Conceptronic C8CHCCTVKIT - Rear Panel; Alarm Input Port

6
Rear panel
Item
Interface
Description
1
VIDEO IN
8ch video input
2
AUDIO IN
8ch audio input
3
V-OUT
1ch video output
4
A-OUT
1ch audio output
5
VGA
VGA monitor
６
HD-OUT
HDMI interface
７
NETWORK
RJ45
８
USB
First USB for backup or upgrade system of DVR; Second
USB for mouse
９
ON/OFF
Power supply switcher
１０
DC-12V
Power adaptor port
１１
ALARM IN：IN1-IN4 alarm input port
RS-485：A , B
ALARM OUT: N1 alarm output port, every channel connect
GND、OUT、COM;
every two channel OUT, COM port is for GND;
2.1.3 Alarm input port
4chanel alarm input, the mode of alarm input is no restriction (possible is normal open also normal close);
the GND alarm detector connect to COM under parallel connection (the power of alarm detector supply by external power supply;
the ground terminal of alarm detector join-up in parallel with DVR;
the NC of alarm detector connect with the input end (alarm) of DVR;
when you want to reset the remote alarm of triggered , the +12V power supply of alarm detector supply by DVR, for example, smoke detector.
When you select the external power supply, please share the GND with DVR;
Alarm input circuit:
Alarm inlet connection:
2.1.4 Alarm output port