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AXIS 241Q/S/QA/SA - Unit Connectors
The I/O Terminal Connector
This section describes the pinout and interface support provided by the 12-pin I/O terminal
connector, which includes:
• 4 digital transistor outputs
• 4 digital inputs
• an RS-485 interface
• auxiliary power and GND
The terminal connector is used in applications for e.g. motion detection, event triggering,
time lapse recording, alarm notification via email, image storage to FTP locations, etc.
•
Inputs
- e.g. a push button. If the button is pressed, the
state
changes, and the
input will be active (shown under
Event Configuration > Port Status
).
•
Outputs
- e.g. an alarm device that can be activated from Output buttons on the
Live View
page or as an action to an
Event Type
. The output will show as
active
(in
Event Configuration > Port Status
), if the device is activated.
The Video Server includes one (green) 12-pin connector block. Connect input/output
devices to this block:
1. Loosen the corresponding screw on top of the pin on the connector block (see the
table above to determine which pin to use).
2. Push the cable into the connector block and secure it by fastening the screw.
3. Once all devices are connected, connect the connector block to the Video Server’s
terminal connector.
Pin
Function Description
1
Auxiliary DC Power Input
7-20 VDC/min 8W. Electrically connected in parallel with PS-k power
connector, provides an auxiliary connector for mains power to the unit.
If the product is powered via this pin, use a fuse (Fuse rating: 1A Slow).
This pin can also be used to power auxiliary equipment, max 100mA
2
GND
3
Digital Input 1
Connect to GND to activate or leave floating (or unconnected) to
deactivate.
4
Digital Input 2
5
Digital Input 3
6
Digital Input 4
7
Transistor Output
With a maximum load of 100mA and maximum voltage of 24V DC, this
output has an open-collector NPN transistor with the emitter
connected to pin 2 (GND). 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.
8
Transistor Output
9
Transistor Output
10
Transistor Output
11
RS-485 - A (non-inverting)
A half-duplex RS-485 interface for controlling auxiliary equipment,
e g. PTZ devices.
12
RS-485 - B (inverting)
