Axis Communications Q1910 Guide D'installation page 19

AXIS Q1910/-E/AXIS Q1921/-E Installation Guide
I/O terminal connector - Used in applications for e.g. motion detection, event
triggering, time lapse recording and alarm notifications. In addition to an
auxiliary power and a GND pin, the network camera has 2 pins that can be
configured as either input or output. These pins provide the interface to:
• Transistor output - For connecting external devices such as relays and
LEDs. Connected devices can be activated by AXIS VAPIX API, output
buttons on the Live View page or by an Event Type. The output will show as active (shown
under Events > Port Status) if the alarm device is activated.
• Digital input - An alarm input for connecting devices that can toggle between an open and
closed circuit, for example: PIRs, door/window contacts, glass break detectors, etc. When a
signal is received the state changes and the input becomes active (shown under
Events > Port Status.)
Function Pin number
GND 1
3.3 V DC 2
Power
Configurable 3 - 4
(Input or
Output)
Notes
Ground
Can be used to power auxiliary equipment.
Note:
This pin can only be used as power out.
Digital input - Connect to GND to activate, or
leave floating (or unconnected) to deactivate.
Digital output - Uses an open-drain NFET
transistor with the source connected to GND.
If used with an external relay, a diode must
be connected in parallel with the load, for
protection against voltage transients.
Page 19
I/O
4 3 2 1
Specifications
Max load = 250 mA
Min input = - 40 V DC
Max input = + 40 V DC
Recommended range:
0 V DC to +20 V DC
Max load = 100 mA
Max voltage = + 40 V DC
Recommended voltage:
Up to +20 V DC