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CPA240 Configurable Power Amplifier

Page 17 of 35

21031 CPA240 manual V1.31.doc

•

Second amplifier group: Set CH3 M/S switch to ‘master’ and CH4 to ‘slave’ (this parallels

channel 4 to channel 3 master).

•

Wire/configure first amplifier group input/output signals to CH1 (master).

•

Wire/configure second amplifier group input/output signals to CH3 (master).

1 x 240 Watt.

•

Set all Master/Slave switches to ‘slave’ this parallels channels 2, 3 & 4 to channel 1 master

•

Wire/configure channel 1 input/output signals to amplifier channel 1 etc.

4.3 Audio Bus Selector

The Audio Bus allows an amplifier within a system to be connected to a switching matrix such

as an Alpha and/or other CPA240 amplifiers via a ribbon cables.

These ribbon cables couple the sixteen matrix outputs (destinations or zones) to the audio bus

channel pin headers located on the D804 connector card within the amplifier.

Configuring each amplifier master input channel involves linking the desired Audio Bus channel

(matrix zone) to the amplifier input channel using one of the four two way selector cables

supplied.

Note: See advanced configuration for:

•

Connecting two or more input channels to the same Audio Bus ‘zone’ within a single

amplifier (Chain).

•

Connecting (inserting) external signal processing equipment (Send).

4.3.1 Audio Bus Selector Configuration Examples

Connecting matrix zone output 6 to amplifier channel 1 (180W)

•

Connect one end of the two way selector cable to header 6 of the Audio Bus Channel

•

Connect the remaining end to Amplifier Channel ‘I/P’ header 1

•

First amplifier group: Set CH2 & CH3 M/S switch to ‘slave’.

•

Wire/configure first amplifier group input/output signals to CH1 (master).

Connecting matrix zone output 8 to amplifier channel 4 (60W)

•

Connect one end of the two way selector cable to header 8 of the Audio Bus Channel

•

Connect the remaining end to Amplifier Channel ‘I/P’ header 4

•

Second amplifier group: Set CH4 M/S switch to ‘master’

•

Wire/configure second amplifier group input/output signals to CH4 (master).

I/P

Chain

Send

1 2 3 4

Audio Bus Channel

Master

Slave

Master

Summary of Contents for CPA240

Page 1: ...x Systems Station Road Wenden Saffron Walden Essex CB11 4LG Telephone 44 0 1799 540888 Facsimile 44 0 1799 541618 www tycosafetyproducts europe com www audixsystems co uk CPA240 Power Amplifier Manual V1 31 ...

Page 2: ...5 DISCLAIMER This manual contains information that is correct to the best of Audix Systems knowledge It is intended to be a guide and should be used as such It should not be considered as a sole source of technical instruction replacing good technical judgement since all possible situations cannot be anticipated If there are any doubts as to exact installation configuration and or use call Audix S...

Page 3: ...40 Power Amplifier Technical Support Should you require technical assistance regarding the CPA240 Power Amplifier or any other Audix Systems product please contact our Technical Services Department Audix Systems Station Road Wenden Saffron Walden Essex CB11 4LG Tel 01799 540888 Fax 01799 541618 Corporate website www tycosafetyproducts europe com ...

Page 4: ... 13 3 3 1 Input Stage 13 3 3 2 Power Stage 13 3 3 3 Amplifier Protection 13 3 3 4 Amplifier Surveillance Low Power Idle Wakeup 13 3 4 AMPLIFIER DESIGNATION REMOVAL AID 14 3 5 AUDIO BUS ADAPTER 15 3 5 1 Wiring and Assembly Detail 15 4 AMPLIFIER CONFIGURATION 16 4 1 INTERNAL SELECTOR VIEW 16 4 2 MASTER SLAVE 16 4 2 1 Master Slave Configuration Examples 16 4 3 AUDIO BUS SELECTOR 17 4 3 1 Audio Bus Se...

Page 5: ... 10 1 SAFETY CONSIDERATIONS FOR SYSTEM DESIGN AND INSTALLATION 30 10 1 1 Security 30 10 1 2 Electrical 30 10 1 3 Environmental 30 10 1 4 Installation 30 10 2 SAFETY CONSIDERATIONS FOR SYSTEM MAINTENANCE 32 10 2 1 Safety and Electrical Rating Information 32 10 2 2 Electrical Hazards 32 10 2 3 Heat Hazards 32 10 2 4 Weight Hazards 32 11 MAINTENANCE 33 12 COMPONENT REFERENCE NUMBERS 33 13 REAR PANEL ...

Page 6: ... 60Hz switch options Backup supply input 24V DC nominal To be fused at source 25A max Power Consumption max 4 x 60W 510W Amplifier idle quiescent consumption Idle Quiescent wakeup 1 x master channel configured 121mA 1180mA 2 x master channel configured 146mA 1210mA 3 x master channel configured 171mA 1250mA 4 x master channel configured 195mA 1260mA General Heat Dissipation max W 270W Dimensions l...

Page 7: ...el configured 192mA 4 61A 13 82A 4 x master channel configured 216mA 5 18A 15 55A 1 2 2 Operational Consumption The operational power consumption of an amplifier is effected by a number of factors Speaker load Broadcast level Signal type Where the speaker load connected to the amplifier is less than its maximum rated power the proportion of power drawn will be reduced Similarly the level and signa...

Page 8: ...onfigurable Power Amplifier Page 8 of 35 21031 CPA240 manual V1 31 doc The nominal power consumption figure must not be used if a continuous tone alarm is employed 2 Description 2 1 Front View 2 2 Back View 25A ...

