9
2.3
Alarm Connection
2.3.1 Alarm Port
The alarm port is shown as below. See Figure 2-3.
Figure 2-3
Icon
Function
1
～
4
ALARM1
～
ALARM4. The alarm becomes activated in the
low level.
N1,N2,C1,C2
Two N activation output groups. (On-off button)
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.
2.3.2 Alarm input port
Connect the positive end (+) of the alarm input device to the alarm input port (ALARM IN 1
～
4) of the
NVR. Connect the negative end (-) of the alarm input device to the ground end ( ) of the NVR.
Note
When connect the ground port of the alarm device to the NVR, you can use any of the GND ports
(
).
Connect the C 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.
In case overload may result in NVR damage, please refer to the following relay specifications for
detailed information.
A/B cable of the RS485 is for the A/B cable connection of the speed PTZ.
Summary of Contents for K-NL408KT/G
Page 1: ...Network Disk Recorder User s Manual Model No K NL408KT G Version 1 0 1 ...
Page 24: ...18 3 4 Connection Sample Please refer to Figure 3 1 for connection sample Figure 3 1 ...
Page 34: ...28 ...
Page 73: ...67 Figure 4 61 Figure 4 62 ...
Page 94: ...88 Figure 4 78 Figure 4 79 ...
Page 95: ...89 Figure 4 80 Figure 4 81 ...
Page 103: ...97 Figure 4 87 Figure 4 88 ...
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Page 105: ...99 Figure 4 91 Figure 4 92 ...
Page 108: ...102 Figure 4 94 Figure 4 95 ...
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Page 117: ...111 Figure 4 104 Figure 4 105 ...
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Page 146: ...140 Figure 4 136 ...
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Page 151: ...145 Figure 4 140 Step 2 Click Add user button Enter Add user interface See Figure 2 141 ...
Page 156: ...150 Figure 4 144 1 Figure 4 144 2 ...
Page 158: ...152 Figure 4 146 ...
Page 162: ...156 Please input your username and password ...
Page 163: ...157 Figure 5 3 ...
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