Protech-audio 685 Manuel d'utilisateur télécharger pdf

Protech Audio Corp., 192 Cedar River Road, Indian Lake, New York 12842 Voice 518-648-6410 Fax 518-648-6395

MODEL COVERED

INTEGRA III SYSTEM

PROTECH

685

The Model 685 features a transformer isolated input,

in order to allow the unit to be connected to circuits w i t ho u t

unbalancing the line. One set of input pins is used for line

level circuits, while another set is used for 25 and 70 volt

distributed audio speaker lines.

The audio is fed from the secondary of the input

transformer to a tuned detector circuit. The detector

circuit is tuned to react to a 25Hz, constant magnitude

tone. When the circuit detects the presence of this tone,

it turns on the on-board relay. If the tone should drop in

level, or completely disappear, the detector circuit turns

off the relay.

The on-board relay contacts are wired, by the installer, to

a remote annunciator panel. This panel usually contains

LED indicators, to alert personnel of a circuit failure. The

relay contacts may be wired to several remote annunciator

panels if necessary. The relay contains an adjustable drop-

out delay, to prevent nuisance tripping.

The Model 517 25Hz Notch Filter may be used in

conjunction with the Model 685, to process program

material, and remove any 25Hz content. For more

information, contact: SALES ENGINEERING

The Model 685 Tone Supervisor Card is designed

for use in professional audio applications, which

require constant, automatic supervision of audio

equipment.

The card detects the presence of a 25Hz signal, even

when program material is present. The 25Hz signal may

be fed into the audio signal path at any point

in the system. There are INTEGRA III SYSTEM

cards available to help facilitate the mixing of the

supervisory tone into the audio system. Feeding the

supervisory tone into the audio system at the earliest

possible point, will allow the supervisor card to

monitor the operation of more equipment.

The Tone Supervisor card is capable of monitoring

audio circuits from 600 ohms to 70 volt distributed

systems. The input of the card is balanced, bridging,

transformer isolated.

Typical applications are multi-zone public address

systems, intercoms, paging systems, training systems,

and monitoring systems. The actural application is

found in buildings such as airports, factories,

courthouses, casinos, convention centers, libraries,

military facilities, racetracks, and corporate boardrooms.

685

TONE SUPERVISOR CARD

INSTALLATION & OPERATION MANUAL

1/06

Model 685 Shown

www.protechaudio.com

1 2

TONE SUPERVISOR CARD 1
PROTECH AUDIO 2

Résumé du contenu

Page 1 - TONE SUPERVISOR CARD

Protech Audio Corp., 192 Cedar River Road, Indian Lake, New York 12842 Voice 518-648-6410 Fax 518-648-6395MODEL COVEREDINTEGRA III SYSTEMPROTE

Page 2 - PROTECH AUDIO

INSTALLATIONThe Model 685 Tone Supervisor Card is designed tobe mounted in the Model 857B Card Frame, or the Model858B Card

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Protech-audio 685 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Audio Protech-audio 685. Protech Audio 685 User Manual Manuel d'utilisatio

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