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Dahua HD Mobile Network Camera Quick Start Guide
Step 4 Set alarm output on the WEB, alarm output corresponds to the alarm output
port of the device, which is the alarm output port of I/O port cable.
Refer to Figure 1-6 for alarm input and output.
Alarm input: When the input signal is idle or grounded, the device can collect different
statuses of the alarm input port. When the input signal is connected to +3.3V~5V or it is
idle, the device collects the logic "1". When the input signal is grounded, the device
collects the logic "0".
Refer to Figure 1-7 and Figure 1-8 for alarm output.
Mode A:
Level application. The alarm outputs high and low level, and alarm output is OC. It
needs to increase pull-up resistance externally to work normally. The Max external pull-
up level is 5V, Max port current is 5mA. After external pull-up resistance is increased,
the output signal is high level by default (external pull-up voltage). When there is alarm
output, it switches to low level (when the working current is 5mA, output voltage is less
than 0.8V).
Figure 1-6
Figure 1-7
Figure 1-8
4
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