Product SKU: DHI-VTO6521H
Product Overview
The Dahua DHI-VTO6521H is a 4.3-inch apartment door station designed for multi-residence buildings, gated communities and commercial entrances that need integrated visitor communication and access control. Its touch keypad supports password-based entry, while an integrated IC card reader provides credential access for up to 10,000 cards and a total user capacity of 20,000. A built-in 2MP camera with a wide 113.79° horizontal view, 120dB WDR, infrared illumination and automatic white-light compensation helps capture visitors in changing entrance lighting. Full-duplex audio supports communication through compatible indoor monitors, a management platform and supported app connections. The station can manage up to 200 indoor monitors through its SIP server and provides lock, exit-button, door-status, Wiegand, RS-485 and alarm interfaces. Its IP65-rated housing supports surface or flush installation when correctly sealed.
Key Capabilities
Touch Keypad Access
The touch-button interface supports user, public and duress passwords. This gives residents, staff and authorised visitors an entry option that does not require an IC card, while the duress function provides an additional alarm response within a correctly configured system.
Large User and Card Capacity
Support for up to 20,000 users and 10,000 IC cards makes the DHI-VTO6521H suitable for apartment buildings and multi-tenant properties with a substantial number of residents, employees or authorised service personnel.
Wide-Angle 2MP Entrance Camera
The 2MP camera uses a 2.8mm lens with a 113.79° horizontal field of view. True 120dB WDR, infrared illumination and automatic white-light compensation help maintain visitor visibility across bright entrances and lower-light conditions.
Full-Duplex Communication
An integrated audio input and built-in speaker support natural two-way conversation without requiring each person to wait for the other to finish speaking. Echo cancellation and digital noise reduction help improve communication around busy entrances.
Up to 200 Indoor Monitors
The built-in SIP server can manage as many as 200 compatible indoor monitors. This supports one central entrance station serving a larger apartment building when the network, addressing and monitor configuration are correctly planned.
Integrated Access and Alarm Interfaces
Lock control, Wiegand, RS-485, exit-button, door-status and alarm connections allow the door station to form part of a broader intercom and access-control design rather than functioning only as a visitor call panel.
Best For
- Apartment Buildings: Supports large user and card databases with communication to as many as 200 compatible indoor monitors.
- Strata and Multi-Tenant Properties: Provides card, password and remotely controlled access for residents, staff and authorised visitors.
- Gated Communities: Suitable for shared lobby or entrance points that require visitor calling, door release and management-platform integration.
- Commercial Entrances: Combines a camera, touchscreen keypad, card reader, intercom and lock-control connections in one station.
- Outdoor Lobby Installations: The IP65-rated enclosure and broad operating temperature range suit correctly sealed external or semi-exposed entry points.
Why Choose the DHI-VTO6521H
The DHI-VTO6521H is better suited to apartment and multi-tenant projects than a basic single-residence doorbell because it combines a large credential database, SIP server, touch keypad and extensive access-control interfaces. Residents can use an IC card or password, while authorised operators can release the door remotely through a compatible system. The 2MP wide-angle camera, WDR and automatic illumination help provide a useful visitor view without relying on permanently bright entrance lighting. Support for up to 200 indoor monitors also allows the design to scale across a larger building. Offered through Security Wholesalers, this model is best selected with a confirmed monitor, lock, power, mounting and network plan rather than treated as a universal standalone entry panel.
Buyer Decision Tips
Power and Lock Tip: The station requires a 12V DC, 2A supply, and the power adapter is listed as optional. Confirm the electric-lock type, lock power requirements, exit button and door-status contact before wiring the system.
Weather-Sealing Tip: The IP65 rating requires silicone sealant as described in the installation guidance. Surface preparation, cable-entry sealing and the selected surface or flush mounting arrangement directly affect outdoor protection.
Key Features & Technical Specifications
| Model |
DHI-VTO6521H |
| Product Type |
Apartment IP video intercom door station with touch keypad and IC card reader |
| Display |
4.3-inch IPS display with 800 × 480 resolution |
| Button Type |
Touch buttons with numeric keypad interface |
| User Capacity |
Up to 20,000 users |
| Card Capacity |
Up to 10,000 IC cards with local card enrolment |
| Card Reading Distance |
1–5cm |
| Unlock Methods |
IC card, remote unlock and user, public or duress password |
| Indoor Monitor Capacity |
Built-in SIP server supporting up to 200 compatible indoor monitors |
| Camera |
1/2.7-inch 2MP CMOS camera with low-light capability |
| Lens and Aperture |
2.8mm fixed lens with F2.0 aperture |
| Field of View |
113.79° horizontal, 61.5° vertical and 134.45° diagonal |
| Image Enhancement |
120dB WDR and 3D noise reduction |
| Entrance Illumination |
White and infrared illuminators with automatic white-light compensation |
| Video Compression |
H.264 with a configurable video bit rate from 256Kbps to 2048Kbps |
| Audio |
Full-duplex audio with one input, built-in speaker, G.711u compression, echo cancellation and digital noise reduction |
| Intercom Functions |
Management-platform and supported app calling, auto snapshot, video motion detection and visitor video or text messages |
| Network |
One self-adaptive 10/100Mbps RJ45 interface with SIP, P2P, IPv4, FTP, UPnP, DNS, DDNS, RTSP, RTP, TCP and UDP |
| Access Interfaces |
One RS-485 interface, one Wiegand input, one Wiegand output and one electric-lock connection |
| Alarm and Door Interfaces |
Two alarm inputs, two alarm outputs, one exit-button input, one door-status input and one normally open lock-control output |
| Auxiliary Power Output |
One 12V DC, 100mA output |
| Alarm Functions |
Tamper alarm, duress alarm and door-sensor timeout alarm |
| Power Supply |
12V DC, 2A; power adapter optional |
| Power Consumption |
Up to 5W in standby and up to 18W while operating |
| Protection and Environment |
IP65 with required silicone sealing; operating temperature from −30°C to +60°C at 10%–90% non-condensing humidity |
| Installation |
Surface or flush mounting with optional mounting accessories |
| Construction and Finish |
Silver PC and ABS housing |
| Dimensions and Weight |
389 × 145 × 41.9mm; net weight 1.4kg |
| Certifications |
CE and FCC |
Ideal Use Cases
Apartment Lobbies
Provides visitor calling, resident selection and controlled door release from a shared building entrance.
