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Comparison Dahua DH-NVR1A04HS-4P vs Dahua NVR1A04-4P

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Dahua DH-NVR1A04HS-4P
Dahua NVR1A04-4P
Dahua DH-NVR1A04HS-4PDahua NVR1A04-4P
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Typedigital NVRdigital NVR
Camera connection4 channels4 channels
Features
Features
motion response
mobile app
motion response
mobile app
Connectors
RCA audio input11
RCA audio output11
USB 2.022
HDMI11
VGA11
LAN
/4 PoE ports/
/4 PoE ports/
Video recording
Bandwidth80/- Mbps
Video compression formatH.264+, H.264H.264+, H.264
Max. resolution (IP)6 MP (~3072x2048 px)6 MP (~3072x2048 px)
Drives
Number of SATA11
Max. total capacity6 TB8 TB
PoE power
PoE (output)802.3af/at802.3af/at
PoE outputs44
Power per PoE output25.5 W25.5 W
Total PoE power50 W
General
Power supply48В48В
Power consumption4 W4 W
Operating temperature-10 °С ~ +55 °С-10 °С ~ +55 °С
Maximum humidity90 %90 %
ONVIF
CMS
Dimensions260x225x48 mm205x205x46 mm
Weight0.8 kg0.45 kg
Added to E-Catalogfebruary 2018february 2018

Bandwidth

The maximum data stream in Mbit/s that the NVR is capable of processing when recording and displaying. The throughput parameter is specified as the maximum incoming/outgoing speed, or as the sum of incoming and outgoing streams (total throughput). It is calculated in such a way that the throughput exceeds the total flow of all IP cameras connected to the DVR, and another 25–30% is put in reserve for playing video or viewing it via network access.

Max. total capacity

The largest total storage capacity with which the recorder is able to work correctly. By default, it is indicated only for internal media with a SATA interface (see above), however, in some models, data is also provided separately for external devices connected via eSATA.

Note that the limit on the total capacity follows from the fact that each individual port has its own limit on the capacity of the drive. In this case, the maximum capacity is distributed equally between the ports. This should be taken into account when choosing drives for the registrar: for example, in a 32 TB model with 8 SATA connectors, the limit for each connector will be 32/8 = 4 TB. This means that installing two internal 8 TB disks in such a registrar will not work, although their total capacity will be less than the maximum.

Total PoE power

The total power that the NVR is capable of delivering to all PoE outputs.

See above for details on such exits; here we only recall that the general idea of PoE is to supply power over the same Ethernet cable that transmits data. The total power is given for models in which there are more than one such connectors; it allows you to estimate the total power consumption of all PoE devices that can be connected to the NVR at the same time.

There are two important things to keep in mind when choosing a specific value. First, when multiple ports operate, the energy is usually shared equally among them; at the same time, the total power of the registrar does not always correspond to the sum of the maximum powers of all PoE outputs. For example, a model with 8 ports of 30 W each may have a total figure of not 240 W (8 * 30 W), but only 100 W. In fact, this discrepancy means that with the simultaneous use of all connectors, each of them will be able to deliver not 30 W, but a maximum of 100/8 = 12.5 W. The second point is that the total power consumption of the load should ideally be no higher than 75% of the claimed total PoE power — this provides an additional guarantee in case of malfunctions.
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