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Guardian Telecom Inc. 

 

Installation and Operation 

Model AS12 

 

Page 7 

 

 

 

Installing the AS12 

 

  Inspect the product for shipping damage.  

Tip: If the product is damaged, 
notify the carrier immediately. 

  Do not open or attempt to open the AS12 unit.  There are no user 

serviceable parts inside the unit. 

Tip: Unauthorized modifications 
void the product warranty. 

  Carefully plan input and output connections.  

o

  Identify input and output devices. 

o

  Prioritize amplifier inputs.  Channel #1 is the highest priority. If 

more than one amplifier fails at the same time, the standby 
amplifier will only replace the highest priority, the lowest numbered 
amplifier. 

Tip: Familiarize yourself with 
unit capabilities and functions. 

See: Block Diagram and Unit 
Operation details.  

  Choose a location on a standard 19" equipment rack with three rack 

units (3U) of available space.  

See: Specifications for overall 
dimensions. 

  Do not apply power to the AS12 before connecting input and output 

devices. 

 

  Ensure all devices that will be 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

  Control Logic Inputs 

 

o

  Remove quick disconnect connector (Phoenix Combi-Con).  

 

o

  Wire the connector. 

 

o

  Plug the connector back into the unit. 

 

  Connect input power to a 120 volt AC power source. 

Tip: 240 volt AC input power is 
available as an option. 

  After all connections are complete, apply power to the AS12.  

  Apply power to all input devices. 

See: Connection Details and 
Unit Operation, below. 

Connection Details 

See: Block Diagram. 

  Connect Audio Inputs and Outputs to the Combi-Con connector as 

follows: 

Tip: The maximum switching 
capacity of each circuit is 325 
watts using a 70V paging line. 

o

  Terminal #1 – 70V/100V Audio Out Hot Lead (to Speaker). 

o

  Terminal #2 – 70V/100V Audio Out Common (to Speaker). 

Tip: Terminal #1 is the left 
terminal viewed from the wire 
side. 

o

  Terminal #3 – 70V/100V Audio In Hot Lead (Amplifier Output). 

 

o

  Terminal #4 – 70V/100V Audio In Common Lead (Amplifier Output). 

 

o

  VOX Logic Input – Cable supplied with DA388  

Tip: DB9 connector 

o

  Amp Failure Logic Output – For remote indications of faults. 

 

Содержание AS12

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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