Page 1 and 8 - avctsb.com Manual/PX2000.pdf · INSTRUCTION MANUAL amperes ... the emerging...

INSTRUCTION MANUAL

amperes ... the emerging preference

PUBLIC ADDRESS POWER AMPLIFIER

PX SERIES with built in AutoFault Sensor

PX2100 - 120 WattsPX2200 - 240 WattsPX2300 - 360 Watts

by - amperes electronics - www.ampereselectronics sdn bhd

POWER

CLIP

PROTECT

POWER

SIGNAL -10 dB

SIGNAL -40 dB PILOT TONE

AMP FAULT

ON

WITH AUTO FAULT SENSING

AUTO FAULT SENSING

amperes360 Watts

PX 2300S

PX2400 - 480 Watts

IMPORTANT SAFETY INSTRUCTIONS

The lightning flash symbol with arrowhead within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure, that may be sufficient magnitude to be a risk of electric shock to person.

The exclamation mark within an equilateral triangle is intended to alert the user to the presence of important operating and

THIS UNIT MUST BE EARTHED

RISK OF ELECTRICAL SHOCK

WARNING !

DO NOT OPEN

WARNING - When using electric products, basic precautions should always be followed including the followings :

1. Read all the SAFE INSTRUCTIONS before using the product.2. This product must be earthed. If it should malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce risk of electric shock.This product is equipped with a cord having an equipment grounding conductor and a grounding plug.The plug must be plugged into an appropriate outlet that is properly installed and earthed in accordance with all local codes and ordinance.

DANGER - Improper connection of the equipment-grounding connector can result in a risk of electric shock. Check with a qualified electrician or servicemen if you are in doubt as to whether the product is properly grounded. Do not modify the plug provided with the product, It it will not fit the outlet, have a proper outlet installed by a qualified electrician.

3. To reduce the risk of injury, close supervision is necessary when the product is used near children.4. Do not use this product near water, for example, near a bathtub, washbowl, kitchen sink, in a wet basement or near a swimming pool or the like.

5. This product should be located so that its location or position does not interfere with its proper ventillation. 6. This product should be located away from heat sources such as radiators, heat registers or other products that produce heat.

7. This product should be connected to a power supply only of the type described on the operating instructions or as marked on the product.8. This product may be equipped with a polarized line plug (one blade wider than the other). This is a safety feature. If you are unable to insert the plug into the outlet, contact an electrician to replace your obsolete outlet. Do not defeat the safety purpose of the plug.

9. The power supply cord of the product should be unplugged from the outlet when left unused for a long period of time. When unplugging the power supply cord, do not pull on the cord, but grasp it by the plug.10. Care should be taken so that object do not fall and liquid are not spilled into the enclosure through openings.

11. The product should be serviced by a qualified service personnel when :a. The power supply cord or the plug has been damaged or,

b. Objects has fallen, or liquid has been spilled into the product, or c. The product has been exposed to rain, or d. The product does not appear to operate normally or exhibits a marked change in performance, or e. The product has been dropped or the enclosure damaged.

12. Do not attempt to service the product beyond that described in the user-maintenance instructions. All other serving should be referred to qualified service personnel.

13. WARNING - do not place objects on the products' power cord or place it in a position where alone could trip over, walk on or roll anything over it. Do not allow the product to rest on or to be installed over power cords of any type. Improper installations of this type create the possibility of fire hazard and / or personal injury.

amperes electronics .... www.ampereselectronics.com

PARTS IDENTIFICATION

1. AC POWER SWITCH


PILOT TONE

AMP FAULT

ON


AUTO FAULT SENSING

amperes360 Watts

PX 2300S

POWER

CLIP

PROTECT

POWER

SIGNAL -10 dB

SIGNAL -40 dBOI

THIS EQUIPMENT REQUIRESADEQUATE VENTILATION

DO NOT BLOCK VENT

MAINS : 230V +/-10%AC 50 / 60HZ

BALANCED INPUT1V / 10K ?

