Alarm detector ground terminal (GND) and com-side parallel (alarm detectors by
external power supply);
Ground terminal and the ground terminal DVR alarm detector and then;
NC end alarm detector is connected to DVR alarm input terminal (ALARM);
When using an external power supply required for alarm equipment and DVR common
ground.
2.7.7 Alarm Output Port Description
2 channels alarm output (normally open contact), the need for external alarm device
power supply;
To avoid overload and damage the host, please refer to the relay relevant parameters
when connecting relay relevant parameters Annex.
2.7.8 Alarm output Relay terminal parameters
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