Rev. 1 - 01/98
Copyright© 1997-2000, 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
Due to continuous product improvement, all colors, sizes, materials,
finishes and specifications are subject to change without notice.
TU5/S Dual Entrance
Audio Switching Adaptor
The Alpha Communications®/S.T.R.™ TU5/S dual en-
trance audio adaptors are used with our S.T.R.™ series
TV32/S intercom amplifiers only. They provide audio
intercom and door release switching for two (2) entrances
The TU5/S adaptors are used in addition to the system
amplifier, and power off of the same transformer. No
additional transformer is needed.
You must use one (1) TU5/S switching adaptor for two (2)
The TU5/S multi-entrance adaptors 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. Connec-
tions are positive screw terminal type.
• Can be used for two (2) entrances
• Operates on Safe Low-Voltage Class II Wiring
• Convenient Plastic 'Din Rail' Mounting Bracket
• Positive Screw Terminal Connectors
2.375" (61mm) from mounting
Rugged ABS plastic casing.
Positive Screw Terminal Connectors.
ARCHITECTS' AND ENGINEERS'
The multi-entrance audio adaptor(s) shall be Al-
pha Communications®/S.T.R.™ model TU5/S,
or approved equal. Unit(s) shall provide the con-
trol and power circuits needed to switch the audio
and door release functions, to one (1) of two (2)
calling entrance stations. Unit(s) shall be used in
addition to standard TV32/S system amplifier.
Low voltage wiring shall be used and positive
screw terminals shall