GROUND LIFT

FLOAT FRAME

INPUT LINK

PRESS TO RESETBREAKER

OFFON

PILOT TONE

TO AX700

AC 5ADC 15A

PX

2 20 0

S

70V

(21

?)

1 00V

( 42

?)

CO

M

+24

V

SPEAKER OUTPUT

31V

(4?

)

+24

VDC INPUT

-24V

-24V

1 2 3 4

5 6 7

8 9 10 11 12 13

For switching mains ac supply and the corresponding LED shall lit. Mains LED shallnot lit whenever only DC back up supply is connected.

2. INDICATION LEDS Indication LEDs are : Power for incoming mains AC ; Protect LED to indicate that theunit is under protection mode when the temperature rises to a maximum level and theincoming signal is muted ; Clip to show that the incoming signal level is too high,typically above +4dB ; and Signal LEDs with two levels of -40dB and -10dB.

3. AFS INDICATORS This optional feature - Auto Fault Sensing can be monitored via the LEDs. ON Ledshows the the AFS is switched on ; Fault LED indicates that the unit is diagnosed asfaulty ; and the Pilot Tone LED shall lit at intervals to indicate that a 20kHz signal isbeing sent and received to check the condition of the unit. Whenever a Pilot Tonesignal is being sent, you shall notice that the signal level LED shall lit too. This isnormal.

5. DC SUPPLY Connect back up DC supply from batteries to the connectors using approriate cablesize. Check the rating of amplifier used and the corresponding cable load-size asundersize wire may cause cable overheat and eventually lead to fire.

6. SPEAKER OUTPUT Speaker terminals are available in 4 Ohm, 70 and 100V line outputs. Use only onetype of loading, ie. do not tap 70V output together with 100V line.

Total load should not exceed the capacity of the unit’s rating. The total speakerscombined should have impedance higher than stated in the corresponding outputterminals to avoid overloading.

Do not parallel two amplifiers in order to gain higher power rating as this may causeoverloading in the event that any one of them failed. The amplifier is not designed forparallel configurations.

4. FRONT VENT Ventillation holes for hot air which is blown out from the unit. Kindly ensure there issufficient clearance for heat dissipation in your installation.


PARTS IDENTIFICATION

7. CIRCUIT BREAKERS Manual resetable circuit breakers replaces the conventional fuse replacement, thuseasier maintenance. AC circuit breaker is for the mains whereas the DC is for theinternal DC voltage. To reset, simply press the button after any fault is removed.

8. VENT FAN External cool air is drawn to the unit’s heat sink via the dual speed fan. Whenever theheatsink temperature rises to above 45 deg celcius, the fan speed shall be automaticallyincreased.

9. FAULT CONTACT Whenever a faulty condition is detected, a dry contact shall be established. This port isconnected to Amperes AX700 to enable changeover to take place. This terminal is NOin normal condition. Close contact is establised too when the amplifier is switched off.

10. PT SWITCH The AFS feature can be switched off if required. Switching it off shall render the unit torun as any other normal amplifiers. Switching it ON shall be indicated by the front AFSLEDs.

11. GROUND LIFT

12. INPUT JACKS Incoming signal to the unit is via 3 pin XLR female socket and the adjacent male jack isconnected parallel for linkage to the next unit.

13. VOLUME KNOB Output volume is adjustable from -15dB to 0 dB.

NOTES

EARTH LOOP To avoid hum or noise to the output, the chassis earth and the electrical earth should beseparated by switching Ground Lift Switch ( 11 ) located at the rear panel.

MICROPHONE INPUT The signal input to the amplifier should be line level balanced type using XLR connector.Balanced signal generally cause less noise as compared to unbalanced type. Should anunbalanced signal is to be connected, short the pin 1 and 3 together at the XLR jack.Always remember to have either both ends of cable in balanced or unbalanced mode toavoid undesired results.

