Dahua F Series Quick Start Manual - Page 10

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Dahua HD IR Waterproof Fixed Network Camera Quick Start Guide

Alarm input, output description:

Step 1

Connect alarm input device to the alarm input of I/O cable.

Step 2

Connect alarm output device to the alarm output of I/O cable, alarm output is collector

open circuit output which connects 10K resistor to 3.3V externally.

Step 3

Open the Web, set alarm input and output correspondingly. Alarm input on WEB

corresponds to I/O cable on device. When there is alarm, alarm input device will

generate signal of high and low level. Set corresponding NO and NC inputs.

Step 4

Set the WEB alarm output. The alarm output is for the alarm output port of the device. It

is the alarm output port of the I/O cable.

1.4.1 Alarm IN/OUT Connection

Please refer to the following figure for alarm input information. See Figure 1-7.

Alarm input: When the input signal is idle or grounded, the device can collect the different

statuses of the alarm input port. When the input signal is connected to 3.3V or it is idle, the

device collects the logic "1". When the input signal is grounded, the device collects the logic "0".

Please refer to the following figure for alarm output information. See Figure 1-8.

When alarm output is OC, it needs to increase pull-up resistance externally to work normally;

output signal is high and low level. After external pull-up resistance is increased, the default of

output signal is high level, and it switches to low level when there is alarm output.

The working current of alarm output port is recommended as <= 10mA. The max current which is

used to drive external circuit is 80mA, it is advised to add a relay if it is beyond the value.

Figure 1-7 Alarm input

Figure 1-8 Alarm output