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DHU500 Series MPEG4-4/8/16Channel - Installation/ Operation Manual
Appendix 2
SENSOR INSTALLATION
1. Components
1) External Sensor: 1 (You should prepare one set)
2) DVR System: 1
2. Inner Circuit for Sensor Input
The inner circuit of Mpeg 4 DVR is as follows,
5V DC
2.2k
0.1uF
PC817
12V DC
2.2k
Internal Check Point
Outlet Point
SENSOR IN
DVR
GND
PC817 : Photo Coupler
The Specification of PC817