From Dahua Wiki

Jump to: navigation, search







  • H.265 and H.264 Video Compression
  • Maximum 200 Mbps Incoming Bandwidth
  • Up to 8 MP Resolution for Preview and Playback
  • Simultaneous HDMI and VGA Video Output
  • Support for IPC and UPnP Protocols
  • Eight (8) PoE Ports
  • Support for Automatic Network Replenishment (ANR) Technology



Firmware Update Instructions

Firmware Update Download

Front Panel

HCVR42XXA-S2HCVR4216AN-S2 HCVR52XXA-S2 Front Panel.jpg

Back Panel

NVR42/42-P/42-8P Series

The NVR42 series rear panel is shown as below.


The NVR42-P series rear panel is shown as below.


The NVR42-8P series rear panel is shown as below.




Power switch

Power on/off button.

Power input port

Input DC 12V/5A.

For NVR42 series product only.

Switch power port. Input DC 48//1.04A.

For NVR42-P series product only.

Input AC 100~240V.

For NVR42-8P series product only.


Audio input port

Bidirectional talk input port. It is to receive the analog audio signal output from the devices such as microphone, pickup.


Audio output port

Audio output port. It is to output the analog audio signal to the devices such as the sound box.

  • Bidirectional talk output.
  • Audio output on 1-window video monitor.
  • Audio output on 1-window video playback.


Alarm input port 1~4

  • 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 NVR have the same ground.


Alarm input ground port.

N1, N2

Alarm output port


  • 2 groups of alarm output ports. (Group 1:port NO1~C1,Group 2:port NO2~C2).Output alarm signal to the alarm device. Please make sure there is power to the external alarm device.
  • NO:Normal open alarm output port.
  • C:Alarm output public end.

C1, C2


RS-485 communication port

RS485_A port. It is the cable A. You can connect to the control devices such as speed dome PTZ.


RS485_B.It is the cable B. You can connect to the control devices such as speed dome PTZ.

Network port

10M/100M/1000Mbps self-adaptive Ethernet port. Connect to the network cable.

  • 0 port

USB2.0 port. Connect to mouse, USB storage device, USB burner and etc.


RS-232 debug COM.

It is for general COM debug to configure IP address or transfer transparent COM data.


High Definition Media Interface

High definition audio and video signal output port. It transmits uncompressed high definition video and multiple-channel data to the HDMI port of the display device. HDMI version is 1.4.


VGA video output port

VGA video output port. Output analog video signal. It can connect to the monitor to view analog video.



Bult-in Switch. Support PoE.

The 4 PoE series product supports total 48V 50W.

The 8 PoE series product supports total 48V 120W. One PoE port max supports 15W.


Main Processor Embedded Quad-core Processor
Operating System Embedded Linux
Audio and Video  
IP Camera Input Eight (8) Channels
Two-way Talk Input: One (1) Channel, RCA
  Output: One (1) Channe, RCA
Interface One (1) HDMI
  One (1) VGA
Resolution 3840 x 2160, 1920 x 1080, 1280 x 1024,
  1280 x 720, 1024 x 768
Multi-screen Display 1/4/8/9
On-screen Display Camera Title, Time, Video Loss, Camera Lock, Motion Detection, Recording
Compression H.265, H.264, MJPEG
Resolution 8 MP, 6 MP, 5 MP, 4 MP, 3 MP, 1080p, 1.3 MP, 720p, D1, CIF,
Record Rate 200 Mbps
Bit Rate 16 Kbps to 20 Mbps per channel
Record Mode Manual, Schedule (Regular, Continuous), Motion Detection (Video Detection, Motion Detection, Tampering, Video Loss), Stop
Record Interval 1 to 120 minutes (default: 60 minutes)
  Pre-record: 1 to 30 s
  Post-record: 10 to 300 s
Video Detection and Alarm  
Trigger Events Recording, PTZ, Tour, Alarm Out, Video Push, Email, FTP, Snapshot, Buzzer and Screen Tips
Video Detection Motion Detection, MD Zones: 396 (22 x 18), Video Loss and Tampering
Alarm Input Four (4) Channels,
  Low Level Effective, Green Terminal Interface
Relay Output Two (2) Channels,
  NO/NC Programmable, Green Terminal Interface
Playback and Backup  
Sync Playback 1/4/8
Search Mode Time/Date, Alarm, MD and Exact Search (accurate to one second), Smart Search
Playback Function Play, Pause, Stop, Rewind, Fast Play, Slow Play,
  Next File, Previous File, Next Camera,
  Previous Camera, Full Screen, Repeat, Shuffle,
  Backup Selection, Digital Zoom
Backup Mode USB Device, Network
Third-party Support Dahua, Arecont Vision, AXIS, Bosch, Brickcom, Canon, CP Plus, Dynacolor, Honeywell, Panasonic, Pelco, Samsung, Sanyo, Sony, Videotec, Vivotek, and others
Interface One (1) RJ-45 Port (10/100/1000 Mbps)
Ethernet Port One (1) Independent 1000 Mbps Ethernet Port
PoE Eight (8) Ports (IEEE802.3af/at)
Network Function HTTP, HTTPs, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, IP Search (Support for Dahua IP cameras, DVRs, NVS)
Maximum User Access 128 Users
Mobile Operating System IOS, Android
Interoperability ONVIF 2.4, CGI Conformant
Internal HDD Two (2) SATA III Ports,
  Up to 6 TB capacity for each HDD
HDD Mode Single
Auxiliary Interface  
USB One (1) USB 3.0 Port
  One (1) USB 2.0 Port
Power Supply 100 VAC to 240 VAC, 50/60 Hz
Power Consumption NVR: < 9.6 W, without HDD