Alarm Input And Output Connection - Dahua IPC-HF8232F-HDMI Quick Start Manual

1.4.1 Alarm Input and Output 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 the 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.
Alarm output: N1 and C1 or N2 and C2 make up a switch to provide the alarm output. Generally
the switch is on, and it will be off when there is an alarm output.
Figure 1-7
Figure 1-8
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