Product Specification Sheet APS548

Rev. 07/2013

NTR3 - NTR201 - NTR211 Power Supplies

NTR3 / NTR201 / NTR211 Power Supplies

The Alpha Communications® / S.T.R.™ 'NTR' series power supplies are used with a variety of S.T.R.™ (and other) intercom and video-intercom systems, to provide the low voltage power needed to operate the associated system components, and certain optional components and/or accessories. 

All of these power supplies operate on 120VAC primary power. Optional models are available for 220/240VAC primary power as well. 

All models are designed to easily surface mount right onto the finished wall by means of customer supplied screws or the convenient plastic 'Din Rail' bracket supplied with each power supply. 

All models have fused secondaries and meet CE requirements.

  • Easily Installs Right on Finished Wall Surface
  • Provides Safe Low-Voltage Class II Secondary Wiring
  • Fused Secondary Power
  • Convenient Screw Terminal Connections
Models NTR3, NTR201 and NTR211 are all 4.25"W (108mm) x 2.375"H (60mm) x 4.75"D (120mm). All dimensions shown are outside dimensions with protective covers installed.
Gray Color ABS plastic.
Positive Screw Terminal Connectors.

Architects' And Engineers' Specifications

The power supply unit(s) shall be Alpha Communications® /  S.T.R.™ (NTR3, NTR201 or NTR211) or equivalent. Power supply unit(s) shall operate from 120VAC primary power. All secondary wiring to power supply unit(s) shall be low-voltage Class II wiring. All wiring shall be installed as per all federal, state, and local electrical and building codes. Power supply unit(s) 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 unit(s) shall provide the signalling power for proper system operation. For most secure installation, power supply unit(s) should be installed into a lockable equipment cabinet/ housing. Power supply unit(s) shall be installed a safe distance from the intercom and/or video wiring, and as per manufacturer's instructions.

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

Alpha Communications
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.