Ir Light Connection - Dahua IPC-HF3500 Series User Manual

If the type is NC, this button is normal off. The button becomes off when there is an alarm output.

2.5.2 IR Light Connection

Please refer to the following figure for external IR light information. See Figure 2-7.
IR synchronization input signal. When the external IR light is on, the signal cable from the board
outputs the 3.3V/1mA. It outputs the 0V when the IR light is off.
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Figure 2-6
Figure 2-7
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