The VTNS2003B-2 is a switch for the new generation of Dahua Video Intercom products. This generation of video intercom products communicates using the SIP protocol. This protocol ensures a reliable voice-to-listen connection and offers third-party integration options. The 2-wire technology simplifies installation and allows multiple op-stations to be connected to a single cable.
Pros:
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Multiple devices on a single 2-wire connection: This generation allows you to connect multiple products in series via the "out" port. Switches can also be connected to each other via 2 wires. However, each switch must be supplied with a separate 48VDC power supply.
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2-wire system: Both the power for the indoor and outdoor stations and the data transmission are carried by the same cable. The stations can be connected in a single line, meaning that only 2 wires are needed for a functional system.
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TCP-IP network protocol: Despite the 2-wire technology, the stations function as regular network products. This means that each station must have its own unique IP address. A major advantage of this is that stations connected to this 2-wire switch can be combined with PoE products and 2-wire products from the previous generation.
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Suitable for DMSS and DSS Pro: Because the 2-wire products are simply part of the network, they can also be used with the DMSS app or DSS Pro management software
Points of attention:
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Not suitable for all 2-wire products: This switch is not compatible with all Dahua 2-wire intercom products. Older generation products are not supported by this switch.
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Maximum 2 outdoor stations per switch: A maximum of 2 VTO outdoor stations can be connected per switch. If more outdoor stations are added, they must be connected to a subsequent switch. The switches can be interconnected.
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Maximum 2 extensions per VTH indoor station: A maximum of 2 extensions can be added to a VTH indoor station. If more than this are needed, it is recommended to connect the VTHs via a PoE switch.
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VTNS2003-B
- For 6 devices or less, a 48VDC power supply of 1.25A is sufficient
- For 6 to 22 devices, a 48VDC power supply of 5A is recommended.
Advice
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Recommended wiring:
- 4x0.5mm² with a maximum resistance of 4Ω per 100 meters. Maximum distance 50 meters
- 2x0.5mm² with a maximum resistance of 3.9Ω or less per 100 meters. Maximum distance 50 meters.
- UTP Cat5e 0.45mm with a maximum resistance of 12Ω per 100 meters. The maximum distance with 6 VTH is then 50 meters, and with 12 VTH this is 30 meters.
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Lock control via external power supply: Theoretically, power and control of locks and doors could also be provided by the switch. However, this can negatively impact the operation and communication between the internal and external units and is therefore not recommended.
