Dahua F Series Quick Start Manual page 8

Dahua HD IR Bullet Network Camera Quick Start Guide
Alarm input, output connection description
Step 1 Connect alarm input device to the alarm input of I/O port cable.
Step 2 Connect alarm output device to the alarm output of I/O port cable, alarm output
is the relay switch output; the alarm device needs to externally pull up 10K
resistance to +3.3V.
Step 3 Open the WEB, set alarm input and output correspondingly in alarm setup.
Alarm input on the WEB is corresponding to that of the device I/O port cable.
When there is alarm, alarm input device will generate signal of high and low
level. Set corresponding NO and NC inputs.
Step 4 Set alarm output on the WEB, the alarm output is corresponding to the alarm
output end of the device, which is the alarm output port of the I/O port cable.
Please refer to the following figures for alarm input and output information. See Figure
1-4. Alarm input: When the input signal is idle or grounded, the device can collect the
different statuses of the alarm input port. The input signal is connected to 3.3V or is idle;
the device collects the logic "1". When the input signal is grounded, the device collects
the logic "0".
Figure 1-3
Figure 1-4
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