Dahua DHI-VTM416 Lift Controller with 16 Relay Outputs, 128-Floor Access & Fire Alarm Release

Product SKU: DHI-VTM416

Product Overview

The Dahua DHI-VTM416 provides relay-based lift access control for apartment buildings, offices and other multi-level properties that need controlled floor permissions. A single controller includes 16 relay outputs, while cascading up to eight controllers supports permission management across as many as 128 floors. It connects with one Wiegand reader and up to two RS485 readers, and can support up to 60 call lift modules within a correctly designed system. Six alarm inputs and two alarm outputs provide integration points for related building functions, with Alarm Input 1 designated for the fire alarm connection. When that alarm is triggered, permission for all floors is released. TCP/IP connectivity and remote control through a web client support central administration, while 30,000 alarm and log records provide an operational history for review. The compact unit can be mounted directly to a wall or installed using a U-shaped guide rail.

Key Capabilities

Best For

• Apartment Buildings: Controls resident or authorised-user access to assigned floors within a planned lift access system.
• Commercial Offices: Supports floor permission management where staff, tenants or visitors require different levels of access.
• Multi-Tenant Properties: Provides scalable relay control for buildings that need permissions separated by floor or occupancy group.
• Large Multi-Level Projects: Cascading support allows the design to expand from 16 outputs to permission control across as many as 128 floors.
• Integrated Lift Access Systems: Suitable where Wiegand or RS485 readers, alarm interfaces and call lift modules form part of the overall design.

Why Choose the DHI-VTM416

The DHI-VTM416 is designed for projects that need more than basic door access and require floor permissions to be coordinated with a lift system. Its 16 relay outputs make it suitable for smaller installations using one controller, while eight-controller cascading gives system designers room to scale the same platform to as many as 128 floors. Support for Wiegand and RS485 readers, call lift modules, six alarm inputs, two alarm outputs and TCP/IP management reduces the need to combine unrelated control devices. The designated fire alarm input is also important because it releases permission for every floor when triggered. Offered through Security Wholesalers, the VTM416 is best selected as part of a properly documented lift-access design with confirmed readers, relay assignments, power and alarm connections.

Buyer Decision Tips

Key Features & Technical Specifications

Model	DHI-VTM416
Product Type	Lift access controller
Floor Permission Capacity	Supports up to 128 floors using eight cascaded controllers
Relay Outputs	16 relay outputs per controller
Reader Support	Up to 1 Wiegand reader and 2 RS485 readers
Call Lift Modules	Supports up to 60 call lift modules
Alarm Inputs	6 inputs, with Alarm Input 1 designated for the fire alarm
Alarm Outputs	2 outputs
Fire Alarm Function	Releases permission for all floors when the fire alarm is triggered
Record Capacity	30,000 alarm and log records
Remote Management	Remote control through a web client
Communication	TCP/IP, RS485 and Wiegand
RS485 Interfaces	4 interfaces for readers, call lift modules and controller cascading
Main Processor	ARM Cortex M4 at 180MHz
Indicators	1 power indicator, 1 communication indicator and 16 relay indicators
Power	12V DC, 2A
Installation	Direct wall fixing or U-shaped guide rail mounting
Operating Temperature	−20°C to +55°C
Relative Humidity	10% to 90% RH
Dimensions and Weight	210 × 116 × 29mm; 1.0kg

Ideal Use Cases

Choosing the Right Model

• Choose this model if: The project requires 16 relay outputs, Wiegand or RS485 reader connections, web-client control and the ability to cascade controllers for larger floor counts.
• Choose a different solution if: The lift system, readers or management platform cannot be confirmed as suitable for the VTM416’s TCP/IP, RS485, Wiegand and relay-based interface requirements.

FAQs

1. How many floors can the Dahua DHI-VTM416 control?
   The DHI-VTM416 provides 16 relay outputs on one controller and supports cascading up to eight controllers for permission control across as many as 128 floors. The final floor count depends on the completed lift-control design and how the relays are assigned. For smaller buildings, one controller may cover up to 16 controlled outputs, while larger projects can expand through the supported cascade arrangement.
2. Which card readers can connect to the DHI-VTM416?
   The DHI-VTM416 supports connection to one Wiegand reader and up to two RS485 readers. Its four RS485 interfaces have defined roles: the first two can connect a card reader or call lift module, the third is used for cascading a slave lift controller, and the fourth supports a call lift module. Reader selection and system programming should be confirmed as part of the complete access-control design.
3. What happens when the fire alarm input is triggered?
   The controller provides six alarm inputs, with Alarm Input 1 designated for the fire alarm connection. When the fire alarm is triggered, the DHI-VTM416 releases permission for all floors. This function is intended to remove normal floor-access restrictions during the alarm condition, but the complete fire and lift interface must still be designed, connected and commissioned according to the building’s required safety procedures.
4. How many relay and alarm outputs does the VTM416 provide?
   The VTM416 includes 16 relay outputs for lift permission control and two alarm outputs. It also has 16 relay indicators, allowing installers or service technicians to identify relay activity at the controller. The number of controlled floors or functions depends on how those relay outputs are assigned within the lift system, so the relay schedule should be planned before wiring and configuration begin.
5. Can the DHI-VTM416 store access and alarm records?
   Yes. The DHI-VTM416 supports a combined capacity of 30,000 alarm records and log records. This provides a local record base for operational review and system management. The usefulness of those records depends on the completed configuration and connected management environment, so retention expectations, review procedures and any wider reporting requirements should be confirmed during system design.
6. Can the VTM416 be managed remotely?
   Yes. The VTM416 supports remote control through a web client and communicates using TCP/IP, RS485 and Wiegand. Web-based management can simplify configuration and ongoing administration when the controller is connected to the required network environment. Network addressing, permissions and security should be planned by the installer or system administrator rather than leaving the device on an unconfigured network.
7. How can the DHI-VTM416 be mounted?
   The controller supports two mounting approaches. It can be fixed directly to a wall with screws, or installed using a U-shaped guide rail and then hung in position. The unit measures 210 × 116 × 29mm and weighs 1.0kg, so the mounting location should provide suitable access for wiring, ventilation, inspection and future servicing.
8. What should be checked before ordering the DHI-VTM416?
   Confirm the number of controlled floors, required reader type, call lift modules, alarm connections, cascade requirements and the available 12V DC power supply before purchase. The DHI-VTM416 requires 12V DC at 2A and supports up to 60 call lift modules. When supplied by Security Wholesalers, the controller should form part of a properly planned lift-access system rather than being selected as a standalone replacement without compatibility checks.

Additional Information

Dahua DHI-VTM416_Datasheet