GAI-Tronics DSA-201 User manual

Pub.: 42004-452A
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model DSA-201
Remote Speaker Amplifier
TABLE OF CONTENTS
Confidentiality Notice.....................................................................................................................1
General Information.......................................................................................................................1
Product Overview ...................................................................................................................................1
System Requirements and Limitations.................................................................................................1
Features and Functions ..........................................................................................................................1
Description of Major Components........................................................................................................2
Installation ......................................................................................................................................3
General Information...............................................................................................................................3
General Installation Guidelines.............................................................................................................3
Security Hardware..................................................................................................................................3
Conduit Installation Details...................................................................................................................4
Mounting..................................................................................................................................................4
Field Wire Installation............................................................................................................................5
Power ....................................................................................................................................................................5
Audio Input /Output..............................................................................................................................................5
Speaker .................................................................................................................................................................5
Audio Adjustments.................................................................................................................................5
Volume Control ....................................................................................................................................................5
Gain Adjustment ...................................................................................................................................................5
System Interconnection..........................................................................................................................7
Operation.........................................................................................................................................8
Power Status .........................................................................................................................................................8
Fault Status ...........................................................................................................................................................8
Maintenance....................................................................................................................................8
General Information...............................................................................................................................8
Troubleshooting......................................................................................................................................9
Service ..................................................................................................................................................................9
Specifications ................................................................................................................................10
Replacement Parts................................................................................................................................10

Pub. 42004-452A
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model DSA-201
Remote Speaker Amplifier
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics retains
all intellectual property and other rights in or to the information contained herein, and such information may
only be used in connection with the operation of your GAI-Tronics product or system. This manual may
not be disclosed in any form, in whole or in part, directly or indirectly, to any third party.
General Information
Product Overview
The GAI-Tronics Digital Intercom system is designed for use in
hazardous and non-hazardous area communications, both indoors
and outdoors, and in high noise areas.
The Model DSA-201 Remote Speaker Amplifier is designed
specifically to enable audio received by a DHxSeries Intercom
Station to be broadcast into high noise areas.
System Requirements and Limitations
The DSA Series Remote Speaker Amplifier requires a 24 V ac or
dc power source to operate. A DHxIntercom Station with an
audio line output is required as the audio source.
Audio received by the DHxIntercom Station is automatically
transmitted to the remote speaker amplifier, except when the
intercom station’s handset is off-hook. A maximum of six remote
speaker amplifiers can be connected to a single Intercom Station.
Features and Functions
•24 V ac or dc power •Power indicator
•Enclosure rated Type 4X •Fault indicator
•12-watt speaker amplifier •Suitable for Div. 2 Hazardous Areas
•Volume control •UL Listed
•Gain control •CE Mark
Figure 1. Model DSA-201 Remote
Speaker Amplifier

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Description of Major Components
The Model DSA-201 Remote Speaker Amplifier consists of a rear enclosure and a front panel assembly.
The front panel assembly contains power and fault status indicators. See Figure 1.
Controls for speaker volume and gain are provided on the 69829-10xspeaker amplifier PCBA, which is
housed in the rear enclosure. All field terminations (audio in/out, power, and speaker) are made in the rear
enclosure. Refer to Figure 2 and Figure 6.
Figure 2. DSA Series Remote Speaker Amplifier Outline - Interior View

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Installation
General Information
CAUTION This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D,
Class II Division 2, Groups F, and G, Class III OR non-hazardous locations only. Combinations of
equipment in your system are subject to investigation by the local Authority Having Jurisdiction at
the time of installation.
WARNING EXPLOSION HAZARD – Do not disconnect equipment unless power has been
removed or the area is known to be non-hazardous.
WARNING EXPLOSION HAZARD - Substitution of components may impair suitability
for Class I, Division 2.
Averttissement – Risque d’explosion - la substitition de composants peut rendre ce matériel
inacceptable pour les em-placements de Classe 1, Division 2.
Averttissement – Risque d’explosion – avant de déconnector l’equipment, couper le courant ou
s’assurer que l’emplacement est désigné non dandereux.
Install equipment without modification and according to all applicable local and national electrical codes.
USA and Canada -Consult the National Electrical Code (NFPA 70), Canadian Standards Association
(CSA 22.1), and local codes for specific requirements regarding your installation. Class 2 circuit wiring
must be performed in accordance with NEC 725.55.
General Installation Guidelines
This station contains a high gain amplifier that enables operation in high noise environments. To prevent
feedback problems in the system, the ambient noise levels, volume settings, and station placement must be
taken into consideration. This minimum spacing requirement between stations can be reduced under the
following conditions:
•Pointing the speaker as away from Intercom Stations
•Placing the speaker in separate rooms from Intercom Stations
•Reducing volume levels
Security Hardware
The Model DSA-201 is vandal resistant. The front panel is attached to its enclosure with security screws.
A GAI-Tronics Model 233-001 Security Screwdriver or Torx T-25 security head tip (sold separately) is
required for installing or removing the front panel.

