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Technical Specifications

Hikvision DS-7732NXI-I4/S(E) 32-Channel AcuSense 4K NVR

The Hikvision DS-7732NXI-I4/S(E) is a 32-channel AcuSense network video recorder designed for larger IP surveillance systems that need powerful recording, intelligent search, facial recognition, perimeter protection, and high-resolution video output.

With support for up to 32 IP camera inputs, 256 Mbps incoming and outgoing bandwidth, H.265+ compression, 4K HDMI output, and Hikvision deep-learning analytics, it provides a centralized platform for recording and reviewing security video across demanding residential, commercial, retail, and multi-camera installations.

Advanced functions include AcuSearch, Motion Detection 2.0, human and vehicle classification, facial recognition, compatible-camera ANPR, smart playback, POS integration, and support for high-resolution cameras up to 32 MP.

Key Features

  • Up to 32-channel IP camera input.
  • H.265+/H.265/H.264+/H.264 video compression formats.
  • H.265+ compression can reduce storage requirements by up to 75%.
  • Intelligent analytics powered by deep-learning algorithms.
  • Up to 4-channel perimeter protection by the NVR.
  • Human and vehicle recognition designed to reduce false alarms.
  • Up to 4-channel facial recognition for video streams.
  • Up to 8-channel face picture comparison from cameras.
  • Up to 16 face-picture libraries containing up to 50,000 face pictures total.
  • AcuSearch support across all channels when used with compatible Hikvision AcuSense cameras.
  • AcuSearch modeling capacity of up to 172,800 targets per day.
  • Motion Detection 2.0 across all channels for Hikvision cameras.
  • ANPR support through compatible cameras across all channels.
  • Vehicle attribute recognition including vehicle brand, color, and type.
  • License plate attributes including plate number, color, and type.
  • 256 Mbps incoming bandwidth.
  • 256 Mbps outgoing bandwidth.
  • Supports recording resolutions up to 32 MP.
  • Supports up to four 32 MP/24 MP IP video inputs.
  • HDMI output supporting up to 4K 3840 × 2160 at 60 Hz.
  • Independent HDMI and VGA video-output capabilities.
  • Dual-stream recording support.
  • Smart search and smart playback functions.
  • POS information overlay on live view and playback.
  • POS-triggered recording and alarm support.
  • Heat-map camera data recording and presentation.
  • Up to 128 remote connections.
  • Hik-Connect support for network management.
  • ONVIF, RTSP, SDK, and ISAPI integration support.
  • Alarm inputs and outputs for integration with external alarm devices.
  • 19-inch rack-mountable chassis.

Intelligent Analytics

AI by Device
Facial recognition, perimeter protection, Motion Detection 2.0, AcuSearch
AI by Camera
Facial recognition, perimeter protection, video structuralization, throwing objects from building, Motion Detection 2.0, ANPR, people counting, VCA
AI Engine
1 engine; engine mode is adjustable

AcuSearch

Performance
When cameras support Hikvision AcuSense Technology and have AcuSearch enabled, the NVR supports AcuSearch across all channels and can model up to 172,800 targets per day.

Perimeter Protection

By Device
4-channel, 2 MP H.264/H.265 video analysis for human and vehicle recognition to reduce false alarms; up to 12 rules total.
By Camera
All channels

Facial Recognition

Facial Detection and Analytics
Face picture comparison, human face capture, face picture search
Face Attributes
Wearing glasses, wearing a mask, facial expression, body temperature
Face Picture Library
Up to 16 face-picture libraries with up to 50,000 face pictures total. Each picture ≤ 512 KB; total capacity ≤ 1 GB.
Face Picture Comparison — Captured from Camera
8-channel
Facial Detection and Analytics Performance
4-channel human face capture using HD network cameras up to 2 MP, H.264/H.265

Motion Detection 2.0

By Device
All channels for Hikvision cameras
By Camera
All channels

ANPR

ANPR by Camera
All channels
Vehicle Attributes
Vehicle brand, vehicle color, vehicle type
Plate Attributes
Plate number, license plate color, license plate type
Supported Countries & Regions
Myanmar, Philippines, Indonesia, Vietnam, Pakistan, New Zealand, Australia, Sri Lanka, Singapore, Malaysia, Turkey, Croatia, Slovakia, Czech Republic, Bulgaria, Macedonia, Hungary, Greece, Poland, France, Netherlands, Switzerland, Spain, United Kingdom, Ireland, Germany, Italy, Austria, Palestine, Latvia, Lithuania, Estonia, Belgium, Luxembourg, Ukraine, Uzbekistan, Kazakhstan, Mongolia, Moldova, Kyrgyzstan, Azerbaijan, Georgia, Armenia, Albania, Kosovo, Belarus, Cyprus, Denmark, Finland, Malta, Portugal, Romania, Slovenia, Sweden, Israel, Bosnia and Herzegovina, Turkmenistan, Montenegro, Serbia, Tajikistan, Iceland, Liechtenstein, Argentina, Brazil, Chile, Colombia, Peru, Ecuador, Paraguay, Uruguay, Salvador, Bolivia, Canada, Algeria, Mexico, Panama, Costa Rica, Nigeria, Kenya, Mauritius, Tanzania, Cote d'Ivoire, South Africa, Tunisia, Sierra Leone, Zambia, Ghana, Zimbabwe, Uganda, Angola, Ethiopia, Republic of Trinidad and Tobago, Dominica, Guatemala, Senegal, Cameroon, Qatar, Kuwait, Oman, Jordan, Lebanon, Iraq, United Arab Emirates, Saudi Arabia, Bahrain, Egypt, Libya.

