Axis P1311 User Manual page 38

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, it provides the interface to:
• 1 transistor output - For connecting external devices such as relays and LEDs. Con-
nected devices can be activated by the VAPIX® Application Programming Interface,
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.
• 1 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 Notes
GND 1 Ground
3.3V DC Power 2 Can be used to power auxiliary equipment.
Note: This pin can only be used as power out.
Digital Input 3 Connect to GND to activate, or leave floating (unconnected) to
deactivate.
Digital Output 4 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.
The following connection diagram gives an example of how to connect an auxiliary device to the AXIS P1311.
1
3.3V
max. 50mA 2
3
4
D
G
S
38
AXIS P1311 - Unit connectors
Pin 4
Pin 3
Specifications
Max load = 50 mA
Min. input = -40 V DC
Max. input= +40 V DC
Max. load =100 mA
Max. voltage = + 40 V DC
E.g. push button
Pin 2
Pin 1