SPEAKER CONNECTIONspecified. Connecting speakers to 100V line shall have load equivalent to the sum of all therating of the speakers. Connecting the same loudspeakers to the 70V line shall onlyonsume half of the power. Thereby, twice the number of speakers of the said rating can beconnected to the 70V line terminal.

SPEAKER POLARITY Speakers with ‘+’ terminal should be connected to 100V line output. Sound clarity may becompromised when anti phase connections are made and is apparent when they areinstalled closed to each other.

The sliding switch allows separation of body earthing from signal common to preventhum

Total speakers connected to the output terminals should not exceed the unit’s rating

INTRODUCTION TO AUTO FAULT SENSING (AFS)


The above block diagrams shows a general method of monitoring the condition of the power amplifiers. Somemanufacturers may have different version of sensing but in general, the above concept applies.

Amperes PX series differs from the rest by only injecting Pilot Tone at intervals. This may cause a slight delay indetection of faults but in the long run, it may prevent premature amplifier failure. At cool intervals when pilot tone isnot injected, it means that no signal shall appear and thus no loading. Continuous PT injection may result in fasterdetection, however, it means continuous loading too. Although PT is not audible ( 20 KHz ), it does present at thespeaker ends and this represents pushing the unit to work all the time even though audio signal is not injected.

Amperes identifies the setback of continuous monitoring, thereby we employ a moderate method, ie. to inject atintervals. *** request for continuous monitoring can be fulfilled upon request.

AFS forms an integral part of Amperes PX series of amplifiers and thuseliminates the need to add external module for the monitoring of the powerpack. This does not only reduces the cabling complexities but also in overallcost of installation. Connecting the PX amplifiers to Amperes AX autochangeover panel shall then form an automatic amplifier monitoring systemwhich initiates a standby amplifier takeover, thus ensuring continuous anduninterrupted paging setup.

AUTO FAULT SENSING

ONAMP FAULTPILOT TONE

AFS indications located at front panel

AMPLIFICATIONSSIGNAL MIXING

PILOT TONE SIGNALGENERATION ANDSIGNAL RETURN

DETECTION /TRIGGERING CIRCUIT

AUDIO SIGNAL INPUTAND CONVERSION

CIRCUIT

AUDIO SIGNAL FROMMIXER PRE AMPLIFIEROR OTHER LINE INPUT

(BALANCED)

DRY CONTACTPROVISION ( NO)FOR CONNECTION TOAMPERES AX700

70 / 100V LINEOUTPUTS TO AX700ZONE SELECTORS /SPEAKERS / ETC

PILOT TONE DETECTION

DRY CONTACT ( FAULT - CLOSE CONTACT)

PILOT TONE

AUDIO

PILOT TONEAND AUDIOSIGNAL

WITHIN AMPLIFIER UNIT

OUTPUT

Block diagram showing theconcept of AFS functionemployed by PX seriesamplifiers.

OFFON

PILOT TONE

TO AX700

AFS section at rear panel

The standard feature available in PX series can beswitched off if required, thereby rendering the unit tobe operating like any other type of normal amplifiers.

This can be done by sliding the switch to OFFposition. In this condition, the front section AFS LEDindicators shall be turned off as well.

For a complete setup, link PX amplifiers to AmperesAX700 with the contact port connected to the correspond-ing triggering terminal at the latter.

The quantity of AX700 shall be according to the number ofamplifiers available in the system. Each AX700 can caterfor 6 ut duty and 1 standby amplifiers. Cascade AX700 ifnecessary.


BLOCK DIAGRAM

100V70 V25 VCOMMON

OUTPUTTERMINALS

DRY CONTACT TOAMPERES AX700

TRIGGERING TERMINALS

AUDIOINPUTJACK

PARALLELOUTPUT TO NEXT UNIT

INCOMINGAC POWER

SUPPLY

BACK UP BATTERY INPUT

( 24V DC )

28V DC OUTPUT TO INTERNAL

CIRCUITRIES

AFS LED indicators

The above block diagram is illustrative only and does not represent the actual or detailed construction schematic. Detailed circuit shall be available only to our authorised service centres.

