Data Sheet

Product Specification Sheet APS548 - Rev. 07/2013
NTR3 - NTR201 - NTR211 Power Supplies
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: [phone] • Fax: [phone]
TOLL-FREE: [phone] • Web: AlphaCommunications.com • Email: [e-mail]
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.
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NTR3
NTR201
NTR211
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.
Features
Easily Installs Right on Finished Wall Surface
Provides Safe Low-Voltage Class II Secondary Wiring
Fused Secondary Power
Convenient Screw Terminal Connections
Specifications
Dimensions:
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.
Housing: Gray Color ABS plastic.
Connections: 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.