Valcom v-9945a Service Manual

VSP-V-9945A

Issue 7

V-9945A

SINGLE TONE/INTERRUPTED

WARBLE TONE LOUD HORN

INTRODUCTION

The V -9945A is a horn with built-in tone generator
and amplifier used for loud signaling applications.
These instructions provide identification, connection,
installation, operation and maintenance information
for the V -9945A, Single Tone/Interrupted Warble
Tone Horn Ringer.

SPECIFICATIONS

Purpose

The V -9945A provides amplified electronic tones for
signaling in large or noisy areas or outside.

Applications

• Night ringing

• C. O. audi ble ringing

• Time clocks

• Special purpose signaling

Features

• Self-contained tone generator, amplifier, volume

control and horn speaker

• Single tone or warble tone outputs

• Power supply included

• Activated by dry contact closure

• Single tone will override warble tone

• Warble tone interrupted 1 second on, 5 seconds

off

• Single tone continuous for duration of closure

• Weatherproof

• Units may be multipled for simultaneous access

Capacity

The V -9945A has provisions for two inputs, either or
both of which can be used in an application. If both
inputs are activated simultaneously, the single tone
will override the warble tone.

The V -9945A is a stand alone ringer horn activated by

a relay. If more than one ringer horn is required,
contact Valcom Technical Support at [phone]
for design assistance.

Dimensions/Weight

• 6.50"H x 8.20"W x 10.40"D, plus mounting

(16.51cm H x 20.83cm W x 26.42cm D)

• 4.3 lbs. (1.95 kg)

Power Requirements

-21.5 to -26.0VDC "B" battery, 250mA nominal.

Environment

• Temperature: -20 to +55 degrees C

• Humidity: 0 to 95% non-precipitating

DESIGN

Access Requirements

The V -9945A requires a dry contact closure for
activation of each tone (If both tones will be used,
two closures are required). The closures may be in
the form of night ringing relay contacts, time clock
contacts, a standard normally open switch or
equivalent.

bracket

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Equipment Requirements

A system using the V -9945A will consist of the
following:

• Access equipment (See Design Section)

• -24VDC power supply (Included with horn)

INSTALLATION

General

These instructions cover only the installation
procedure for the Valcom V -9945A. Please consult
practices for other equipment if any other equipment
is being used.

TELEPHONE SYSTEM

NIGHT RING

CONTACT
CLOSURE

TIME CLOCK

CONTACT
CLOSURE

RED
GREEN
BROWN
WHITE
BLACK

-24VDC

POWER SUPPLY

V-9945A

• A "C" clamp is provided with the ringer to

• Connection to an electrical backbox is

The V -9945A may be rotated or moved up and down
to obtain the desired position by loosening the knob
(See Figures 2 and 3) at the bottom of the unit
approximately 1 turn. Make required adjustment and
re-tighten knob.

Lead Designations

Black Ground (+)

provided. Knockout holes are provided for
punch out should additional holes be
desired.

allow mounting to a beam. Place the bolt
through the hole in the bottom of the base to
secure the "C" clamp to the beam. (See
Figure 2).

accomplished by channeling wire through
the ball of the base (See Figure 3) and
making appropriate connections. The base
has holes punched for a double-gang square
box, but by punching out additional
knockout holes, the base can be mounted to
a single-gang or octagon box.

White -24VDC

FIGURE 1 - TYPICAL INSTALLATION

Precautions

All precautions have been taken at the factory to
insure that the equipment functions properly. To
insure proper operation and to prevent equipment
damage, please observe the following:

• Unplug the power supply before making any

connections to the unit.

• Do not apply power to the uni t until all

connections have been double-checked.

Attaching Speaker to Base

NOTE: For ease of installation, the base can be
attached to the speaker before or after the base is
mounted.

• Loosen position adjustment knob.

• Insert the ball of the base into the socket of

the speaker.

• Tighten the position adjustment knob.

Mounting

The V -9945A should be mounted 12 feet to 25 feet
high in the area requiring signaling. The unit can be

Connections

Connections should be accomplished using twisted
pair telephone wire. The power supply should be
located within 500 feet of the horn.

• Connect negative (-)(-24VDC) lead of the

• For warble tone access, connect contact

• For single tone access, connect contact

Connections for both single tone and warble tones
may be made to the same speaker.

Red Warble tone access
Green Common
Brown Single tone access

power supply to the white lead; connect
positive (+)(Gnd) lead of the power supply to
the black lead.

closure between red and green.

closure between brown and green.

mounted to a wall, a beam or an electrical box.

• Mount the base to a wall using the two holes
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OPERATION

General

The V -9945A is a horn speaker containing circuitry to
generate single and dual electronic tones, as well as a
5 Watt amplifier and volume control. It also contains
a timer to interrupt the warble tone signal (1 second
on, 5 seconds off). When the red and green leads are
connected together (Through a contact closure), the
warble tone and interrupter circuits are activated.
When the brown and green leads are connected, the
circuitry for the single tone is activated. If both
closures are applied, the single tone will be sent.

TECHNICAL ASSISTANCE

When trouble is reported, verify that power is being
supplied to the unit and there are no broken
connections. Check voltages for proper polarity on
the crossconnect block.

A lineman's test set, several clip leads and a VOM
may be necessary to effectively troubleshoot the unit.

Table 1 identifies symptoms of some possible
problems with solutions. If your problem is listed,
perform the actions indicated.

Table 1 - Troubleshooting Chart

1. No output. A. Verify -24 Volts on white lead and ground (+)

If the trouble has not been located, continue to
troubleshoot by substituting a spare unit for the
suspected unit.

Assistance in troubleshooting is available from the
factory. When calling, you should have a VOM and a
test set available and be calling from the job site. Call
[phone] and ask for Technical Support or call
[phone] for Valcom 24-hour Faxback System or
visit our website at http://www.valcom.com.

Valcom equipment is not field repairable. Valcom, Inc.
maintains service facilities in Roanoke, VA. Should
repairs be necessary, attach a tag to the unit clearly
stating your company name, address, phone number,
contact person and the nature of the problem. Send
the unit to:

on black lead.
B. Verify volume control turned up (Clockwise).
C. Try shorting red and green or brown and green
at horn and listen for output.

Valcom, Inc.

Repair and Return Dept.

5614 Hollins Road

Roanoke, VA 24019-5056

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VALCOM LIMITED WARRANTY

Valcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair or
refund of any such defective device within the warranty period, provided that:

1. inspection by Valcom, Inc. indicates the validity of the claim;

2. the defect is not the result of damage, misuse or negligence after the original shipment;

3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (A service
charge plus parts and labor will be applied to units defaced or physically damaged);

4. freight charges for the return of products to Valcom are prepaid;

5. all units ‘out of warranty’ are subject to a service charge. The service charge will cover minor repairs (Major repairs will be
subject to additional charges for parts and labor).

This warranty is in lieu of and excludes all other warranties, expressed or implied, and in no event shall Valcom, Inc. be liable
for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection with the
purchase, operation or use of the product.

This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.

Headquarters: In Canada
Valcom, Inc. CMX Corporation
5614 Hollins Road 35 Van Kirk Drive #11 and 12
Roanoke, VA 24019-5056 Brampton, Ontario L7A 1A5
Phone: [phone] Phone: [phone]
FAX: [phone] FAX: [phone]

"C" Clamp

Speaker Base

Figure 2 - Mounting to a Beam with a "C" Clamp

Wire

Position
Adjustment
Knob

Electrical
Backbox

I-Beam

Position
Adjustment
Knob

Figure 3 - Mounting to an Electrical Backbox

Speaker
Base

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