LED indicators

AFS Pilot Tone generation and PT feedback detection circuis

PT on/off switch

Level adjust

Ground lift switch

Signal conversion

Thermistor - Q point - temperature

Thermistor - fan speed / thermal cut offCut off temp - 85C

Dual speed fanThreshold - 45C

Mixing and Protectioncircuits

Amp circuit

Step-uptransformer

Bridge rectifier

Mains step down transformer

DC blocking rectifier

AC circuitbreaker

DC circuit breaker

Mainsswitch

INSTALLATION


PILOT TONE

AMP FAULT

ON


AUTO FAULT SENSING

amperes360 Watts

PX 2300S

POWER

CLIP

PROTECT

POWER

SIGNAL -10 dB

SIGNAL -40 dBOI

PILOT TONE

AMP FAULT

ON

AUTO FAULT SENSING

OI

PX 2100 amperes

SIGNAL -40 dB

SIGNAL -10 dB

POWER

PROTECT

CLIP

2100PX120 Watts

POWER

HOT AIR

HOT AIR

HOT AIR

HOT AIR

HOT AIR

HOT AIR

AIR INTAKE

AIR INTAKE

PX2200 / 2300

PX2100

The diagrams show the air intakeand heat dissipation patterns of theamplifiers.

Please note that the intake patternfor PX2100 differs from PX2200and PX2300.

It is recommended that a minimumspace of 100 mm be madeavailable at each vent hole to allowa comfortable breathing clearance.

amperes

amperes

PILOT TONE

AMP FAULT

ON


AUTO FAULT SENSING

amperes360 Watts

PX 2300S

POWER

CLIP

PROTECT

POWER

SIGNAL -10 dB

SIGNAL -40 dBOI


CLIP

SIGNAL -10 dB

SIGNAL -40 dBO

amperes360 Watts

PX 2300S

V E N TPANEL

V E N TPANEL

In rack installation, where large quantities ofamplifiers are to be installed, it is recommendedthat a ventilation panel to be mounted on top ofeach unit.

On top of the rack, a suction fan should beinstalled to draw off warm air produced by theamplifiers.

Rear panels or door of the rack should be ventedand in some cases, a suction fan should beinstalled to allow better air flow within the enclosedarea.

Optimum operating temperature of the power pack shall be below 45 ~50 deg C. The temperature measured isreferred to the exit end of the heat sinks where thermistors are located.

Do not be alarmed when the fan speed rises above normal as this is activated automatically when the internaltemperature rises above 45 deg C. Under extreme condition, the unit shall be muted when the heat rises to 85 deg C. This can be caused by accumulated heat around the units which is then blown back to the amplifiers dueto poor ventilation design... or if the output from the amplifier is shorted which causes the heat to rise exponen-tially.


SCHEMATIC - NORMAL PAGING SETUP

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SCHEMATIC - UNINTERRUPTED PAGING SETUP


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www.ampereselectronics.com

TECHNICAL SPECIFICATIONS

ELECTRICALPower requirement

Rated output

Output impedance / line

Power consumption

Input sensitivityInput gain controlInput connectionsFrequency ResponseSignal / Noise ratio (at 1 KHz, 0 dB)

Protections

IndicatorsCooling system

AUTO FAULT DETECTIONDetection intervalDetection responseDetection methodFailure recovery timeFailure output

PHYSICALDimensions (H x W x D mm)

WeightColour

AC 230/240V : 50/60 Hz24V DC : PX2100S - 6A ; PX2200S - 19A

PX2300S - 29A ; PX2400S - 35APX2100S : 120W 100V linePX2200S : 240W 100V linePX2300S : 360W 100V linePX2400S : 480W 100V line