Devices and Servers

Heat Map Cameras
Heat-map data record and presentation

Video and Audio

IP Video Input
32-channel
Incoming Bandwidth
256 Mbps
Outgoing Bandwidth
256 Mbps
HDMI 1 Output
4K (3840 × 2160)/60 Hz, 4K (3840 × 2160)/30 Hz, 2K (2560 × 1440)/60 Hz, 1920 × 1080/60 Hz; HDMI 1/VGA simultaneous output
HDMI 2 Output
1920 × 1080/60 Hz; HDMI 2/VGA independent output
VGA Output
1-channel, 1920 × 1080/60 Hz; HDMI 1/VGA simultaneous output
Video Output Mode
HDMI 1/VGA simultaneous output; HDMI 2/VGA independent output
CVBS Output
1-channel BNC (1.0 Vp-p, 75 Ω); PAL: 704 × 576; NTSC: 704 × 480
Audio Output
1-channel RCA (Linear, 1 KΩ)
Two-Way Audio
1-channel RCA (2.0 Vp-p, 1 KΩ)

Decoding and Recording

Decoding Format
H.265+/H.265/H.264+/H.264
Recording Resolution
32 MP / 24 MP / 16 MP / 12 MP / 8 MP / 6 MP / 5 MP / 4 MP / 3 MP / 1080p / UXGA / 720p / VGA / 4CIF / DCIF / 2CIF / CIF / QCIF. Supports up to four 32 MP/24 MP IP video inputs.
Synchronous Playback
16-channel
Live View Window Division
1 / 2 / 4 / 6 / 8 / 9 / 16 / 25 / 32 / 36
Aux Port Window Division
1 / 2 / 4 / 6 / 8 / 9 / 16
Decoding Capability — AI by NVR Enabled
20-ch@1080p (30 fps); 1-ch@32 MP (30 fps); 1-ch@24 MP (30 fps); 2-ch@16 MP (30 fps); 3-ch@12 MP (30 fps); 5-ch@8 MP (30 fps); 6-ch@6 MP (30 fps); 8-ch@5 MP (30 fps); 10-ch@4 MP (30 fps); 20-ch@2 MP (30 fps)
Decoding Capability — AI by NVR Disabled
32-ch@1080p (30 fps); 2-ch@32 MP (30 fps); 2-ch@24 MP (30 fps); 4-ch@16 MP (30 fps); 5-ch@12 MP (30 fps); 8-ch@8 MP (30 fps); 10-ch@6 MP (30 fps); 12-ch@5 MP (30 fps); 16-ch@4 MP (30 fps); 32-ch@2 MP (30 fps)
Dual-Stream Recording
Supported
Stream Type
Video; Video & Audio
Audio Compression
G.711ulaw / G.711alaw / G.722 / G.726 / AAC / MP2L2 / PCM

Recording, Playback and Smart Functions

H.265+ Compression
Effectively reduces storage space by up to 75%
Camera Connection
Full-channel IP camera connection
HD Video Output
Independent HDMI and VGA outputs; HDMI video output up to 4K resolution
Smart Events
Supports multiple VCA events
Smart Search
Smart search for a selected area in recorded video
Smart Playback
Smart playback designed to improve playback efficiency
POS Overlay
POS information overlay on live view and playback
POS Events
POS-triggered recording and alarm
Hik-Connect
Supported for network management

Network

Network Interface
2 × RJ-45 10/100/1000 Mbps self-adaptive Ethernet interfaces
Remote Connection
128
Network Protocols
TCP/IP, DHCP, IPv4, IPv6, DNS, NTP, RTSP, SADP, SMTP, SNMP, NFS, iSCSI, ISUP, UPnP™, HTTP, HTTPS, ONVIF Version 2.2, OTAP
API
ONVIF Profile S/G; SDK; ISAPI
Compatible Browser
IE11, Chrome V57, Firefox V52, Safari V12, Edge V89, or above
Camera Access Protocol
ONVIF Version 2.5, RTSP

