Viking pa-2a Service Manual

Telecommunication Peripheral Products

Technical Practice

PA-2A

Paging Amplifier-

Loud Ringer

June 26, 2000

Add Paging and Multiple Line

Loud Ringing to Any Phone System

The PA-2A provides loud ringing and paging to
electronic key systems, 1A2 Key systems,
PABX’s as well as No-KSU phones and multi­line phones.

Paging is accomplished by connecting the PA-
2A to a paging port or unused C.O. line input of
nearly any phone system.

The PA-2A will also generate an adjustable
loud warble from up to 6 C.O. lines or from a
dry contact closure. An external “night transfer”
switch can be added to turn loud ringing on or
off in night bell applications.

The PA-2A is easy to install and eliminates the installation of multiple bells, relays and
paging cards. The unit comes complete with a power supply, amplifier and (1) paging
horn.

VIKING©

http://www.VikingElectronics.com

[e-mail]

Features Applications

• Two watts of paging power

• Fourth line input is optically coupled for use
with fax switches and analog PABX/KSU
stations

• Ring sensitivity adjustment

• Can provide background music from an
external source

• Paging from an unused trunk port or paging
port

• Loud ringing

• Provides loud electronic ring or night bell, from
1 - 6 lines for warehouses, yards, etc.

• Output for controlling a 12 volt relay from 1 - 6
ringing lines

Made in the U.S.A.

• Amplified loud paging

• Night bell

• Background music

• Loud ringing

Sales...(715) 386 - 8861

Specifications

Power: 120V AC/13.8V AC 1.25A, UL listed adapter provided
Dimensions: 133mm x 89mm x 44mm (5.25” x 3.5” x 1.75”)
Shipping Weight: 1.36 kg (3 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-

condensing humidity
Paging Output: 2 watts - powers up to (3) 8 ohm or (16) 45 ohm
speakers

Sound Pressure: 110 dB @ 1 meter
Speakers: (1) 25AE 8 ohm paging horn included, (3) maximum
Maximum Speaker Run: 91 m (300 ft) maximum 18 AWG
Talk Battery: 24V DC
Connections: (2) RJ25 jacks, (1) 5 position screw terminal block

Installation/Programming

Paging Volume Control

120V AC

-

C.O. lines or

analog

PABX/KSU

stations

Lines 1, 2 and 3

Lines 4, 5 and 6

A. Paging and Loud Ringing

1. Paging Port

a. Move the BATTERY FEED switch to the OFF position.
b. Connect pins 4 and 5 to the paging port output.

Important: Background music can NOT be added when
interfacing the PA-2A to a Paging Port.

Note: For information on speakers to use,

ambient noise levels, and speaker wiring
retrieve Fax Back Document 498.

+

PAGING - LOUD RINGING

AMPLIFIER SYSTEM

VIKING

VIKING

ELECTRONICS

ELECTRONICS

HUDSON, WI 54016

HUDSON,WI 54016

PAGING RINGING

VIKING©

LINES

MODEL PA-2A

BATTERY

FEED

OFF ON

POWER

13.8VAC

RINGING

1-3 4-6

Ringing Volume Control

-

1 2 3 4 5

Note: Pin 3 must be grounded when C.O. lines
are connected to the RINGING LINES ports.

Lines

1, 2 and 3

+

(2) 10K resistors

(included)

PAGING - LOUD RINGING

AMPLIFIER SYSTEM

VIKING

VIKING

ELECTRONICS

ELECTRONICS

HUDSON, WI 54016

HUDSON,WI 54016

PAGING RINGING

VIKING©

RINGING

OFF ON

LINES

Lines

4, 5 and 6

MODEL PA-2A

BATTERY

FEED

POWER

13.8VAC

1-3 4-6

Background Music

Source

Background music may be used with
an unused trunk port only. Remove
the shunt located to the left of the
screw terminal block.

Paging port or

unused trunk port

1 2 3 4 5

Paging Port

see Installation section B, 1.

Ringing Analog Lines

2. Trunk/Line Port

a. Set the BATTERY FEED switch to the ON position.
b. Connect pins 4 and 5 to an unused trunk or line input.
c. Background music may be added as shown. The music level will be greatly reduced during the page.

PAGING - LOUD RINGING

AMPLIFIER SYSTEM

VIKING

VIKING

ELECTRONICS

ELECTRONICS

HUDSON, WI 54016

HUDSON,WI 54016

PAGING RINGING

VIKING©

RINGING

LINES

Lines

4, 5 and 6

MODEL PA-2A

BATTERY

FEED

OFF ON

Lines

1, 2 and 3

POWER

13.8VAC

1-3 4-6

see Installation section B, 1.

Ringing Analog Lines

Note: For information on speakers
retrieve Fax Back Document 498.

1 2 3 4 5

(2) 10K resistors

(included)

Unused

Trunk

Port

Important: If background music is added, remove the

shunt located to the left of the screw terminal block as
shown below.

POWER

13.8VAC

RINGING

1-3 4-6

Background Music Source

PAGING - LOUD RINGING

AMPLIFIER SYSTEM

VIKING

VIKING

ELECTRONICS

HUDSON, WI 54016

ELECTRONICS

HUDSON,WI 54016

PAGING RINGING

VIKING©

MODEL PA-2A

1 2 3 4 5

BATTERY

FEED

OFF ON

LINES

Shunt