No.19S182-01
21/73
STC-MBA503POE / STC-MCA503POE
Product Specifications and User’s Guide
Open Collector GPIO
This GPIO can be used for input or output.
When using as output, it is necessary to have current limiting resistor at outside of camera, to keep current
less than 50 mA.
When using as input, current limiting resistor does not necessary. However, camera does not have current
limiting circuit on camera. The camera inside circuit may get damage if accidentally uses as output without
current limiting resistor. For safety, please add current limiting resistor even use as input.
a) Open Collector GPIO uses as output
b) Open Collector GIPO uses as input