GPIO Electrical Characteristics
Both the opto-isolated input and output have over current protection.
The output is open collector and thus requires a pull-up resistor to operate. The rise time and bias current will be determined by the resistor value chosen. If the camera is generating an output signal that approaches the rise time plus the fall time of the opto-isolated circuit, care must be taken to optimize the pull-up resistor chosen to minimize the rise time while still remaining within the current limits of the output circuit.
The opto-isolated specifications listed below are applicable when power to the camera is provided through the interface and not through the GPIO.
Operating Range
Description | Minimum | Maximum |
---|---|---|
Non-opto-isolated Voltage | 0 V | 24 V |
Opto-isolated Input Voltage | 0 V | 30 V |
Opto-isolated Output Voltage | 0 V | 24 V |
Non-opto-isolated Sinking Current | 25 mA | |
Opto-isolated Output Current | 25 mA | |
3.3 V Output Current | 200 mA |
Absolute Maximum Ratings
Description | Minimum | Maximum |
---|---|---|
Non-opto-isolated Voltage | -24 V | 42 V |
Opto-isolated Input Voltage | -70 V | 40 V |
Opto-isolated Output Voltage | -24 V | 24 V |
Opto-isolated External Voltage Resistor Combinations
External Voltage |
External Resistor |
OPTO_OUT Low Voltage |
OPTO_OUT High Voltage |
Output Current |
Output Current Low |
Output Current High |
||
---|---|---|---|---|---|---|---|---|
No Load | Load | No Load | Load | No Load | Load | Load | ||
3.3 V | 200 Ω | 1.47 V | 1.44 V | 3.25 V | 2.64 V | 8.4 mA | 2.52 mA | 8.52 mA |
5 V | 1.0 kΩ | 0.92 V | 0.86 V | 5 V | 2.29 V | 3.9 mA | 2.68 mA | 4.04 mA |
12 V | 2.4 kΩ | 1.08 V | 1.02 V | 12.08 V | 3.78 V | 4.54 mA | 3.44 mA | 4.56 mA |
24 V | 4.7 kΩ | 1.3 V | 1.08 V | 24 V | 6.36 V | 4.78 mA | 3.7 mA | 4.82 mA |
30 V | 4.7 kΩ | 1.4 V | 1.32 V | 30 V | 11.08 V | 5.96 mA | 3.02 mA | 5.08 mA |
Values are for reference only |
Opto-isolated input circuit
Opto-isolated output circuit
External Voltage Resistor Combinations at 90 FPS (Non-isolated input/output)
External Voltage |
External Resistor |
Output Current |
---|---|---|
3.3 V | 1.0 Ω | 3.1 mA |
5.0 V | 1.0 kΩ | 4.8 mA |
12 V | 2.0 kΩ | 6.0 mA |
12 V | 2.4 kΩ | 5.0 mA |
24 V | 4.7 kΩ | 5.2 mA |
Values are for reference only |
Input/Output circuit