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Guardian Telecom Inc. 

 

Installation and Operation 

Model AS12 

 

Page 10 

 

 

 

Warranty 

Guardian Telecom warrants your product to be free of defects in material and workmanship for a 
period of one year.  Guardian Telecom will repair or replace any defective unit that is under warranty 
free of charge. 

This warranty is null and void if any non-authorized modifications have been made to this product

or 

if it has been subjected to misuse, neglect, or accident. This warranty covers bench repairs only; such 
repairs must be made at Guardian Telecom or an authorized service depot. Guardian Telecom is not 
responsible for costs incurred for on-site service calls, freight, or brokerage. 

A return authorization must be obtained prior to warranty claims or repairs. 

Disclaimer 

The products covered by this manual are designed for use in Industrial Environments and/or 
Hazardous Locations.  Due to the range of possible applications for these instruments the 
manufacturer will not be responsible for damages or losses of any kind suffered as a result of the use 
of this product, including consequential damages. 

Warning 

This device has no user serviceable internal components; the only maintenance possible is the 
replacement of the fuse – which is available from the back panel. 

Service Telephone Number 

1-800-363-8010 

Guardian Telecom provides a customer service telephone number which is toll-free within North 
America. If you need assistance when installing or operating this product

please call the toll-free 

telephone number between regular business hours (8:00AM-5:00PM), Mountain Standard Time. If 
you are calling outside of regular business hours, please leave a detailed message, and a member of 
Guardian Telecom’s Service Department will return your call as soon as possible. If your product 
requires service, Guardian personnel will supply you with an RMA (return materials authorization) 
number over the telephone or through our web site product return page. This number must be 
included with your return address and the name of the person to contact. 

Guardian Telecom Inc. 

7552 - 10th Street N.E. 

Calgary, Alberta, Canada T2E 8W1 

Toll-free 1-800-363-8010 

Ph.  (403) 258-3100 

Fax. (403) 253-4967 

www.guardiantelecom.com

 

Feedback 

Guardian Telecom continually strives to make reliable, durable, and easy to use products. If you, as 
an installer or user of our equipment, have any suggestions for improvements to this or any of our 
products or documents, including this manual, we would appreciate hearing from you. 

Summary of Contents for AS12

Page 1: ...e Automatic Amplifier Switch Model AS12 Installation and Operation VOX THRESHOLD ADJUSTMENT AMP 1 AMP 2 AMP 3 AMP 4 STAND BY AS 12 AMPLIFIER SWITCH RESET Guardian Telecom Inc P005093 Rev C 070518 7 21...

Page 2: ...mer 10 Warning 10 Service Telephone Number 10 Feedback 10 Guardian Product Return 11 Table of Figures Figure 1 Dimensions 4 Figure 2 Front Panel 4 Figure 3 Rear Panel 5 Figure 4 Block Diagram 6 Figure...

Page 3: ...integrated industrial emergency communications system the AS12 ensures uninterrupted communication in the event of an amplifier failure The AS12 Automatic Amplifier Switch is one component in Guardia...

Page 4: ...r LED See below 3 Fault History Reset Button 4 VOX Threshold Adjustments 5 Backup Threshold Adjustment 6 Backup Amplifier Status Indicator LED See below There are two Status Indicators The top one ind...

Page 5: ...MP 4 FROM BACKUP AMP 1 2 3 4 5 C 1 2 3 4 5 C 220 VAC FUSE 1 A POWER CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 1 2 3 9 8 4 Figure 3 Rear Panel 1 Power ON OFF Switch 2 Fuse 1 Amp 3 Power input for 120 230...

Page 6: ...CHANNEL AUDIO OUTPUTS LOGIC INPUTS CHANNEL PRE AMP ACTIVE ALLOCATOR BACKUP CHANNEL DETECTOR FAIL CHANNEL CONTROL UNIT CH SB CH 4 CH 3 CH 2 CH 1 CH 4 CH 3 CH 2 CH 1 Figure 4 Block Diagram DA388 MIC 1...

Page 7: ...connected to the AS12 are turned off Follow all appropriate electrical codes for the installation Use the following sequence when wiring connections o Audio Inputs See Connection Details below o Cont...

Page 8: ...fails the standby amplifier will also fail Multiple Amplifier Failure If more than one amplifier fails at the same time the standby amplifier will only replace the highest priority the lowest numbered...

Page 9: ...Inputs 5V TTL LEVEL RECOMMENDED ACTIVATING DEVICES DRY CONTACT RELAY MINIMUM OPEN COLLECTOR OPEN DRAIN CURRENT CAPACITY 100mA Logic Outputs 4 Logic Open Drain Outputs OUTPUT SWITCH CURRENT CAPACITY 4...

Page 10: ...rnal components the only maintenance possible is the replacement of the fuse which is available from the back panel Service Telephone Number 1 800 363 8010 Guardian Telecom provides a customer service...

Page 11: ...ng the service telephone number given in this manual After providing information on the product the owner and the nature of the problem Guardian will issue a RMA number to be shown on documentation re...

Page 12: ...Calgary Alberta Canada T2E 8W1 Toll free 1 800 363 8010 Ph 403 258 3100 Fax 403 253 4967 www guardiantelecom com E mail mailto sales guardiantelecom com Click to open message box Industrial Communicat...

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