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considered as an alarm input; ALARM IN port disconnect with GND or has a high voltage (5V) input will be
considered as no alarm input by default;
Fig. 3
Note: external input voltage can not be higher than 5V.
Alarm out
Alarm output is NO/NC output, and this DVR has 1 port for alarm output.
When “NO1” and “COM1” was off, the alarm output disables, otherwise “NO1” and “COM1” was connected,
the alarm output enable.
Fig. 4
Note: 24VDC(1A), 120VAC(1A) voltage and current are suggested.
Section 5 PTZ (pan, tilt and zoom) control connection
Fig. 5
