Dahua NVR4832-I User manual

P
AI Network Video Recorder
User’s Manual
V1.0.3
ZHEJIANG DAHUA VISION TECHNOLOGY CO., LTD.

Foreword I
Foreword
General
This user’s manual (hereinafter referred to be "the Manual") introduces the installation, functions
and operations of the AI Network Video Recorder (AI NVR) devices (hereinafter referred to be
"the Device").
Models
Series
Model
NVR4
NVR4832-I; NVR4432-I, NVR4416-16P-I; NVR4216-16P-I, NVR4216-I,
NVR4208-8P-I.
NVR5
NVR5864-I; NVR5832-I; NVR5432-16P-I; NVR5216-16P-I, NVR5216-8P-I.
Safety Instructions
The following categorized signal words with defined meaning might appear in the Manual.
Signal Words
Meaning
Indicates a potential risk which, if not avoided, may result in
property damage, data loss, lower performance, or unpredictable
result.
Electrostatic Sensitive Devices.
Indicates a device that is sensitive to electrostatic discharge.
Provides methods to help you solve a problem or save you time.
Provides additional information as the emphasis and supplement
to the text.
Revision History

Foreword II
Version
Revision Content
Release Time
V1.0.3
1. New GUI baseline, replaces all interfaces.
2. Adds AI functions.
July 2019
V1.0.2
Update the description of rear panel.
May 2019
V1.0.1
1. Adds NVR 5216-16P-I and NVR5216-8P-I.
Update relevant info.
2. Updates icons on the rear panel.
3. Adds video metadata function and
non-motor vehicle detection function.
September 2018
V1.0.0
First release.
—
Privacy Protection Notice
As the device user or data controller, you might collect personal data of others such as face,
fingerprints, car plate number, Email address, phone number, GPS and so on. You need to be in
compliance with the local privacy protection laws and regulations to protect the legitimate rights
and interests of other people by implementing measures including but not limited to: providing
clear and visible identification to inform data subject the existence of surveillance area and
providing related contact.
About the Manual
The Manual is for reference only. If there is inconsistency between the manual and the
actual product, the actual product shall prevail.
We are not liable for any loss caused by the operations that do not comply with the manual.
The manual would be updated according to the latest laws and regulations of related
regions. For detailed information, see the paper manual, CD-ROM, QR code or our official
website. If there is inconsistency between paper manual and the electronic version, the
electronic version shall prevail.
All the designs and software are subject to change without prior written notice. The product
updates might cause some differences between the actual product and the manual. Please
contact the customer service for the latest program and supplementary documentation.
There still might be deviation in technical data, functions and operations description, or
errors in print. If there is any doubt or dispute, please refer to our final explanation.
Upgrade the reader software or try other mainstream reader software if the manual (in PDF
format) cannot be opened.
All trademarks, registered trademarks and the company names in the manual are the
properties of their respective owners.
Please visit our website, contact the supplier or customer service if there is any problem
occurred when using the device.
If there is any uncertainty or controversy, please refer to our final explanation.

Important Safeguards and Warnings III
Important Safeguards and Warnings
The following description is the correct application method of the device. Read the manual
carefully before use to prevent danger and property loss. Strictly conform to the manual during
application and keep it properly after reading.
Operating Requirement
Install the PoE front-end device indoors.
The device does not support wall mount.
Do not place and install the device in an area exposed to direct sunlight or near heat
generating device.
Do not install the device in a humid, dusty or fuliginous area.
Keep its horizontal installation, or install it at stable places, and prevent it from falling.
Do not drip or splash liquids onto the device; do not put on the device anything filled with
liquids, in order to prevent liquids from flowing into the device.
Install the device at well-ventilated places; do not block its ventilation opening.
Use the device only within rated input and output range.
Do not dismantle the device arbitrarily.
Transport, use and store the device within allowed humidity and temperature range.
Power Requirement
Make sure to use the designated battery type. Otherwise there may be explosion risk.
Make sure to use batteries according to requirements. Otherwise, it may result in fire,
explosion or burning risks of batteries!
To replace batteries, only the same type of batteries can be used.
Make sure to dispose the exhausted batteries according to the instructions.
The product shall use electric wires (power wires) recommended by this area, which shall
be used within its rated specification.
Make sure to use standard power adapter matched with this device. Otherwise, the user
shall undertake resulting personnel injuries or device damages.
Use power supply that meets SELV (safety extra low voltage) requirements, and supply
power with rated voltage that conforms to Limited Power Source in IEC60950-1. For
specific power supply requirements, please refer to device labels.
Products with category I structure shall be connected to grid power output socket, which is
equipped with protective grounding.

