/O
I/O Signal Ground
Bi-direction I/O
I/O Signal Ground
Camera Power
Camera Power Ground
Figure 10-6 Bi-directional I/O Connecting to a Switch as Input
User Manual
·
VCC
●
PNP Power
● ●
GND of VCC and I/O Signal
VCC
●
●
NPN Power
●
Ground
GND of VCC and I/O Signal
PWR
Bi-direction I/O
GND of PWR and VCC
38
PNP Power
Signal Line
Ground
NPN Power
Signal Line
> 3.3 V
0 V
PNP Device
NPN Device