Axis Communications 2120 - Manual (Page 59)

AXIS 2120 User’s Manual Appendix C - The Unit Connectors 59
Schematic Diagram
Schematic diagram of the I/O and RS232 connector - showing a possible application
Caution!
Pins 1 and 2 are connected to the derived DC power for the unit, and can be used as an external power
feed for external equipment, such as an infrared sensor. When connecting other equipment using this
connector, the maximum current of 50mA must be strictly observed. Failure to do so may cause a loss
of power to the unit and may even damage your camera.
AXIS 2120
o
o
GND.
Mode
Power
Supply
3.3V
!
!
! ! !
!
!
! !
!
o
o
Switch
1
o
! !
COM 1
!
!
GND PIN 5
2
o
!
o
!
4
3
Mains Power
Appliance
o
o
o
x
o o
o o
o o o o
Infrared Sensor
! ! !
!
- +
Internal
~
PS-D
9 VA