Important Safeguards and Warnings IV
Appliance coupler is a disconnecting device. During normal use, please keep an angle that
facilitates operation.

Table of Contents I
Table of Contents
Foreword.......................................................................................................................................................I
Important Safeguards and Warnings..........................................................................................................III
1Features..............................................................................................................................................................1
1.1 Overview.....................................................................................................................................................1
1.2 Features......................................................................................................................................................1
2Front Panel and Rear Panel............................................................................................................................5
2.1 Front Panel.................................................................................................................................................5
2.2 Rear Panel .................................................................................................................................................5
2.2.1 NVR58-I/4832-I Series.....................................................................................................................5
2.2.2 NVR54-16P-I/4416-16P-I/4432-I Series.......................................................................................7
2.2.3 NVR52-16P-I/52-8P-I/42-16P-I Series..........................................................................................9
2.2.4 NVR4208-8P-I.................................................................................................................................11
2.2.5 NVR4216-I Series ..........................................................................................................................13
2.3 Alarm Connection....................................................................................................................................14
2.3.1 Alarm Port........................................................................................................................................14
2.3.2 Alarm Input Port..............................................................................................................................15
2.3.3 Alarm Output Port...........................................................................................................................16
2.3.4 Alarm Relay Specifications...........................................................................................................16
2.4 Bidirectional talk ......................................................................................................................................16
2.4.1 Device-end to PC-end ...................................................................................................................16
2.4.2 PC-end to the device-end.............................................................................................................17
2.5 Mouse Operation.....................................................................................................................................17
2.6 Remote Control .......................................................................................................................................18
3Device Installation...........................................................................................................................................21
3.1 Device Installation Diagrams.................................................................................................................21
3.2 Check Unpacked NVR............................................................................................................................21
3.3 About Front Panel and Rear Panel.......................................................................................................22
3.4 HDD Installation.......................................................................................................................................22
3.4.1 NVR58-I/54-16P-I/4832-I/4416-16P-I/4432-I Series.................................................................22
3.4.2 NVR52-16P-I/52-8P-I/4216-16P-I/4208-8P-I/4216-I Series.....................................................25
3.5 CD-ROM Installation...............................................................................................................................27
3.6 Connection Sample.................................................................................................................................28
3.6.1 NVR58-I/4832-I Series...................................................................................................................28
3.6.2 NVR54-16P-I/4416-16P-I/4432-I Series.....................................................................................29
3.6.3 NVR52-16P-I/52-8P-I/4216-16P-I/4208-8P-I/4216-I Series.....................................................29
4Local Basic Operations ..................................................................................................................................31
4.1 Getting Started.........................................................................................................................................31
4.1.1 Boot up.............................................................................................................................................31
4.1.2 Device Initialization ........................................................................................................................31
4.1.3 Reset Password..............................................................................................................................35

