1.6.1 ALARM INPUT AND OUTPUT DETAILS
One type of the alarm port is shown as in Figure 1-6.
Figure 1 6
You can refer to the following sheet for alarm input and output information.
One type of the alarm port is shown as in Figure 1-7.
Figure 1-7.
AB Connection
port
Parameter
Grounding Alarm
Ground line
Alarm Input
1, 2, …, 8. It becomes valid in low voltage.
1-NO C, 2-NO C,
3-NO C
Three NO activation outputs.
485 A/B
485 communication port. They are used to control devices such as PTZ. Please
parallel connect 120Ω between A/B cables if there are too many PTZ decoders.
AB Connection
port
2.5.1.2 Snapshot Activation
Please follow the steps listed below to activate the snapshot function. After you enabled this
function, the system can snapshot when the corresponding alarm occurred.
• In the Encode interface, click the snapshot button to input snapshot mode, size, quality
and frequency.
• In the General interface please input upload interval.
• In the Detect interface please enable the snapshot function for specified channels, or
in the Alarm interface enable the snapshot function for specified channels.
Please refer to the following figure for detail information. See Figure 2-9.
Figure 2-9
2.5.1.3 Priority
Please note the activation of snapshot has a higher priority than schedule snapshot. If you
have enabled these two types at the same time, the system will activate the snapshot when
alarm occurs, otherwise the system just operates the schedule snapshot
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