127
canceled. Current is 500mA.
＋
12V
Rated current output. Current is 500mA.
GND
A/B
485 communication port. They are used to control devices
such as PTZ. Please parallel connect 120T
Ω between A/B
cables if there are too many PTZ decoders.
Note
Different models support different alarm input ports. Please refer to the specifications sheet for
detailed information.
Slight difference may be found on the alarm port layout.
2.3.2
Alarm input port
Connect the positive end (+) of the alarm input device to the alarm input port (ALARM IN 1
～
16) of the
NVR. Connect the negative end (-) of the alarm input device to the ground end (
) of the NVR.
Figure 2-81
Note
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 with
the NVR.
2.3.3
Alarm input and output port
There is peripheral power supplying for the external alarm device.
Содержание nvr4208-8p
Страница 1: ...Dahua Network Video Recorder User s Manual V 2 7 0 ...
Страница 159: ...144 Figure 3 3 3 5 4 NVR11HS 41HS W S2 Series Please refer to Figure 3 4 for connection sample ...
Страница 160: ...145 Figure 3 4 3 5 5 NVR41HS W S2 Series Please refer to Figure 3 5 for connection sample ...
Страница 163: ...148 Figure 3 7 3 5 8 NVR42N Series Please refer to Figure 3 8 for connection sample Figure 3 8 ...
Страница 171: ...156 Figure 3 18 3 5 19 NVR78 Series Please refer to Figure 3 19 for connection sample ...
Страница 172: ...157 Figure 3 19 3 5 20 NVR78 16P Series Please refer to Figure 3 20 for connection sample ...
Страница 173: ...158 Figure 3 20 3 5 21 NVR78 RH Series Please refer to Figure 3 21 for connection sample ...
Страница 174: ...159 Figure 3 21 3 5 22 NVR70 Series Please refer to Figure 3 22 for connection sample ...
Страница 175: ...160 Figure 3 22 3 5 23 NVR70 R Series Please refer to Figure 3 23 for connection sample ...
Страница 176: ...161 Figure 3 23 3 5 24 NVR42V 8P Series Please refer to Figure 3 24 for connection sample ...
Страница 177: ...162 Figure 3 24 ...
Страница 188: ...173 Figure 4 19 Click smart add button you can see device enables DHCP function See Figure 4 20 Figure 4 20 ...
Страница 243: ...228 Figure 4 89 Figure 4 90 ...
Страница 244: ...229 Figure 4 91 Figure 4 92 ...
Страница 259: ...244 Figure 4 110 Figure 4 111 ...
Страница 260: ...245 Figure 4 112 Figure 4 113 ...
Страница 261: ...246 Figure 4 114 Figure 4 115 ...
Страница 263: ...248 Figure 4 117 Figure 4 118 ...
Страница 290: ...275 Figure 4 148 In Figure 4 148 click one HDD item the S M A R T interface is shown as in Figure 4 149 Figure 4 149 ...
Страница 355: ...340 Figure 5 55 Figure 5 56 ...
Страница 356: ...341 Figure 5 57 Figure 5 58 Figure 5 59 ...
Страница 367: ...352 Figure 5 73 Figure 5 74 ...
