IC Realtime NVR-708NS Product Manual - Page 25

Figure 2-6 Please refer to the following sheet for detailed information. Port Name Connection Function Power button Power on/off button. Power input port MIC IN Audio input port MIC OUT Audio output port 1-16 Alarm input port 1-16. I/O port NO1 to NO5 C1 to C5 Ground end 5-ch alarm output port NC5 A RS485 port Input AC 220V power. Bidirectional talk input port. It is to receive the analog audio signal output from the devices such as mike phone, pickup. Audio output port. It is to output the analog audio signal to the devices such as the sound box. „ There are four groups. The first group is from port 1 to port 4, the second group is from port 5 to port 8, the third group is from 9 to 12, and the fourth group is from 13 to 16. They are to receive the signal from the external alarm source. There are two types; NO (normal open)/NC (normal close). „ When your alarm input device is using external power, please make sure the device and the NVS have the same ground. Alarm input ground end. z 5 groups of alarm output ports. (Group 1： port NO1～C1,Group 2:port NO2～ C2,Group 3:port NO3～C3, Group 4：port NO4～C4, Group 5: port NO5, C5, NC5).Output alarm signal to the alarm device. Please make sure there is power to the external alarm device. z NO: Normal open alarm output port. z C: Alarm output public end. z NC: Normal close alarm output port. RS485_A port. It is the cable A. You can connect to the control devices such as speed dome PTZ. 16