SecurityMan NDVR-04 - Manual (Page 8)

8
Alarm (output) Installation
Note: Each sensor corresponds to each camera channel, for example, alarm input #1 will
correspond to channel #1 and so on.
DVR Installation
This unit contains 4 sensor inputs in which each sensor corresponds to the 4 channels. The sensor
installation procedures are as follow. There are two simple step in installing the sensors.
connecting the sensor signal line: connect the sensor signal line to DVR. The sensor signal terminal
is located on the rear panel of the DVR.
Then Connect the sensor jack to the sensor, and plug in the adaptor to an electrical outlet to power up sensor.
Sensor Installation
IN1 IN2
IN3 IN4 Alarm (output)
The unit provides 1 internal switch to sound the alarm when the sensor is activated. The switch is open at normal
state a wiring diagram as shown below. When the alarm is activated, the switch is closed so that the alarm gets the
power. The circuitry is shown as in the below figure. There are two simple steps to install the alarm.
a) Prepare the power supply for the alarm by connecting the power adapter from the camera to the power
outlet.
b) Connect the alarm power line to the alarm output terminal located on the back of the DVR as shown below.
Alarm AC/DC adaptor
Power outlet
Signal Line
Power
NOTICE: Sensor input is RECOGNIZED as LOW when alarm
signal is on the same level with GND, and it is recognized as
HIGH when alarm signal is Floating or 5V, following the internal
circuit. Thus, circuitry can be damaged, when the sensor input
goes to a Negative level or voltage higher than 5V.
D1
5
V