PX2100S : 4 ohm (22V) / 42 ohm (70V) / 83 ohm (100V)PX2200S : 4 ohm (31V) / 21 ohm (70V) / 42 ohm (100V)PX2300S : 4 ohm (38V) / 13.6 ohm (70V) / 27.8 ohm (100V)PX2400S : 4 ohm (44V) / 10 ohm (70V) / 21 ohm (100V)PX2100S : No input - 30VA, Rated output - 230 VAPX2200S : No input - 38VA, Rated output - 720 VAPX2300S : No input - 40VA, Rated output - 1080 VA

1V / 10 K Ohm-15 dB to 0 dBXLR balanced input80 - 17 kHz 0/-5 dB> 80 dB

Thermal overload muting /AC and DC manual reset circuit breaker / Momentary short circuitInput Mains ; Clip ; Protect mode ; Input signalFan forced cooling with dual speed thermal controlled presets

10 seconds15 - 25 secondsInternal pilot tone at 20 kHz20 seconds maxDry contact ( NO at 3A

rating )

PX2100S (88x482x300) mm PX2200S / PX2300S / PX2400S (133x482x300) mm

PX2100S - 11.6kg : PX2200S - 21kg : PX2300S - 24.2kg : PX2400S - 29kgBlack ; powder epoxy coated

Due to our continuous product improvement policy, we reserve the rights to change the above specifications, features and artwork without prior notice.

While every care was taken to ensure the data produced in this manual is correct at time of printing, we apologize if there were to be any error that may have been unintentionally presented or omitted.

PX2400S : No input - 40VA, Rated output - 1180 VA

Updated OCT 2007

Amperes Electronics Sdn BhdCo Reg : 509025-X

www.ampereselectronics.com

Only Amperes Electronics Service Centres are allowed to make warranty repairs : a list of Amperes ElectronicsService Centres may be asked for by the purchaser or send directly to Amperes Electronics Sdn Bhd or itsauthorized master distributor, Amperes Global Marketing. This warranty is not valid if repairs are performed byunauthorized personnel or service centres.

This warranty covers only repairs and replacement of defective parts ; cost and risks of transportation as well asremoval and installation of the product from the main system are for the account of the purchaser. This warrantyshall not extend to the replacement of the unit.

This warranty does not cover damages caused by misuse, neglect, accident of the product as well as using theproduct with power supply voltage other than shown on the product, or any other power supply source / adaptornot recommended by the manufacturer.

This warranty does not cover damages caused by fire, earthquakes, floods. lightning and every cause not directlyrelated to the unit.

This warranty does not include any indemnity in favor of the purchaser or the dealer for the period out of use ofthe unit; moreover the warranty does not cover any damages which may be caused to people and things whenusing the product.

This warranty certificate is valid only for the described product, and is not valid if modifications are made on thiscertificate or on the identification label applied on the product.

This warranty covers all the material and manufacturing defects and is valid for a period of 12 months from thedate of purchase or for a longer period in countries where this is stated by a national law. In this case, theextension is valid only in the country where the product is purchased.

Amperes Electronics Sdn Bhd is not obliged to modify previously manufactured products under warranty if thedesign changes or improvements are made.

WARRANTY CONDITIONS

DISCLAIMER

Information contained in this manual is subject to change without prior notice and does not represent acommitment on the part of the vendor. AMPERES ELECTRONICS SDN BHD shall not be liable for any loss ordamages whatsoever arising from the use of information or any error contained in this manual.

It is recommended that all services and repairs on this product be carried out by AMPERES ELECTRONICS SDNBHD or its authorized service agents.

AMPERES series must only be used for the purpose they were intended by the manufacturer and in conjunctionwith this operating manual.

AMPERES ELECTRONICS SDN BHD cannot accept any liability whatsoever for any loss or damages caused byservice, maintenance or repair by unauthorized personnel, or by use other than that intended by themanufacturer.

It is understood that the purchaser accepted and had read through the above terms and conditions of warrantyand disclaimer upon unpacking and tested the product.

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