Product SKU: DHI-VTNS2003B-2-A
Product Overview
The Dahua DHI-VTNS2003B-2-A is a 2-wire interface switch designed to support and expand Dahua 2-wire video intercom systems. Acting as a central communication hub, it enables seamless connection between indoor monitors, door stations and network infrastructure. With support for both 2-wire and Ethernet connectivity, this device simplifies system design and is ideal for both new installations and retrofit projects using existing cabling.
Why Choose the DHI-VTNS2003B-2-A
The DHI-VTNS2003B-2-A is essential for building scalable and reliable 2-wire intercom systems. Its ability to connect multiple indoor monitors and door stations while supporting cascade expansion allows for flexible system growth. Designed for efficiency and stability, it ensures smooth communication across all connected devices, making it a key component for residential, apartment and commercial intercom deployments.
Key Capabilities
2-Wire System Hub
Acts as the central interface for connecting door stations and indoor monitors within a 2-wire intercom system.
Supports Multiple Devices
Connects up to 20 indoor monitors and 2 door stations, enabling scalable system design.
10-Level Cascade Expansion
Supports cascading across multiple switches to extend system size and coverage for larger installations.
Hybrid Connectivity
Includes both 2-wire ports and RJ45 Ethernet ports for flexible integration with IP networks.
DIN Rail Mounting
Designed for convenient installation in electrical cabinets, ensuring a clean and organised setup.
Key Features
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2-Wire Interface Switch: Enables communication between intercom devices over existing 2-wire infrastructure.
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Supports 20 Indoor Monitors + 2 Door Stations: Provides capacity for medium to large intercom systems.
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10-Level Cascade Support: Allows expansion of the system by linking multiple switches together.
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Dual RJ45 Ethernet Ports: Supports 10/100 Mbps network connectivity for integration with IP systems.
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Status Indicator LEDs: Provides visual feedback for power and communication status.
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Guide Rail Mounting: Designed for DIN rail installation in control cabinets.
Specifications Summary
- Communication Mode: 2-wire + Ethernet
- Device Capacity: Up to 20 indoor monitors, 2 door stations
- Cascade Levels: Up to 10
- Ports: 2 × 2-wire cascade ports, 2 × RJ45 Ethernet ports
- Power Supply: DC 48V
- Power Consumption: ≤ 15W
- Installation: DIN rail mount
- Operating Temperature: -10°C to +55°C
- Dimensions: Approx. 131 × 103 × 40 mm
- Material: PC + ABS housing
Understanding 2-Wire Interface Switches
A 2-wire interface switch acts as the backbone of a 2-wire intercom system, allowing multiple devices to communicate over simplified cabling. It converts and distributes signals between door stations, indoor monitors and network connections, making it possible to build scalable systems without complex wiring. The DHI-VTNS2003B-2-A is especially useful for upgrading existing installations where running new cables is not practical.
Ideal Use Cases
- Apartment Buildings – Manage multiple indoor monitors and door stations with centralised communication.
- Retrofit Projects – Upgrade legacy intercom systems using existing 2-wire cabling.
- Residential Complexes – Expand intercom systems with scalable architecture.
- Commercial Sites – Integrate intercom systems into network infrastructure for centralised control.
FAQs
- What does this switch do?
It acts as a central hub for 2-wire intercom systems, allowing multiple indoor monitors and door stations to communicate and connect to a network.
- How many devices can it support?
It can support up to 20 indoor monitors and 2 door stations, with additional expansion through cascading.
- Can it be used in large systems?
Yes. With 10-level cascade support, it can be used to build large-scale intercom systems across multiple buildings or floors.
Additional Information
VTNS2003B-2-A_datasheet_20210726
