The Protech Audio Model 589 is a high quality
audio controlled switch coupled with a profes-
sional quality preamplifier. The unit is designed
for applications requiring switch closures to
follow the presence of an audio signal.
Typical applications are public address
systems, broadcast studios, sales presentation
rooms, headphone listening systems, multi-
room audio systems, and recording systems.
The actual application of the amplifiers is
found in buildings such as airports, factories,
courthouses, casinos, convention centers,
libraries, hotels, racetracks, training systems, cor-
porate boardrooms, etc.,.
The unit is capable of functioning in a wide
variety of installations. A typical application
would be the turning on of bypass relays in
paging systems during priority announcement.
Multiple units may be used to design a multi-
level priority system. The switch-selectable re-
mote threshold capability allows this unit to
serve well in systems requiring different thresh-
old levels at different times of the day.
The built-in preamplifier, is switch selectable to
serve as either a microphone preamplifier, or a
line amlifier.
MODELS COVERED
The built-in preamplifier is a very cost effective
feature, eliminating the need for separate micro-
phone or line level preamplifiers.
The Model 589 features two different types of
closures, CMOS and Relay. The relay closures are
configured in two Form C contact arrangements.
The CMOS closures are arranged in two Form A
contacts. The relay closures are capable of switch-
ing high current loads. The CMOS is recom-
mended for lower level audio (microphone level)
switching, since they introduce no switching
noise. Both sets of contacts have an adjustable
threshold, to determine when they activate, as
well as an adjustable drop-out delay, to
determine how quickly the switch opens, after
the incoming audio stops.
The Model 589 is designed to mount in the Model
857B or 858B Card Frame. The unit may be mixed
or matched with other INTEGRA III SYSTEM cards
to create a complete audio system.
The Model 589 Audio Controlled Switch may be
expected to provide years of uninterrupted, quality
service. For additional information, or design as-
sistance contact:
APPLICATIONS ASSISTANCE
AUDIO CONTROLLED SWITCH
INSTALLATION & OPERATION MANUAL
589
INTEGRA III SYSTEM
PROTECH
®
1/02
www.
protechaudio
.com
Model 589 Shown
Protech Audio Corporation, PO Box 597, 192 Cedar River Road, Indian Lake, New York, 12842, Voice 518-648-6410 Fax 518-648-6395