Strata Entrances
Supports large resident databases and communication with compatible indoor monitors across multiple units.
Gated Communities
Allows residents, management staff and supported app users to identify visitors and release an entrance remotely.
Mixed-Use Buildings
Provides card and password access for residents, employees, contractors and authorised building personnel.
Office Entrances
Combines visitor communication, card access, touch-keypad entry and electric-lock control at one doorway.
Outdoor Entry Points
The IP65-rated enclosure suits correctly sealed external or semi-exposed lobby and gate installations.
Choosing the Right Model
- Choose this model if: The project requires a touch keypad, IC card access, a built-in camera, lock-control interfaces and support for a large number of apartment monitors.
- Choose a simpler villa door station if: The installation serves only one residence and does not require capacity for thousands of users or hundreds of indoor monitors.
- Choose a different access platform if: The project requires biometric recognition or a credential technology other than the confirmed IC card and password methods.
- Confirm the mounting method if: The station will be flush mounted, because mounting accessories and the 12V DC power adapter are listed as optional rather than standard inclusions.
FAQs
- How many users and cards can the Dahua DHI-VTO6521H manage?
The DHI-VTO6521H supports up to 20,000 users and 10,000 IC cards. This capacity suits apartment and multi-tenant entry systems where residents, staff or authorised visitors need individual credentials. Card enrolment can be performed locally, and the listed reading distance is 1–5cm. The final database structure, permission groups and credential process should be planned before commissioning.
- What unlock methods does the DHI-VTO6521H support?
The door station supports IC card, password and remote unlocking. Password options include user passwords, a public password and a duress password. Remote unlocking depends on the connected intercom or management environment. The electric lock, exit button, door-status input and lock-control wiring must be configured correctly, because the door station does not by itself confirm compatibility with every lock or access-control arrangement.
- Does the DHI-VTO6521H provide two-way video intercom communication?
Yes. The DHI-VTO6521H supports full-duplex digital audio using its audio input, built-in speaker, echo suppression and digital noise reduction. Its 2MP camera allows residents or staff to view visitors through a compatible indoor monitor, management platform or supported app connection. Available calling and remote functions depend on the completed SIP, network and intercom configuration.
- How many indoor monitors can the DHI-VTO6521H manage?
The DHI-VTO6521H includes SIP server support and can manage up to 200 indoor monitors. This makes it suitable for apartment buildings and other multi-residence projects that need one entrance station serving many internal units. The practical system size still depends on the network layout, monitor compatibility, addressing plan and installation design, so the full intercom architecture should be confirmed before deployment.
- Is the DHI-VTO6521H suitable for outdoor installation?
Yes. The door station carries an IP65 protection rating and is specified to operate from −30°C to +60°C. The datasheet states that silicone sealant is required to achieve the listed protection, so installation must follow the quick-start guidance. The mounting surface, cable entries, drainage and surrounding exposure should also be considered to maintain reliable outdoor operation.
- What camera and night-viewing features are built into the DHI-VTO6521H?
The DHI-VTO6521H includes a 1/2.7-inch 2MP CMOS camera with a 2.8mm F2.0 lens, 120dB WDR and 3D noise reduction. It provides a 113.79° horizontal field of view and includes white and infrared illumination. Automatic white-light compensation is designed to improve visitor visibility while reducing unnecessary light output around the entrance.
- Which access-control and alarm connections are available?
The door station provides one RS-485 interface, one Wiegand input, one Wiegand output, one electric-lock connection, two alarm inputs, two alarm outputs, one exit-button input, one door-status input and one 12V/100mA power output. It also supports tamper, duress and door-sensor timeout alarms. These interfaces require a properly designed wiring and access-control plan.
- What should be checked before ordering the DHI-VTO6521H?
Confirm the required user and card capacity, compatible indoor monitors, lock type, exit button, door-status contact, alarm connections, 12V DC 2A power supply and surface or flush mounting method before ordering. The power adapter and mounting accessories are listed as optional. Security Wholesalers can help confirm whether the door station suits the planned apartment intercom and access-control layout.
Additional Information
Dahua DHI-VTO6521H Datasheet
