Valcom v-9932 Service Manual

V-9932

NOISE SENSING VOLUME CONTROL

GENERAL

The V-9932 is designed to electronically adjust the
level of a page by monitoring ambient noise levels in
an area of a building.

These instructions contain the specifications and
information necessary to install, operate, and maintain
the V-9932 Noise Sensing Volume Control.

SPECIFICATIONS

Purpose

The V-9932 provides automatic paging level
adjustments in areas where ambient noise levels are
continuously changing.

VSP-V-9932

Issue 9

Application

• Valcom one-way paging systems

Features

• Solid-state design

• Low power requirements

• Operates on key system voltages

• Self-contained se nsing device

Capacity

Each V-9932 will control up to 150 Valcom one-way
amplified speaker assemblies in a single zone.
Multiple V-9932 units can be used within the same
zone.

Additional Materials Required

At the time of installation, the installer should provide
the following materials:

• 24VDC power supply (if existing supply is

inadequate)

• "D" type station wire

Dimensions/Weight

The V-9932 is designed to be wall mounted.

• 7.3"H x 4.7”W x 2.1"D

(18.54cm H x 11.94cm W x 5.33cm D)

• 0.9 lbs. (.41kg)

Power Requirements

The V-9932 requires -24VDC Signal Battery.
Range -20 to -28VDC "B" Battery
Idle 50 mA
Operating 100 mA

Nominal Specifications

Automatic Level Adjustment Range -10dB to 30dB
Quench Threshold -23dBm nominal
Power Output -10dBm
Frequency Response 80-10KHz +3dB
Input Impedance 600 ohms
Output Impedance 8 ohms
Operating Temperature 0 to 50 degrees C
Power Requirements -24VDC signal battery
Monitor Reset 5 sec.

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To
Telephone
System

T

Valcom
Page

R

Control
Unit

Zone A

T

IN

R

V-9932

-24V GND

Power
Supply

T

OUT

R

Maximum 150 Amplified
One-Way Speaker Assemblies

Figure 1 - Simplified Block Diagram of Connections

INSTALLATION

These instructions cover only the installation
procedure of the Valcom V-9932. Please consult
applicable instructions for control equipment or any
other equip ment used.

Precautions

All precautions have been taken at the factory to
insure that the equipment functions properly. Please
observe the following precautions or the equipment
may be damaged and the warranty voided.
a. Unplug the power supply before connecting any

wires or cables to the control unit connecting
block. With power on, accidental bridging of
two terminals with a wiring tool may damage
electronic circuits.

b. Do not use a lamp tester to check signals. Use a

voltmeter. A lamp tester, when first applied is a
short circuit to electronic circuits.

c. Do not ap ply power to the control unit until all

connections have been double-checked.

NOTE: The V-9932 cannot be used to control
music.

Mounting

a. Locate a space on the wall central to the noise

producing equipment.

b. Carefully unpack the unit from the carton and

inspect.

c. Unsnap cover from base and mount base to wall

using pan head screws.

b. Connect the input of amplified speaker to T and

R output of V-9932.

c. Connect power supply -24VDC and ground to

-24 and GND terminals on V-9932.

Set-Up and Adjustment

a. Complete all connections to page control unit,

V-9932, one-way amplified speakers, and power
supply (refer to applicable instructions).

b. With background noise at its lowest level, access

page system and adjust level controls on page
control and speakers for proper sound level.

c. Turn on all noise producing equipment for

maximum background noise l evel.

d. Access page and test.

NOTE: The V-9932 microphone gain is factory
adjusted. This adjustment is correct for most
applications.

e. I f page volume with maximum background i s t oo

high, turn microphone gain control counter
clockwise in small increments and test.

Important: Wait at least 10 seconds after
adjusting microphone gain before accessing
page and testing.

f. If page volume with maximum background noise

is too low, turn microphone gain control
clockwise in small increments and test.

Important: Wait at least 10 seconds after
adjusting microphone gain before accessing
page and testing. Do not adjust microphone
gain beyond the point where the LED lights.

g. Installation and set-up now complete.

Connections

Refer to Figure 2 while performing the following:
a. Connect the page control unit speaker output to T

and R input of V-9932.

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