Axis Communications Axis Video Server AXIS 240Q - Manual (Page 45)

45 AXIS 240Q - 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 AXIS 240Q includes one (green) 12-pin terminal block. Connect input/output devices
to this block:
1. Loosen the corresponding screw on top of the pin (see the table above to
determine which pin to use).
2. Push the cable into the connector and secure it by fastening the screw.
3. Once all devices are connected, connect the terminal block to the video server’s
terminal connector.
Pin Function Description
1 Auxiliary DC Power Input 7-20 VDC/min 7W. 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)