Dahua NVR4208-8P-I User Manual

Front Panel and Rear Panel 16
( ).
 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, make sure it is earthed with the NVR.
2.3.3 Alarm Output Port
 There is peripheral power supplying for the external alarm device.
 In case overload may result in NVR damage, 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.
2.3.4 Alarm Relay Specifications
Table 2-8
Model:
JRC-27F
Material of the
touch
Silver
Rating
(resistance
load)
Rated switch capacity
30VDC 2A, 125VAC 1A
Maximum switch power
125VA 160W
Maximum switch voltage
250VAC, 220VDC
Maximum switch currency
1A
Insulation
Between touches with same
polarity
1000VAC 1 minute
Between touches with different
polarity
1000VAC 1minute
Between touch and winding
1000VAC 1minute
Surge voltage
Between touches with same
polarity
1500V (10×160us)
Length of open
time
3ms max
Length of close
time
3ms max
Longevity
Mechanical
50×106 MIN (3Hz)
Electrical
200×103 MIN (0.5Hz)
Temperature
-40°C–+70°C
2.4 Bidirectional talk
2.4.1 Device-end to PC-end
Device Connection
Connect the speaker or the pickup to the first audio input port in the device rear panel. Then connect the
earphone or the sound box to the audio output port in the PC.
Login the Web and then enable the corresponding channel real-time monitor.
Refer to the following interface to enable bidirectional talk. See Figure 2-12.

Dahua NVR4208-8P-I Specifications

General

Brand	Dahua
Model	NVR4208-8P-I
Category	DVR
Language	English