Dahua DHI-NVR5208-4KS2 User Manual page 237

Step 3 Set Alarm In channel number and then select the Enable check box to enable the
function.
Step 4 Configure parameters. See Table 4-44.
Parameter Description
Alarm in Select a channel to set alarm.
Enable
Check the box
Alarm
Enter an alarm name.
Name
Type NO (normal open) or NC (normal close).
Define a period during which the alarm is active. For details, see "Setting Period
Period
in 4.8.5.1 Motion Detect."
The alarm device (such as lights, sirens, etc.) is connected to the alarm output
Alarm Out port. When an alarm occurs, the NVR device transmits the alarm information to
the alarm device.
Latch When the alarm ends, the alarm extended for a period of time. The time range is
from 0 seconds to 300 seconds.
Figure 4-165
Table 4-44
to enable the function.
Local Basic Operation 226