
Figure 3. 24-channel and 32-channel DVR Exterior Sensor
Two pins are used in the connection between the sensor and DVR. One connects to the
ALARM IN pin and another connects to the GND pin.
Note
1.12V DC power is provided for most sensors and alarm output
equipment for easier system construction.
2. When the alarm input is set to “CLOSE”, the external voltage
range connected to pin “ALARM IN” is 0-5V.
Section 9 Alarm Output Connections
The DVR provides 3 alarm output ports, with” NO” and “NC” available for each alarm output.
The three alarm signals can be output through a 25 way D- type connector. The connections
are as follows: