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VDH-NK800 Hardware Manual 2. (c) When the alarm device is shared with two NVRs or connected to a NVR and other devices, it should be isolated by relays. Alarm OUT The alarm output of the NVR can not be connected with high-power load (no more than 1A). In the output circuit, be careful about the excessive current that may cause damage to the relay. When using high-power load, extra relays are needed. 8
