Product Specification Sheet APS345

Rev. 08/2013

VDU-4 Video Distributor Unit (VMH25A and VH30 Series)

Architects' And Engineers' Specifications
The video distributor unit(s) shall be Alpha Communications® / S.T.R.™ model VDU-4, or approved equal, and shall provide up to four (4) amplified video outputs for the video-intercom system. The VDU-4 shall be built into a rugged high impact ABS plastic case, and shall be powered by the camera's DC power supply.

Low voltage wiring shall be used and positive screw terminal and coax clamp video connectors shall be provided for installation wiring. The VDU-4 shall be mountable right to the surface of the wall or in a customer-supplied junction box cabinet.

Contractor shall observe all local and national electrical and building codes.

VDU-4 Video Distributor Unit
The Alpha Communications®/S.T.R.™ VDU-4 video distributor unit is used only with the VMH24, VMH25 and VH30 series coaxial type video-intercom systems. The VDU-4 is used when the video signal from the lobby entry camera(s) must be split (distributed) to several coaxial cables.

The VDU-4 gets its power from the system camera DC power supply. All VDU-4 connections are positive screw terminal and coax clamp connector type.

Each VDU-4 has four (4) video outputs. When multiple VDU-4's are used, for systems requiring more than four (4) outputs, multiple VDU-4 units may be "daisy-chained" to provide outputs in multiples of four (4).

  • Easily Installs Right on Finished Wall Surface or in Optional Junction Box
  • Operates on Safe Low-Voltage Class II Wiring
  • Positive Screw Terminal and Coax Clamp Connectors
  • Provides 4 separate amplified video outputs
  • Can be "daisy-chained" when more than 4 video outputs are needed
Height: 3.75" (96mm)
Width: 4.25" (108mm)
Depth: 2.375" (61mm) from mounting surface
High impact Black ABS plastic case
Positive screw terminal and coax clamp video connectors
Temp. Range:
0-50 degrees C.
Surface-mounted (usually installed near the system power supply and other system central equipment)
Alpha Communications
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.