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Extron electronic Priority Page Controller PPC 25 User Manual

Ppc 25 installation instructions

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1

PPC 25 Priority Page Sensor • Installation Instructions

68-1437-01

Rev F

04 08

PPC 25 Installation Instructions

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Ceiling Mounted
Paging Speaker

Paging System

PPC 25
Priority
Page
Sensor

Classroom

Admin Building

To Classroom
Paging Speakers

Relay Output

Remote
Vol/Mute
Control

Extron
PPC 25
Priority Page
Controller

Extron
PVS 204SA

Twisted Pair
Switcher

Extron
SI 26

Surface Mount
Speakers

PPC 25 Overview
The PPC 25 consists of the Priority Page

Controller and Priority Page Sensor.

Together they mute classroom audio for

the duration of an announcement that is

made over a Public Address (PA) system.
The Sensor connects to a PA speaker

lead and detects current flow when a

PA announcement is initiated.
The Sensor signal triggers the PPC 25

controller’s output relay to close. This

relay closure can connect to a PoleVault

switcher, a Mini Power Amplifier (MPA),

a MediaLink

Controller (MLC), or any

device with a contact closure type of

mute control or a configurable digital

input.
The output relay remains closed until the PA

announcement ends. It then opens, dropping

the mute signal and restoring the classroom audio.
For a PoleVault System, the output relay should connect only to the PVS 204SA and not the MLC. This requires no

software configuration.
If the Output Relay is connected to an MLC digital input, use Global Configurator software to configure the input

port, and set the monitoring conditions and actions to drive the desired mute function on the classroom audio device.
The PPC 25 Controller and Sensor are rated for use in plenum environments (any area utilized for air handling,

including areas above suspended ceilings and below raised floors). The PPC 25 Sensor assembly must be installed

in a UL-compliant junction box with a cover to meet the plenum rating requirement.

The PPC 25 works with traditional 25V or 70V and 4/8 ohm PA systems. It was not designed

for, and may not work properly with, systems using digital clocks and two-way intercoms.

Front and Rear Views of the PPC 25 Controller

a

Power-on LED

green when power is on

b

RELAY LED

— amber when output relay is closed

c

POWER receptacle

— 12 VDC, 33 mA. The unit does not ship

with a power supply. Power may be shared with another device.

Polarity must be observed.

d

PAGING SENSOR connector — for the Priority Page Sensor that

is located near a PA system speaker

e

RELAY OUT connector

— connects to an amplifier or switcher

that has a contact closure type of mute control input, or to an MLC

device with a digital input. When a PA system announcement is

initiated, the output relay closes and remains closed for the duration of the announcement. The closed output

relay triggers the classroom audio mute function. When integrating the PPC 25 into a PoleVault System,

connect the output relay to the PVS 204SA Mute and Ground pins only (see diagram on page 2).

f

TIME switch

— sets how long the output relay will remain closed after a PA announcement has ended. A

short time delay is necessary so that if the PA system announcer pauses briefly during the announcement, the

classroom audio is not restored prematurely. The 2-position DIP switch provides the following time settings:

g

SENSITIVITY adjustment

— sets the sensitivity level for the signal arriving from the Priority

Page Sensor. The final setting depends on the type of paging system and the number of wire

loops on the Sensor (see page 2). Rotate clockwise to increase sensitivity and counterclockwise

to decrease sensitivity.

PPC 25

RELAY

7

2

3

4

5

6

1

POWER

C NO

PAGING

SENSOR

OUT

TIME

RELAY

SENSITIVITY

12V

0.5A MAX

ON

1 2

A Typical PPC 25 Installation

TIME

ON

1 2

= 2.0 sec (default)

= 4.0 sec

= 6.0 sec

= 8.0 sec