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Guardian Telecom Inc. 

 

Installation and Operation 

Model AS12 

 

Page 11 

 

 

 

Guardian Product Return 

Guardian products have been quality tested and are in full working order when 
shipped from the factory, given the rugged nature of these products shipping is not 
expected to damage a unit. In the unlikely event of a malfunction, Guardian follows the 
three step procedure below. 

Step I - On-Site Correction 

  The most common source of difficulties with a new product is improper installation 

in one of two ways: incorrect wiring connections or connection to an incorrect 
power source. 

  Product wiring needs to be properly connected to the on-site wiring. Correct wiring 

instructions are shown in the user manual included with the product. 

Step II - Return Materials Authorization (RMA) 

  When a product has been installed following user manual instructions, and the unit 

fails to operate, the user must contact Guardian Telecom to obtain authorization to 
return the product.  This can be done by completing a RMA form online at 
www.guardiantelecom.com, or by calling 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 
returned with the product. 

  In addition to the RMA number, shipping documents should include name, address 

and telephone number of the owner along with contact information for the person 
responsible for the repair and/or the user who identified the malfunction. 

  (Where a product is being returned for repair from outside of Canada, customs 

documentation must show the product’s serial number, date of export [date of 
purchase], and a notation that the equipment is: (“Canadian goods returning”). 

Step III - Factory Authorized Service 

  Once received, each product is carefully inspected and tested. If the product is 

under warranty, repairs are completed and the product returned to the owner, 
generally within five working days of receipt by the factory. 

  A product that has been subjected to misuse, neglect or accident or is beyond the 

warranty period will be evaluated. The service department will provide the owner’s 
representative with a repair cost estimate. Once approved, repairs are completed 
and the product returned, generally within five working days. 

 

 

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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