The Alpha Communications®/S.T.R.™ SP333
intelligent controller is used only with the Qwik-
BUS™ series intercom and/or video-intercom sys-
tems. The SP333 provides the intelligent 'BUS'
circuitry needed to control the QwikBUS™ system
Each SP333 gets its power from the SNT333
power supply. All SP333 field connections are
positive screw terminal type, or plug-in type.
Each QwikBUS™ system requires a minimum of
one SP333 intelligent controller.
• 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 system amplifier/power supply and
other system central equipment).
Rev. 1 - 03/07
ARCHITECTS' AND ENGINEERS'
The intelligent controller(s) shall be Alpha Commu-
nications®/S.T.R.™ QwikBUS™ model SP333, or
approved equal. The SP333 shall be built into a
rugged high impact ABS plastic case, and shall be
powered by the model SNT333 power supply. Con-
tractor shall furnish the proper number of SP333
units, depending upon system capacity.
Low voltage wiring shall be used and positive screw
terminal and plug-in connectors shall be provided for
installation wiring. The SP333 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.
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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: info@alphacommuni