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Conduit Installation Details
GAI-Tronics recommends installing wiring in conduit to protect against accidental damage and vandalism.
To prevent moisture from entering the enclosure, we strongly recommend the following:
•Conduit should enter the enclosure from the bottom.
•If entered from the top, the conduit must be internally sealed to prevent moisture ingress.
•Sealed fittings should be installed at all cable entry points.
•Silicone sealant or equivalent should be applied around and inside all conduit entries.
Figure 3. Bottom entry conduit installation details
for metallic enclosures
Figure 4. Top entry conduit installation details for
metallic enclosures (NOT recommended)
Mounting
The mounting and wiring instructions are as follows:
1. Remove the four security screws from the front of the intercom station, and separate the front panel
from the rear enclosure. Place the front panel and the screws in a safe location.
2. Secure the rear enclosure to the mounting surface using the four 0.28-inch mounting holes provided
along with four ¼-inch diameter bolts of the appropriate length for the mounting surface.
3. Install the field wiring according to the instructions provided on page 5.
4. Adjust the audio levels as described on page 5.
5. Complete the installation by reattaching the front panel assembly to the rear enclosure using the four
security screws and a toque setting of 30 in-lbs. or 35 cm-kg.
NOTE:When using the GAI-Tronics Model 231-001 Pole Mounting Kit, follow the mounting instructions
provided in the kit.

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Field Wire Installation
1. Unfasten the front panel assembly and disconnect both LEDs from the 69829-10xSpeaker Amplifier
PCBA located in the rear enclosure.
2. Pull all wiring into the termination enclosure. Remove the 69829-10xSpeaker Amplifier PCBA if
necessary. The use of ferrules is recommended on the ends of stranded wire to create a secure, reliable
connection.
3. Install all connections as indicated below. Refer to Figure 5 for the location of the PCBA components
wiring details and Figure 6 for the wiring details of the typical system configuration.
NOTE:USA AND CANADA - Consult the National Electrical Code (NFPA 70), Canadian Standards
Association (CSA 22.1), and local codes for the specific requirements regarding your installation. Install all
equipment without modification and according to the local and national codes. Install conduit and seals
where required. Class 2 circuit wiring must be performed in accordance with NEC 725.55.
Power
This assembly operates from a 24 V ac or dc power source. A separate power feed is recommended for
each remote amplifier. Terminal block TB8 is provided for connection of power to the station. Also, the
enclosure must be connected to earth ground. Install a ring lug on the ground conductor prior to connection
to the enclosure. Secure the ring lug to the #6 ground screw on the rear enclosure.
Audio Input /Output
Terminal block TB6 has been provided to terminate the audio input line to this amplifier. An additional
terminal block TB7 has been provided to feed the next amplifier in the chain, if applicable. The connection
is not polarity sensitive.
Speaker
Terminal block TB5 has been provided to terminate the speaker or horn. The connection is not p
Audio Adjustments
Volume Control
Potentiometer R38 has been provided for volume control. To increase the volume to the speaker, rotate
R38 clockwise. To decrease the volume to the speaker, rotate R38 counterclockwise.
Gain Adjustment
This amplifier assembly contains four user adjustable gain settings:
•0 dB
•6 dB
•12 dB
•24 dB
These settings enable the user to control the maximum gain of the amplifier. The 24-dB setting provides
the maximum gain from the amplifier and the 0-dB setting enables the minimum gain. Configuration
jumpers P9 and P6 have been supplied to set the gain. Refer to Table 1 for the desired gain settings.

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Table 1. Gain Settings
Setting Jumper P6 Jumper P9
0 dB 0 0
6 dB 0 1
12 dB 1 0
24 dB 1 1
Figure 5. 69829-10xRemote Speaker Amplifier PCBA

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System Interconnection
Refer to Figure 6 for a typical system wiring diagram.
Figure 6. Typical system interconnection diagram

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Operation
The Model DSA-201 Remote Speaker Amplifiers are designed to amplify audio received by the digital
intercom stations. The audio is transmitted to this station via the digital intercom station’s audio line. The
audio line can be routed to multiple Remote Speaker Amplifiers for broadcast into additional areas.
Power Status
The Power Status LED on the front panel indicates when power is applied to the unit.
Fault Status
The Fault Status LED on the front panel indicates when an amplifier fault (speaker line fault) has occurred.
The speaker line fault must be repaired and power to this unit must be cycled in order to reset the fault
indication.
Maintenance
General Information
WARNING Always remove power to this station and any associated equipment before
beginning any maintenance.
1. Inspect and replace frayed or cracked wiring.
2. Secure/replace loose wires, ferrules, and terminal lugs.
3. Remove corrosion from terminals.
4. Inspect fuses F5 and F6 of the Remote Amplifier PCBA.

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Troubleshooting
Problem Possible Solution
Low speaker volume Increase the volume settings via potentiometer R38 and/or increase the gain
setting via P9 and P6.
High speaker volume Decrease the volume settings via potentiometer R38 and/or decrease the gain
setting via P9 and P6.
No speaker output Increase the volume settings via potentiometer R38. Verify power is applied
to the unit at TB8. Verify audio is present at the audio input TB6.
No power indication Verify power is applied to the unit at TB8. Check fuses F5 and F6. Replace
fuses with identical rating/type if faulty.
Fault Indication An amplifier fault is an indication that a speaker line fault has occurred.
Repair the speaker line fault and cycle power (off/on) in order to reset the fault
indication.
Feedback 1. Point the speakers away from the interfering station.
2. Reduce the speaker volume.
3. Increase the distance between the speaker and the interfering station.
4. Two digital intercom stations can be barred from communication. Refer to
the “Protection against Feedback Configuration” section of the Central
Switch manual for details.
Service
If your Intercom Station requires service, contact your Regional Service Center for a return authorization
number (RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number
and a purchase order number. If the equipment is under warranty, repairs will be made without charge.
Please include a written explanation of all defects to assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help identifying the Regional
Service Center closest to you.