Setup guide

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4-Camera H.264 Security System Setup Guide
SECTION 8: DVR SYSTEM MENUS REFERENCE
HDD LOSS: ON causes a relevant alarm to occur when no HDD is installed. An alert icon will be displayed on the left bottom of
channel 1 in the live view.
VIDEO LOSS: ON causes the relevant alarm to occur when a channel has no video input.
NOTE
If the buzzer alarm is OFF, exception alarms will not be triggered.
8.6.6 I/O Alarm
Click Tool Bar -> System settings -> Alarm -> I/O Alarm to open the I/O Alarm menu. Options are dened below.
CHANNEL: Select the channel you need to setup.
I/O ALARM: Each channel corresponds to an I/O status, which means when an alarm is triggered, it will activate the corresponding
channel to start alarm recording.
N.O.: Normally open alarm type. In the normal state, the sensor device is kept at a constant low voltage (open circuit). If output
voltage changes from low to high, then the alarm is triggered (closed circuit).
N.C.: Normally closed type (also – “normally connected”). In the normal state, the sensor device is kept at a constant high voltage
closed circuit). If output voltage changes from high to low, then the alarm is triggered (open circuit).
OFF: Set to OFF if an external sensor alarms is not used.
OUTPUT: Set to ON if an alarm occurs when triggered by sensor.
RECORD: Set to ON for the channel to record when triggered by a sensor.