Zhejiang Dahua Vision Technology IPC-PFW8840-A180, Быстрый старт

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Quick Start Guide
3
The ALARM_OUT port and the ALARM_OUT_GND port with the same number constitute a
switch for alarm output, see Figure 1-3. The switch is open normally and closes when there is
alarm output.
Alarm output
Log in web interface, and configure alarm input and alarm output in alarm setting.

The alarm input in the web interface is corresponding to the alarm input end of the I/O
port. There will be high level and low level alarm signal generated by the alarm input
device when alarm occurs, set the input mode to "NO" (default) if the alarm input signal
is logic "0" and to "NC" if the alarm input signal is logic "1".

The alarm output in the web interface is corresponding to the alarm output end of the
device, which is also alarm output end of the I/O port.