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Figure 11-3: DIO setting
Input Settings
Each camera has a corresponding sensor input. This sensor input must be of the dry contact closure
type, with a voltage of less than 5V.
Depending on their attributes, the sensors can be set to Normal Open (NO) or Normal Closed (NC)
according to the users’ application requirements.
Normal open, NO
When the sensor is of the NO type, DI is connected to the NO connection of the sensor and GND is
connected to the COM connection of the sensor. When the alarm is triggered, the circuit connected
to the alarm sensor input of the DVR will be closed.
Normal Closed, NC
When the sensor is of the NC type, DI is connected to the NC connection of the sensor and GND is
connected to the COM connection of the sensor. When the alarm is triggered, the circuit connected
to the alarm sensor input of the DVR will be open.
Please set the Normal Open or Normal Closed value for each DI, according to the type of connected
sensor, using the following screen, and also select the appropriate Delay time (the DVR system alarm
delay interval) for each connected sensor.
Figure 11-4: DIO Setting
