The Alpha Communications®/S.T.R.™ NG333
Power Supply is used only with the 4-wire Qwik-
BUS™ series intercom and/or video-intercom sys-
tems. The NG333 provides the regulated power
needed to control the SP333 QwikBUS™ intelli-
Each NG333 gets its power from a customer
supplied power cord, and will operate on an input
Each 4-wire QwikBUS™ system requires a mini-
mum of one NG333 Power Supply.
• Easily Installs Right on Finished Wall Surface or in
Optional Junction Box
• Operates on Safe Low-Voltage Class II Wiring
• Positive Screw Terminal and Plug-in Connectors
Height: 3.75" (96mm)
Width: 4.25" (108mm)
2.375" (61mm) from mounting
Construction: High impact Grey ABS plastic case
Positive screw terminal and plug-in
0-50 degrees C.
Surface-mounted (usually installed near
the SP333 intelligent controller and
other system central equipment).
Rev. 1 - 05/07
ARCHITECTS' AND ENGINEERS'
The Power Supply unit(s) shall be Alpha Communi-
cations®/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 connect-
ing cable to connect to the SP333 intelligent control-
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.
Contractor shall observe all local and national elec-
trical and building codes.
Copyright© 2007, Alpha Communications®, All Rights Reserved
42 Central Drive • Farmingdale NY 11735-1202 • Phone (631) 777-5500 • Fax (631) 777-5599
TOLL-FREE 1-800-666-4800 • Web: www.AlphaCommunications.com • Email: email@example.com