The I/O Terminal Connector - Axis Video Server 241SA User Manual

AXIS 241QA/AXIS 241SA - Unit connectors
58

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.
Pin Function
1 Auxiliary DC Power Input
2 GND
3 Digital Input 1
4 Digital Input 2
5 Digital Input 3
6 Digital Input 4
7 Transistor Output
8 Transistor Output
9 Transistor Output
10 Transistor Output
11 RS-485 - A (non-inverting)
12 RS-485 - B (inverting)
The AXIS 241QA/AXIS 241SA 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.
Description
7-20 VDC/min 8W. Electrically connected in parallel with the power
connector, this provides an auxiliary connection for mains power to
the unit. If the product is powered via this pin, use a fuse (rating: 1A
Slow).
This pin can also be used to power auxiliary equipment, 9vDC max
100mA.
ground
Connect to GND to activate or leave floating (or unconnected) to
deactivate.
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.
A half-duplex RS-485 interface for controlling auxiliary equipment,
e g. PTZ devices.