Dahua NVR100 series User Manual

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Dahua NVR100 series User Manual Manual pdf 145 page image

135Figure 2-83Note There are two alarm input types: NO/NC. When connect the ground port of the alarm device to the NVR, you can use any of the GND ports( ). Connect the NC port of the alarm device to the alarm input port (ALARM) of the NVR. When there is peripheral power supplying for the alarm device, please make sure it is earthed withthe NVR.2.3.3 Alarm input and output port There is peripheral power supplying for the external alarm device. In case overload may result in NVR damage, please refer to the following relay specifications fordetailed information. A/B cable of the RS485 is for the A/B cable connection of the speed PTZ.2.3.4 Alarm relay specificationsModel: JRC-27FMaterial of thetouchSilverRating（ResistanceLoad）Rated switch capacity 30VDC 2A, 125VAC 1AMaximum switch power 125VA 160WMaximum switch voltage 250VAC, 220VDCMaximum switch currency 1AInsulation Between touches with samepolarity 1000VAC 1minute