Product Specification Sheet APS402

Rev. 07/2013

6681 System Amplifier/Power Supply (5651 Series)

This Specsheet is for a product which is discontinued. Please contact us for alternative products.
Architects' And Engineers' Specifications

The power supply/amplifier shall be Alpha Communications® / Elvox™ model 6681, or approved equal. Amplifier shall operate from a standard 120VAC power source. All other wiring to power supply/amplifier shall be lowvoltage Class II wiring, installed as per all federal, state, and local electrical codes. Power supply/amplifier shall surface mount right to the finished wall and shall be installed in a suitable environment that is free from excessive dirt, dust, temperature, humidity, grease and water. Power supply/amplifier shall provide the intercom amplification and signaling power for proper system operation. For most secure installation, power supply should be installed into a lockable equipment cabinet/housing. The 6681 is designed to be used with the 5651W or 5651B series (flush mount) open voice apartment video-intercom monitor units.

Power supply/amplifier shall be installed a safe distance from any source of electrical interference.

Contractor shall observe all local and national electrical codes.

6681 Amplifier/Power Supply
The Alpha Communications® 6681 amplifier/power supplies are used with the 5651W or 5651B series video-intercom monitors, to provide intercom amplification, power to operate the electric door opener(s) etc., and power to operate the video monitor units, for a single building entrance.

The 6681 units each require a standard 120VAC power source. 

These 6681 amplifier/power supplies are designed to easily surface mount right onto the finished wall by means of customer supplied screws. Connections are positive screw terminal type.

Only one (1) 6681 is required for each system, regardless of the number of monitors (1 per apt.).

  • Easily Installs Right on Finished Wall Surface or in Customer Supplied Housing
  • Only one power supply required per system.
  • Clear Voice Fidelity with Adjustable Voice Volume Control
  • Convenient Positive Screw Terminal Connections
  • Operates on standard 120VAC primary power
Dimensions: Height: 5.25" (134mm) Width: 8.25" (210mm) Depth: 3.00" (77mm) from mounting surface
Volume Control: Adjustable potentiometer built-in.
Connections: Positive Screw Terminal Connectors
Wiring Requirements
Basic video-intercom riser wiring shall be 4-common #22AWG, 2-common #18AWG, 1-RG59/U (all copper minimum 95% braid) coaxial cable common and 1 selective wire #22AWG, for each video monitor station connected to the riser cable. Add one (or more) additional common wires if other monitor functions will be used. See system wiring diagram(s) for more complete wiring information.
Optional Components
  • DO-001 16VAC Door Release-Mortise Type
  • 5592/001 Dual Entrance Dual Video Adaptor (requires 2/690 connector cable)
  • PK407A Specialty Door Opener Relay Adaptor (1 per entrance)
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.