Axis Communications 2 user manual Controlling and Monitoring, Transistor Output, Digital Inputs

52 Unit Connections AXIS 230

Controlling and Monitoring

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

•drive the transistor output high or low

•monitor the status of the digital inputs

This requires administrator access to the AXIS 230, and thus a user name and password. Log in as root and supply the root password (default = pass).

Tip!

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

Transistor Output

The output can directly drive a maximum load of 24V DC at 100mA. By connecting additional relay circuitry, heavier loads can be driven.

The transistor output is controlled using HTTP requests, as shown in the following examples:

Example 1: - Set output 1 ON

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

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

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

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

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

Digital Inputs

Two digital inputs allow the AXIS 230 to be configured for device triggered events. For example, by connecting a motion detector to a digital input, it is a relatively simple procedure to trigger an event each time the detector is activated.

Querying the Status of Digital Inputs

The status of the 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: