Alarm Input Port; Alarm Output Port - ClearView 10.2-inch Combo Digital Video Recorder Quick Start Manual

1, 2, 3, 4.
NO C
Rx,TX
A/B

1.9.2 Alarm Input Port

Please refer to the following sheet for more information.
4-channel alarm input. Normal open or Normal close type.
Please parallel connect COM end and GND end of the alarm detector (Provide external
power to the alarm detector).
Please parallel connect the Ground of the combo DVR and the ground of the alarm detector.
Please connect the NC port of the alarm sensor to the combo DVR alarm input(ALARM)
Use the same ground with that of combo DVR if you use external power to the alarm device.

1.9.3 Alarm Output Port

1-channel relay alarm output (NO contact). Provide external power to external alarm device.
To avoid overloading, please read relay parameters sheet in the User's Manual carefully.
RS485 A/B cable is for the A/B cable of the PTZ decoder.
Alarm input 1 to alarm input 4. It becomes valid in low voltage.
A group of normal open activation output.
It is RS232 port to connect to the COM (debug), keyboard port and
transparent port (transfer COM input and output via the network).
RS485 communication port. They are used to control devices such
as PTZ. Please parallel connect 120
are too many PTZ decoders.
Figure 1-9
Ω between A/B cables if there
T
T
7