Table of Contents II
4.1.4 Quick Settings.................................................................................................................................42
4.2 Camera.....................................................................................................................................................69
4.2.1 Connection ......................................................................................................................................69
4.2.2 Remote Device Initialization .........................................................................................................73
4.2.3 Short-Cut Menu to Register Camera...........................................................................................77
4.2.4 Image ...............................................................................................................................................77
4.2.5 Encode.............................................................................................................................................80
4.2.6 Channel Name................................................................................................................................84
4.2.7 Remote Upgrade............................................................................................................................85
4.2.8 Remote Device Info........................................................................................................................86
4.3 Live View..................................................................................................................................................87
4.3.1 Preview............................................................................................................................................87
4.3.2 Navigation bar.................................................................................................................................88
4.3.3 Preview Control Interface..............................................................................................................91
4.3.4 Sequence.........................................................................................................................................96
4.3.5 Fisheye (Optional)..........................................................................................................................99
4.3.6 Test Temperature..........................................................................................................................101
4.3.7 AI Preview Mode ..........................................................................................................................102
4.4 PTZ..........................................................................................................................................................104
4.4.1 PTZ Settings..................................................................................................................................105
4.4.2 PTZ Control...................................................................................................................................107
4.4.3 Configuring PTZ Functions.........................................................................................................109
4.4.4 Calling PTZ Functions .................................................................................................................111
4.5 Record File.............................................................................................................................................112
4.6 Playback and Search............................................................................................................................112
4.6.1 Instant Playback ...........................................................................................................................113
4.6.2 Search Interface...........................................................................................................................113
4.6.3 Smart Search Playback...............................................................................................................118
4.6.4 Mark Playback ..............................................................................................................................119
4.6.5 Playback Image............................................................................................................................120
4.6.6 Splice Playback.............................................................................................................................120
4.6.7 File List...........................................................................................................................................121
4.6.8 Other Aux Functions...................................................................................................................122
4.7 AI..............................................................................................................................................................123
4.7.1 AI Search.......................................................................................................................................123
4.7.2 Parameters....................................................................................................................................136
4.7.3 Database .......................................................................................................................................182
4.8 Event Manager ......................................................................................................................................190
4.8.1 Alarm Info ......................................................................................................................................190
4.8.2 Alarm Status..................................................................................................................................191
4.8.3 Alarm Input....................................................................................................................................192
4.8.4 Alarm Control................................................................................................................................195
4.8.5 Video Detection ............................................................................................................................196
4.8.6 Audio Detect..................................................................................................................................204
4.8.7 Thermal Alarm ..............................................................................................................................207
4.8.8 Abnormality....................................................................................................................................210

Table of Contents III
4.9 POS.........................................................................................................................................................215
4.9.1 Search............................................................................................................................................215
4.9.2 Settings..........................................................................................................................................216
4.10 Operation and Maintenance................................................................................................................219
4.10.1 Log..................................................................................................................................................219
4.10.2 System...........................................................................................................................................221
4.10.3 Network..........................................................................................................................................224
4.10.4 Maintenance and Management..................................................................................................227
4.11 File Backup.............................................................................................................................................235
4.12 Network...................................................................................................................................................236
4.12.1 TCP/IP............................................................................................................................................236
4.12.2 Port.................................................................................................................................................238
4.12.3 PPPoE............................................................................................................................................239
4.12.4 DDNS.............................................................................................................................................240
4.12.5 UPnP..............................................................................................................................................242
4.12.6 Email...............................................................................................................................................244
4.12.7 SNMP.............................................................................................................................................246
4.12.8 Multicast.........................................................................................................................................248
4.12.9 Alarm Centre.................................................................................................................................249
4.12.10 Register..........................................................................................................................................250
4.12.11 P2P.................................................................................................................................................251
4.12.12 802.1X............................................................................................................................................253
4.13 Storage ...................................................................................................................................................255
4.13.1 Basic...............................................................................................................................................255
4.13.2 Schedule........................................................................................................................................256
4.13.3 HDD................................................................................................................................................256
4.13.4 Record Control..............................................................................................................................257
4.13.5 Advance (HDD Group).................................................................................................................257
4.13.6 HDD Detect...................................................................................................................................258
4.13.7 RAID...............................................................................................................................................261
4.13.8 Record Estimate...........................................................................................................................266
4.13.9 FTP.................................................................................................................................................268
4.14 System....................................................................................................................................................270
4.14.1 General ..........................................................................................................................................270
4.14.2 RS232............................................................................................................................................270
4.14.3 Security..........................................................................................................................................272
4.15 Account...................................................................................................................................................275
4.15.1 User................................................................................................................................................275
4.15.2 Group .............................................................................................................................................278
4.15.3 Reset Password............................................................................................................................279
4.15.4 ONVIF User...................................................................................................................................280
4.16 Output and Display................................................................................................................................282
4.16.1 Display ...........................................................................................................................................282
4.16.2 Tour.................................................................................................................................................283
4.16.3 Customized Display.....................................................................................................................285
4.17 Audio.......................................................................................................................................................287

Table of Contents IV
4.17.1 File Manage...................................................................................................................................287
4.17.2 Schedule........................................................................................................................................289
4.17.3 Broadcast.......................................................................................................................................290
4.18 USB Device Auto Pop-up.....................................................................................................................292
4.19 Shutdown................................................................................................................................................292
5Web Operations.............................................................................................................................................296
5.1 Network Connection..............................................................................................................................296
5.2 Web Login..............................................................................................................................................296
5.3 Reset Password ....................................................................................................................................297
5.4 Web Main Menu ....................................................................................................................................299
6Glossary..........................................................................................................................................................302
7FAQ.................................................................................................................................................................303
Appendix 1 HDD Capacity Calculation....................................................................................................307
Appendix 2 Compatible Network Camera List.........................................................................................308
Appendix 3 Cybersecurity Recommendations.........................................................................................312

Features 1
1 Features
1.1 Overview
This series NVR is a high performance network video recorder. This series product support local
preview, multiple-window display, recorded file local storage, remote control and mouse shortcut
menu operation, and remote management and control function.
This series product supports center storage, front-end storage and client-end storage. The
monitor zone in the front-end can be set in anywhere. Working with other front-end devices such
as IPC, NVS, this series product can establish a strong surveillance network via the CMS. In the
network system, there is only one network cable from the monitor center to the monitor zone in
the whole network. There is no audio/video cable from the monitor center to the monitor zone.
The whole project is featuring of simple connection, low-cost, low maintenance work.
This series NVR can be widely used in many areas such as public security, water conservancy,
transportation and education.
1.2 Features
AI Functions
Different models have different AI functions. The actual product shall prevail.
Face detection. It includes front-end smart detection and rear-end smart detection.
Face recognition. It enables users to compare the detected faces with the images in the
face library at real time.
Human body detection. System activates alarm actions once human body is detected.
People counting. It can effectively count the population number and flow direction.
Heat map. It can monitor the active objects in a specific area.
Automatic number plate recognition (ANPR). It can effectively monitor the passing vehicles.
Smart Playback
IVS playback. It can screen out and replay the records meeting the set rules.
Face detection playback. It can screen out and replay the records with human faces.
Face recognition playback. It can compare the face information in the video with the
information in the database and replay the corresponding records.
ANPR playback. It can screen out the record with a specific car plate number or all the
records with car plate numbers.
Human body detection playback. It can screen out and replay the records with specific
human bodies.

Features 2
Smart Search. It includes smart functions such as searching by attribute and searching by
image to enable users to get target records quickly.
Cloud Upgrade
For the NVR connected to the Internet, it supports application online upgrade.
Real-Time Surveillance
VGA, HDMI port. Connect to monitor to realize real-time surveillance. Some series support
TV/VGA/HDMI output at the same time.
Short-cut menu for preview.
Support multiple popular PTZ decoder control protocols. Support preset, tour and pattern.
Playback
Support independent real-time recording for each channel. At the same time it supports
functions such as smart search, forward play, network monitor, record search and
download.
Support various playback modes: slow play, fast play, backward play and frame-by-frame
play.
Support time title overlay so that you can view the event accurate occurred time.
Support specified zone enlargement.
User Management
Each group has an authority collection which can be edited freely and belongs to the total
authority collection. The authorities of any user in the group cannot be larger than that of the
group.
Storage
Via corresponding settings (such as alarm settings and schedule settings), you can back up
related audio/video data in the network video recorder.
You can take records via the Web and the record files are saved on the PC in which the
client locates.
Alarm
Respond to external alarm simultaneously (within 200MS). Based on user’s pre-defined
relay settings, the system can process the alarm input correctly and sends user screen or
voice prompts (supporting pre-recorded audio).

Features 3
Support settings of the central alarm server, so that the system can automatically notify
users of the alarm information. Alarm input can be derived from various connected
peripheral devices.
Alert you of alarm information via email.
Network Surveillance
Send audio/video data compressed by IPC or NVS to client-ends through the network, and
then the data will be decompressed and displayed.
Support max 128 connections at the same time.
Transmit audio/video data by protocols such as HTTP, TCP, UDP, MULTICAST and
RTP/RTCP.
Transmit some alarm data or alarm info by SNMP.
Support WEB access in WAN/LAN.
Window Split
Adopt video compression and digital processing to display several windows in one monitor.
Support 1/4/8/9/16/ 25/36 window split in preview and 1/4/9/16 window split in playback.
Record
Support regular record, motion record, alarm record and smart record. Save the recorded files in
the HDD, USB device, client-end PC or network storage server and you can search or playback
the saved files at the local-end or via the Web/USB devices.
Backup
Support network backup and USB record backup. You can back up the record files in devices
such as network storage server, peripheral USB2.0 device and burner.
Network Management
Supervise NVR configuration and control power via Ethernet.
Support Web management.
Peripheral Equipment Management
Support peripheral device control and you can freely set the control protocol and connection
port.
Support transparent data transmission such as RS232 (RS-422) and RS485 (RS-485).
Auxiliary

Features 4
Support switch between NTSC and PAL.
Support real-time display of system resources information and running status.
Support log record.
Local GUI output. Shortcut menu operation with the mouse.
IR control function (for some series only). Shortcut menu operation with remote control.
Support to play the video/audio files from remote IPC or NVS.
For description of other function, see the following contents.

Front Panel and Rear Panel 5
2 Front Panel and Rear Panel
The following front panel and rear panel figures are for reference only. The actual product shall prevail.
2.1 Front Panel
Figure 2-1 takes NVR5864-I and NVR5832-I series as examples.
Figure 2-2 takes NVR5432-16P-I/5216-16P-I/5216-8P-I series as examples.
These two figures are for reference only. The actual product shall prevail.
Figure 2-1
Figure 2-2
Table 2-1
No.
Port Name
Function
1
USB port
Connects to the external devices such as
keyboard, mouse, and USB storage device.
2
IR indicator
Receive signals from the remote control.
2.2 Rear Panel
2.2.1 NVR58-I/4832-I Series
The figure takes NVR5864-I/5832-I series as examples.
The figure is for reference only. The actual product shall prevail.

Front Panel and Rear Panel 6
Figure 2-3
Table 2-2
No.
Port Name
Function
1
Power button
Turns on/off the NVR.
2
eSATA port
External SATA port. It can connect device with SATA port.
You need to jump the HDD when there is peripherally
connected HDD.
3
VGA port
VGA video output port. Output analog video signal. It can
connect to the monitor to view analog video.
4
RS232 port
It is for general COM debugging to configure IP address and
transfer transparent COM data.
5
Alarm input port
(1-16)
There are four groups: 1-4, 5-8, 9-12 and 13-16.
They receive signals from external alarm source. Alarm
input includes two types; NO (normal open) and NC
(normal close).
When your alarm input device is using external power,
make sure the device and the NVR have the same
GND.
Alarm output port
(NO1-NO5, C1-C5,
NC5)
Five groups of alarm output ports (Group 1: NO1-C1,
Group 2: NO2-C2, Group 3: NO3-C3, Group 4:
NO4-C4, Group 5: NO5, C5, NC5).Output alarm signal
to the external alarm device. Make sure power supply is
available for the external alarm device.
NO: Normal open alarm output port.
C: Alarm output public end.
NC: Normal close alarm output port.
GND.Alarm input ground port.
RS485 port (A, B)
RS485_A port. Control cable A of the 485 device. It
connects external devices such as speed dome and
PTZ.
RS485_B port. Control cable B of the 485 device. It
connects external devices such as speed dome and
PTZ.
CTRL
Controllable 12V power output. It is to control the on-off
alarm relay output. It can be used to control the device
alarm output. At the same time, it can also be used as the

Front Panel and Rear Panel 7
No.
Port Name
Function
power input source of some devices such as alarm detector.
+12V power output port. It can provide power to some
peripheral devices such as camera and alarm device. Make
sure the power supply of peripheral device shall be below
1A.
6
MIC IN
Bidirectional talk input port. It is to receive analog audio
signal from devices such as microphone, sound pickup.
MIC OUT
Audio output port. It is to output analog audio signal to
devices such as sound box.
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
7
HDMI port
High definition audio and video signal output port. It
transmits uncompressed high definition video and
multiple-channel audio data to displays with HDMI port. The
two HDMI ports support 2-channel high definition HDMI
output of different sources.
8
USB port
USB3.0 port. Connect to devices such as mouse, USB
storage device and USB burner.
9
Network port
10M/100M/1000Mbps self-adaptive Ethernet port. Connect
to the network cable.
10
Power input port
Input power of 100V-240V and 50Hz-60Hz.
11
GND.
2.2.2 NVR54-16P-I/4416-16P-I/4432-I Series
Figure 2-4 takes NVR5432-16P-I series as examples.
The figure is for reference only. The actual product shall prevail.
Figure 2-4
Table 2-3
No.
Port Name
Function
1
Power button
Turns on/off the NVR.

Front Panel and Rear Panel 8
No.
Port Name
Function
2
PoE port
Built-in switch. It can provide power for IPC.
16 PoE ports: 1-8 are ePoE ports (support 300m @
100M. 800m @ 10M). 9-16 are regular PoE ports.
Device with 16 PoEs supports 150W total power.
3
eSATA port
External SATA port. It can connect device with SATA port.
You need to jump the HDD when there is peripherally
connected HDD.
4
HDMI port
High definition audio and video signal output port. It
transmits uncompressed high definition video and
multiple-channel audio data to displays with HDMI port. The
two HDMI ports support 2-channel high definition HDMI
output of different sources.
5
VGA port
VGA video output port. Output analog video signal. It can
connect to the monitor to view analog video.
6
RS232 port
It is for general COM debugging to configure IP address and
transfer transparent COM data.
7
Alarm input port
(1-16)
There are four groups: 1-4, 5-8, 9-12 and 13-16.
They receive signals from external alarm source. Alarm
input includes two types; NO (normal open) and NC
(normal close).
When your alarm input device is using external power,
make sure the device and the NVR have the same
GND.
Alarm output port
(NO1-NO5, C1-C5,
NC5)
Five groups of alarm output ports (Group 1: NO1-C1,
Group 2: NO2-C2, Group 3: NO3-C3, Group 4:
NO4-C4, Group 5: NO5, C5, NC5).Output alarm signal
to the external alarm device. Make sure power supply is
available for the external alarm device.
NO: Normal open alarm output port.
C: Alarm output public end.
NC: Normal close alarm output port.
GND.Alarm input ground port.
RS485 port (A, B)
RS485_A port. Control cable A of the 485 device. It
connects external devices such as speed dome and
PTZ.
RS485_B port. Control cable B of the 485 device. It
connects external devices such as speed dome and
PTZ.
CTRL
Controllable 12V power output. It is to control the on-off
alarm relay output. It can be used to control the device
alarm output. At the same time, it can also be used as the
power input source of some devices such as alarm detector.
+12V power output port. It can provide power to some
peripheral devices such as camera and alarm device. Make
sure the power supply of peripheral device shall be below
1A.

Front Panel and Rear Panel 9
No.
Port Name
Function
8
MIC IN
Bidirectional talk input port. It is to receive analog audio
signal from devices such as microphone, sound pickup.
MIC OUT
Audio output port. It is to output analog audio signal to
devices such as sound box.
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
9
USB port
USB3.0 port. Connect to devices such as mouse, USB
storage device and USB burner.
10
Network port
10M/100M/1000Mbps self-adaptive Ethernet port. Connect
to the network cable.
11
Power input port
Input power of 100V-240V and 50Hz-60Hz.
12
GND.
2.2.3 NVR52-16P-I/52-8P-I/42-16P-I Series
These figures are for reference only. The actual product shall prevail.
Figure 2-5 NVR5216-16P-I
Figure 2-6 NVR5216-8P-I

Front Panel and Rear Panel 10
Figure 2-7 NVR4216-16P-I
Table 2-4
No.
Port Name
Function
1
Power input
port
Input power of 100V-240V and 50Hz-60Hz.
2
Power button
Turns on/off the NVR.
3
PoE port
Built-in switch. It can provide power for IPC.
16 PoE ports: 1-8 are ePoE ports (support 300m @ 100M. 800m
@ 10M). 9-16 are regular PoE ports. The device supports 150W
total power.
8 PoE ports: 1-8 are ePoE ports (support 300m @ 100M. 800m @
10M). The device supports 48V, 120W total power.
4
Alarm
input/output of
NVR52-16P-I
and 52-8P-I
Alarm
input port
(1-4)
They receive signals from external alarm source.
Alarm input includes two types; NO (normal open)
and NC (normal close).
When your alarm input device is using external
power, make sure the device and the NVR have
the same GND.
Alarm
output
port
(NO1-NO
2, C1-C2)
Two groups of alarm output ports (Group 1:
NO1-C1, Group 2: NO2-C2). Output alarm signal
to the external alarm device. Make sure power
supply is available for the external alarm device.
NO: Normal open alarm output port.
C: Alarm output public end.
GND. Alarm input ground port.
RS485
port (A,
B)
RS485_A port. Control cable A of the 485 device.
It connects external devices such as speed dome
and PTZ.
RS485_B port. Control cable B of the 485 device.
It connects external devices such as speed dome
and PTZ.

Front Panel and Rear Panel 11
No.
Port Name
Function
Alarm
input/output of
NVR4216-16
P-I
Alarm
input port
(1-4)
They receive signals from external alarm source.
Alarm input includes two types; NO (normal open)
and NC (normal close).
When your alarm input device is using external
power, make sure the device and the NVR have
the same GND.
Alarm
output
port
(NO1,
C1)
One group of alarm output ports (Group 1:
NO1-C1). Output alarm signal to the external
alarm device. Make sure power supply is
available for the external alarm device.
NO: Normal open alarm output port.
C: Alarm output public end.
GND. Alarm input ground port.
CTRL
Controllable 12V power output. It is to control the
on-off alarm relay output. It can be used to control the
device alarm output. At the same time, it can also be
used as the power input source of some devices such
as alarm detector.
P
+12V power output port. It can provide power to some
peripheral devices such as camera and alarm device.
Make sure the power supply of peripheral device shall
be below 1A.
5
HDMI port
High definition audio and video signal output port. It transmits
uncompressed high definition video and multiple-channel audio
data to displays with HDMI port.
6
USB port
USB3.0 port. Connect to devices such as mouse, USB storage
device and USB burner.
7
Network port
10M/100M/1000Mbps self-adaptive Ethernet port. Connect to the
network cable.
8
MIC IN
Bidirectional talk input port. It is to receive analog audio signal from
devices such as microphone, sound pickup.
MIC OUT
Audio output port. It is to output analog audio signal to devices
such as sound box.
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
9
VGA port
VGA video output port. Output analog video signal. It can connect
to the monitor to view analog video.
10
RS232 port
It is for general COM debugging to configure IP address and
transfer transparent COM data.
11
GND.
2.2.4 NVR4208-8P-I
The figure is for reference only. The actual product shall prevail.