The Unit Connectors
AXIS 2100 User’s Guide
48
The IO Connector
A 4-pole connector is provided for auxiliary IO connections to the AXIS 2100.
Physical Connector
The IO connector provides the interface to a single digital output and a single digital input. A
diagram for the connector complete with a pinout table is provided below.
Digital Input
Used for connecting external alarm devices and triggering images for specific alarm-based events,
the digital input is typically connected to a motion detector - or any other external security device -
for taking images on each occasion the detector is activated.
Digital Output
The supported transistor output can drive a maximum load of 24V DC at 100mA directly, and by
connecting additional relay circuitry, it can drive even heavier loads.
Using the
Administration Tools
, you must first enable
IO Status
in the
Layout Settings
for the
Digital Output
ON/OFF
buttons to be displayed in the product
Home Page
. The status of the
Digital Output is then controlled by simply clicking these buttons.
Pin
Function
1
Common Ground
2
Positive Connection for DC Power Input or Output:
Electrically in parallel with the derived DC power for the unit, this pin may be used as a
power input or output. As a power input it can be used for remote applications to
supply the AXIS 2100 via an external direct current source; for example, a 9-15V DC
battery supply. Used as a power output, it can drive the photo coupled input or other
equipment; such as an infrared sensor. The output voltage level is dependent upon the
input voltage to the unit. A maximum current of 50mA can be sourced from the DC
output.
3
Digital Input (photo-coupled anode on the diode):
Voltages 5-24V DC will activate the input. It is possible to use pin 2 to source the input.
4
Digital Transistor Output:
With a maximum load of 100mA and a maximum voltage of 24V DC, this output has an
open-collector NPN transistor with the emitter connected to pin 1. If it is to be used
with an external relay, a diode must be connected in parallel with the load for protection
against any voltage transients - as detailed in the
Schematic Connection Diagram of the I/O
and RS232 Connector,
on page 51.
Note:
Connecting AC to the transistor output will
damage the unit.
1
2
3
4