Auxiliary Interface and Storage

Serial Interface
2 × RS-485 half-duplex; 1 × RS-232
SATA
4 SATA interfaces
Maximum HDD Capacity
Up to 16 TB per disk
eSATA
1 eSATA interface
Alarm In / Out
16 / 9
USB Interface
Front panel: 2 × USB 2.0; Rear panel: 1 × USB 3.0
Ctrl 12V — Standard Version
Controllable 12 VDC, 0.5 A power output for an external alarm device. Power turns on when the alarm output is triggered. Ctrl 12V is controlled by alarm output 9.
Ctrl 12V — Neutral Version
Controllable 12 VDC, 1 A power output for an external alarm device. Power turns on when the alarm output is triggered. Ctrl 12V is controlled by alarm output 9.
DC 12V
12 VDC, 1 A power output

Physical Interfaces

1
eSATA interface
2
LAN 1 and LAN 2 interfaces
3
Audio input and audio output
4
HDMI 1 and HDMI 2 interfaces
5
VGA and RS-232 interfaces
6
USB 3.0 and VIDEO OUT
7
ALARM IN, ALARM OUT, RS-485, Ctrl 12V, DC 12V
8
GND
9
100 to 240 VAC power supply
10
Power switch

General

GUI Languages
English, Russian, Bulgarian, Hungarian, Greek, German, Italian, Czech, Slovak, French, Polish, Dutch, Portuguese, Spanish, Romanian, Turkish, Japanese, Danish, Swedish, Norwegian, Finnish, Korean, Traditional Chinese, Thai, Estonian, Vietnamese, Croatian, Slovenian, Serbian, Latvian, Lithuanian, Uzbek, Kazakh, Arabic, Ukrainian, Kyrgyz, Brazilian Portuguese, Indonesian, Hebrew
Power Supply
100 to 240 VAC, 50 to 60 Hz
Consumption
≤ 30 W without HDD
Working Temperature
-10 °C to 55 °C (14 °F to 131 °F)
Working Humidity
10% to 90%
Chassis
19-inch rack-mounted 1.5U chassis
Dimensions (W × D × H)
445 × 391 × 75 mm (17.5 × 15.4 × 3.0 in.)
Weight
≤ 3.6 kg without HDD (7.9 lb.)

Certifications

Obtained Certifications
CE, CB, REACH, WEEE, UKCA, LOA
CE Standards
EN 55032:2015, EN 61000-3-2, EN 61000-3-3, EN 50130-4

Accessories Found in the Datasheet

The datasheet contains an "Accessory" section on page 7, but no specific accessory models or accessory names are listed. No accessories have been added here to avoid inventing information not provided by Hikvision.

Ideal Applications & Common Uses

Based on the capabilities documented in the datasheet, this NVR is suited to applications such as:

  • Large multi-camera surveillance systems: Up to 32 IP cameras can be connected to a single recorder.
  • Commercial buildings and offices: Centralized recording with intelligent human and vehicle detection can help operators review activity more efficiently.
  • Retail stores: POS information can be overlaid onto live and recorded video, with support for POS-triggered recording and alarms.
  • Warehouses and industrial properties: Perimeter-protection analytics can be used with human and vehicle classification to monitor restricted areas.
  • Properties requiring advanced video search: AcuSearch can help locate human and vehicle targets across compatible Hikvision AcuSense camera channels.
  • Facial-recognition applications: Supports face capture, face-picture comparison, face search, and libraries containing up to 50,000 face pictures.
  • Parking areas and vehicle monitoring: Compatible ANPR cameras can provide license-plate and vehicle-attribute analytics.
  • Multi-monitor security stations: HDMI, VGA, CVBS, and independent video-output options support different monitoring configurations.
  • High-resolution surveillance installations: Supports recording resolutions up to 32 MP and 4K HDMI display output.
  • Rack-mounted security rooms: The NVR uses a 19-inch rack-mountable chassis for centralized surveillance installations.

Datasheet Notes

The supplied Hikvision datasheet contains several internal specification differences. They are preserved rather than silently corrected:

  • The product title describes the recorder as a "1U" NVR, while the General specification table describes a 19-inch rack-mounted "1.5U" chassis.
  • The Function section states "up to 2 SATA interfaces for HDD connection," while the detailed Auxiliary Interface specification lists 4 SATA interfaces.
  • The Function section states 8-channel synchronous playback at up to 1080p, while the detailed specification table lists 16-channel synchronous playback.
  • The Function section states one self-adaptive 10/100/1000 Mbps Ethernet interface, while the detailed Network specification lists two RJ-45 10/100/1000 Mbps Ethernet interfaces.
  • The Function section also states "8 independent PoE network interfaces." However, the physical-interface diagram does not separately identify eight PoE ports.
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