Axis Communications 2401, 2400 manual Controlling and Monitoring, Relay Output, Digital Inputs

AXIS 2400/2401 Admin Manual The I/O Terminal Block 55

Controlling and Monitoring

By entering http requests in your browser’s URL field, you can:

•drive the relay output high or low

•monitor the status of the 4 digital inputs

This requires you to have root access to the AXIS 2400/2401 and consequently, to supply a user name and password. Login as root and supply the root password (default = pass).

Tip!

Developers wishing to create applications incorporating sophisticated alarm conditioning using the relay output and digital inputs are encouraged to read the Camera API, HTTP-Interface Specification, available from the Axis Web at www.axis.com.

Relay Output

You can use the supported relay output to directly drive a maximum load of 24V AC/DC at 100mA. By connecting additional relay circuitry, it can also drive heavier loads.

The output relay is controlled using http requests, as defined in the following examples:

Example 1: - Set output 1 ON

http://myserver/axis-cgi/io/output.cgi?action=1:/

Example 2: - Set two 300ms pulses with 500ms delay between the pulses on output 1.

http://myserver/axis-cgi/io/output.cgi?action=1:/300\500/300\

Example 3: - Wait 1 second before setting output 1 ON.

http://myserver/axis-cgi/io/output.cgi?action=1:1000/

Digital Inputs

Four digital inputs, programmed using the Application Wizard, allow the AXIS 2400/2401 to be configured for time and alarm based image recording. For example, by connecting a motion detector to a digital input, it is a relatively simple procedure to send a single image (or video stream) to a remote imaging library each time the detector is activated.

Querying the Status of Digital Inputs

The status of the four supported digital inputs can be queried in exactly the same way as the relay output. Simply enter the following URL to query the status of the digital inputs: