LINE MONITORING AND AMPLIFIER CHANGEOVER

Introduction :

Speaker line monitoring which detects fault in speaker circuits and changeover panel for standby amplifier takeover of failed duty units are features required to comply with EN54 and BS5839 Part 8 standards, as well as other localised regulations.

Amperes has what are required to perform those functions, as tabulated below.

SPEAKER LINE MONITORING

LS4808   :  8 / 16 Ch Speaker Line Monitoring

LS4816

STANDBY AMPLIFIER CHANGEOVER UNIT

 

AC3801  :  8 Duty / 1 Standby Manual Changeover Unit

AX3800  :  8 Duty / 1 Standby Auto Changeover Unit

AMPLIFIER MONITORING

 

AM4120  :  12 Ch Amplifier Monitor Panel

AS4000   :  Amplifier Surveillance Module

 

LS4808 / 4816 : 8 / 16 CH SPEAKER LINE SURVEILLANCE

LS4808 Front LR.png
LS4816 Front LR.png

Available Documents

Catalogue

Instruction Manual

ACAD Image ( on request )

Latest update : Oct 19 V2.11

Manual

Catalog

Drawing

Drawing

LS4816

LS4808

Firmware

Introduction

LS4808 and LS4816 are all new speaker line monitoring unit, replacing the long running LS4600. Now available in 2 versions ; 8 and 16 channels types.

With their new processor and measurement algorithm, they are now able to perform tasks faster with better accuracy. Additional features included were trigger monitoring, which can be linked to timer for preset times activation.

Similar to its previous model, they provide reliable speaker circuit monitoring for ground leakage, short and open circuit using impedance measurement method, thus eliminating the use of blocking capacitors and end line resistors. 

Technical Specifications

Power requirement :    

   Voltage       

   Consumption  

Processor   

Capacity     

Detection range  

Load measurement  

Accuracy      

Pilot tone injection 

Tone level        

Detection period   

Triggering        

Detection interval

Sensitivity   

Indicators   

LCD display  

Audible alert  

Dry contact    

DC output   

Dimensions (mm)  

                             

Weight   

  

24V DC

3.8 / 4.9 W 

32 bit ARM processor

8 / 16 channel

10 to 10K Ohm

10W to 1000W 100V Line

+/- 3%

1 KHz

5V sine

0.5 sec

Auto / manual

Preset 1m to 48 hrs

User preset

Normal, Buzzer, Auto

2 x 16 charactors

Buzzer with off option

3A

24V DC overriding

LS4808 : 482 X 44 X 180

LS4816 : 482 x 88 x 180

2.4 / 3.1 kg

  • 8 / 16 channel versions

  • Basic and advance level setting

  • Sensitivity setting 

  • Impedance measurement method ; end line resistors, block capacitors not required

  • Faulty circuit disconnection option

  • Built in impedance meter ; 10 to 10K Ohm

  • Fault alert bicolour LED with buzzer

  • Interval detection from 1m to 48 hrs

  • Remote detection activation 

  • Short burst signal for lesser interruption

  • Aux contact for 24V overriding during activation period

  • RS485 for remote monitoring

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AC3801 : 8 DUTY / 1 STANDBY AMPLIFIER CHANGEOVER UNIT

AC3801 Front LR.png

Available Documents

Catalogue

Instruction Manual

ACAD Image 

Manual

Catalog

Drawing

Introduction

AC3801 succeeded its predecessor AC3601 and AX700, and now is presented as a combination of the two models in one unit with additional inputs for duty amplifiers. It is now with 8 duty / 1 standby, comes with priority changeover and cascade feature.

It has option for manual changeover or auto for amplifiers with fault detection contacts.

Technical Specifications

Operating voltage 

Power consumption

                 

Zone load   

Inputs              

Indications       

Switching mode  

                             

Cabling       

Cable size  

Cascade     

Dimensions    

Weight             

24V DC ; 0.2 A

Standby : 82 mW

Changeover : 1.5 W

500W / 100V 

8 duty / 1 standby

Front panel LED

Front switch ( manual )

Dry contact ( auto )

Plug in connectors

2.5 mm

Unlimited

482 X 44 X 180 mm

1.96 kg

  • 8 duty / 1 standby capacity

  • Expandable / cascade for more than 8 duty amps with 1 standby

  • Single takeover to prevent overload

  • Prioritised changeover 

  • Manual front panel changeover selection

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AX3800  :  8 DUTY / 1 STANDBY AUTO AMP. CHANGEOVER

Available Documents

Catalogue

Instruction Manual

ACAD Image 

Manual

Catalog

Drawing

Introduction

AX3800 is 8 duty / 1 standby auto changeover unit , providing a switching platform for standby unit to replace the position of failed duty amplifier. Should one standby unit is required to serve more than 8 power packs, more than one AX3800 can be cascaded.

It provides switching both at input and output section, thus suitable for matrix system where all amplifiers has different input sources. Detection is via 20 KHz, which is inaudible to human ears.

While it is compatible for most makes of amplifiers, please check the specifications of the amplifiers as they may have high frequency cut off, which would make the overall changeover functions unstable.

Technical Specifications

Operating voltage   

Power consumption 

Configuration   

Input signal      

Input impedance  

Input gain         

Pilot tone       

Zone load           

Detection       

Detection level 

Failure detection  

Failure recovery    

Indications         

                      

Cabling          

Cable size     

Cascade        

Dimensions   

Weight      

24V DC ; 1 A

6.8 W

8 duty / 1 standby

8 Ch balanced

10 K Ohm

Unity

20 KHz / 8 secs interval

500W / 100V 

70 / 100V line

50V rms min

7 to 15 seconds

20 sec max

Front panel LED

Buzzer

 

Plug in connectors

2.5 mm

2

482 X 88 X 180 mm

2.85 kg

  • 8 duty / 1 standby setup 

  • Cascade feature available

  • Built in Pilot Tone transmitted at intervals to reduce amp loading

  • Overloading protections with single changeover

  • Prioritised changeover

  • Short detection from 7 to 15 seconds

  • Input and output section switching

  • Easier connections for links

  • Channel isolation for unused ports

  • RS485 data port

Rear View

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AM4120  :  12 CH AMPLIFIER MONITOR PANEL

AM4120 Front LR.png

Available Documents

Catalogue

Instruction Manual

ACAD Image 

Manual

Catalog

Drawing

Introduction

It is used to monitor amplifier audio outputs installed at rack for 70 and 100V line amplifiers. AM4120 comes with LED level meter and 1W speaker, catering for 12 amplifier outputs.

It is used to facilitate output level calibration of each output of the power packs and also to listen to the sound at rack, without having to run to the zone for checking.

  • 12 inputs for 70 / 100V line

  • Audio output with 1W speaker

  • LED level meter

Technical Specifications

Power requirement :    

   Voltage       

   Consumption   

                                     

Inputs            

Input level   

Monitor mode      

 

                           

Dimensions     

Weight                  

24V DC 

50mW

                                     

12 channels

70 / 100V line

 

Audio : 1W spk with presets

Selected channel LED

482 X 44 X 180 mm

2.1 kg

Amplifier Monitor Panel

Rear View

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AS4000  :  AMPLIFIER MONITOR MODULE

Introduction

Technical Specifications

Power requirement :    

   Voltage       

   Consumption 

                                     

Input impedance  

Output impedance  

Max audio input  

Max audio output

Transmit interval 

Detection delay  

Recovery time       

Detection output  

Dimensions

Weight            

24V DC 

200mW

                                     

10K Ohm

600 Ohm

0.75 V

1.2 V

10 seconds

20 seconds

30 seconds

NO / NC dry contacts

120 X 96 X 28 mm

330 g

AS4000 is used to monitor the status of 70 / 100V line power amplifiers which do not have built in detection module. Each AS4000 shall be connected to individual power pack and dry contact from it shall be used to activate a changeover of AC3801 when failure is detected.  This contact may also be used for other purpose.

Available Documents

Catalogue

Instruction Manual

ACAD Image 

Manual

Catalog

  • Interval Pilot Tone injection to reduce loading to amplifiers

  • Works independently; with or without audio signal

  • Low distortion to original audio

  • Status monitoring : Pilot Tone and amp fault

  • Compatible with most 70 / 100V line amplifiers

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Last updated on  4 Nov 2019
amperes electronics sdn bhd
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