Dahua nvs0104dh Quick Start Manual

Dahua nvs0104dh Quick Start Manual Manual pdf 43 page image

384 Alarm Input and OutputBefore device connection, please make sure: Alarm InputPlease check the alarm type (Normal open/normal close) first. Then set decoder networkalarm type. Set decoder alarm type as NO (Normal Open) if it is ground alarm, otherwiseset it as NC (Normal Close).Please note alarm input is active in low voltage, please ground it.Please use a relay to separate devices, when there are two decoders, or there is onedecoder and one another device. Alarm OutputDo not connect the alarm output port to high power load directly (It shall be less than 1A);it may result in heavy current which may destroy the relay. Please use co contactor torealize the connection between the alarm output port and the load. Sound GroundPlease make sure the front-end device has earthed. Otherwise it may result in chipdamage.Alarm input type can be NO (normal open) or NC (normal close).The 1-channel 4K series product interface is shown as in Figure 4-1.Figure 4-1Parameter 9-channel high definition standard seriesAB A/B cable of the control device.GND port1~4 Alarm input portC1-C4；NO1-NO4 Alarm output port (NO)The 1/4-channel high definition series product interface is shown as in Figure 4-2.