Product Specification Sheet APS643

Rev. 01/2017

NG333 Power Supply Unit (QwikBUS™ Series)

Architects' And Engineers' Specifications

The Power Supply unit(s) shall be Alpha Communications® / S.T.R.™ QwikBUS™ model NG333, or approved equal. The NG333 shall be built into a rugged high impact Grey ABS plastic case, and shall be powered a contractor supplied power cord.

Contractor shall furnish the proper C333-4 connecting cable to connect to the SP333 intelligent controller.

Low voltage wiring shall be used and positive screw terminal and plug-in connectors shall be provided for installation wiring. The NG333 shall be mountable right to the surface of the wall or in a customer supplied junction box cabinet (model# CEC152 or equivalent).

Contractor shall observe all local and national electrical and building codes.
NG333 Switching Power Supply

The Alpha Communications® / S.T.R.™ NG333 Power Supply is used only with the 4-wire QwikBUS™ series intercom and/or video-intercom systems. The NG333 provides the regulated power needed to control the SP333 QwikBUS™ intelligent controller.

Each NG333 gets its power from a customer supplied power cord, and will operate on an input of 120VAC.

Each 4-wire QwikBUS™ system requires a minimum of one NG333 Power Supply.

  • Easily Installs Right on Finished Wall Surface or in Optional Junction Box (model# CEC152 or equivalent)
  • Operates on Safe Low-Voltage Class II Wiring
  • Positive Screw Terminal and Plug-in Connectors

Height: 3.75" (96mm)
Width: 4.25" (108mm)
Depth: 2.375" (61mm) from mounting surface

Construction: High impact Grey ABS plastic case
Connections: Positive screw terminal and plug-in connectors
Mounting: Surface-mounted (usually installed near the System Central Equipment)
Temp. Range: 0°C - 50°C
Alpha Communications
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.