Page 9: ...teen zone or destination ribbon cable A link matrix located within the amplifier allows the selection of a single zone destination from the ribbon bus to each amplifier channel i e an amplifier channel may be configured to any one output of the switching matrix Where the ribbon bus cannot be used due to special wiring requirements the auxiliary port D type connector allows solder type connection t...

Page 10: ...Overload Monitor jack Sig Present Amp fault Overload Monitor jack Channel 1 O P Line Monitor Option Channel 2 O P Line Monitor Option Channel 3 O P Line Monitor Option Channel 4 O P Audio Bus Selector Link Matrix 16 Way Audio Ribbon Bus In from source 16 Way Audio Ribbon Bus Out to next amplifier Channel 1 Amplifier Paralleling In Out Port Auxiliary Port Audio Insert send Ch 2 Slaving i p Switch C...

Page 11: ...rolled by that matrix are then connected via the 40 way audio bus cables A wake up connection is also shown The upper amplifier is shown with output channels 1 2 in use This would correspond to 2x60W or 1x60W 1x120W or 1x60W 1x180W configurations The lower amplifies output channel wiring corresponds to a 1x180W 1x60W configuration The CPA240 amplifier is supplied with a one metre IEC plug to socke...

Page 12: ... chassis on the D804 connection card 3 2 3 Auxiliary Port Direct Audio Input Alternative means to connect audio sources to the amplifier is provided by the auxiliary port The D type plug and socket arrangement allows bespoke cabling to be connected via solder joints 3 2 4 Auxiliary Port Insert In addition to the direct audio input connections the auxiliary port provides insert points for each ampl...

Page 13: ...ing thermal shutdown circuit provides protection against damage to the output stage due to overheating The front panel Temp LED indicates amplifier over temperature Ultimate protection of the MOSFET power devices and the power supply is provided by individual 6 3AF channel fusing 3 3 4 Amplifier Surveillance Low Power Idle Wakeup In an attempt to reduce standby battery usage to a minimum in normal...

Page 14: ...31 doc 3 4 Amplifier Designation Removal Aid The CPA240 front panel features both removal aid points and designation cut outs The designation feature allows a cost effective printed pager label to be fitted to the amplifier without glues or tapes See method statements below ...

Page 15: ... connector bus of the CPA240 amplifier One adapter card is required per matrix controller and is to be mounted on the first amplifier to which that matrix is connected The kit also includes two CA30 ribbon cables that connect from the adapter card ribbon header to the D type plugs Screw terminals on the adapter card provide a connection for the amplifier wake up signal where used options of positi...

Page 16: ... of the master slave selectors allows the channels to be paralleled providing 60 120 180 240 Watt configurations There are two master slave selectors per channel they are located on the Power Block D801 and rear connector card D804 CH2 selects channel 2 as a master or slave etc Note Both switches on a channel MUST be set to the same position When wiring to a paralleled amplifier the input and outp...

Page 17: ...ing the desired Audio Bus channel matrix zone to the amplifier input channel using one of the four two way selector cables supplied Note See advanced configuration for Connecting two or more input channels to the same Audio Bus zone within a single amplifier Chain Connecting inserting external signal processing equipment Send 4 3 1 Audio Bus Selector Configuration Examples Connecting matrix zone o...

Page 18: ... repeated for the other channels if required Example shows connection of amplifier inputs 1 2 3 to Zone 1 Amps 1 2 3 will be set as Masters 5 2 Connecting Signal Processors Insert Send Additional signal processing equipment can be connected into the audio bus amplifier path This is achieved by using a selector cable to connect the required audio bus zone to the appropriate channel Send Do not conn...

Page 19: ... and the auxiliary port connector This allows a group of amplifiers to be paralleled giving increased power to a speaker circuit i e paralleling 3 x 180 Watt amplifiers could drive a 540 Watt speaker circuit The maximum permitted amplifier group is five frames i e up to 1200Watts General configuration One amplifier within the group is set as a controller the other as slaves Only channel 1 of the a...

Page 20: ...CPA240 Configurable Power Amplifier Page 20 of 35 21031 CPA240 manual V1 31 doc Each amplifier within the group must be connected together via the link feature ...

Page 21: ...he linking cable to be daisy chained Note The screen of each link cable should only be connected at the source end the other end should be isolated Function Signal Return Screen Amplifier Link 1 17 36 19 Amplifier Link 2 18 37 N C Output Wiring Output 1 of each amplifier within a group should be connected in parallel to the speaker circuit Zone 8 I P Chain Send 1 2 3 4 1 8 9 16 Audio Bus Channel 1...

Page 22: ...uld be removed 5 4 3 Amplifier Group Gain Trim To provide maximum power output and prevent damage to the group the open circuit gain of each amplifier must be matched to within 0 1Volts Method Configure the amplifiers as an amplifier group as described in the previous sections Disconnect amplifier 100V output system cabling Connect a suitable test signal to input channel 1 of the group controller ...

Page 23: ...be mounted on an ODP panel and field terminals wired direct 5 6 Amplifier Low Power Idle Wakeup In some circumstances the low power mode can affect low level background music reproduction To permanently wakeup the amplifier fit the Always Wakeup link Warning Permanently waking up the amplifier will drain battery supplies extremely quickly This option must NOT be used on Voice Alarm Systems unless ...

Page 24: ...nly not monitored the amplifier channel fault indications need to be disabled If this is not carried out the amplifier will display a fault on the front panel This modification reduces system monitoring and therefore must not be used on life safety systems This modification is ONLY for amplifiers using D800 Issue B ...

Page 25: ... of Amplifier Main Voltage Selector V a c 240 230 220 Access hole in side of chassis 6 1 Setting Mains Voltage Selector Using a DVM measure the incoming mains voltage to the amplifier or equipment rack Set the amplifier voltage selector to nearest resulting position see table Repeat setting for all other amplifiers in the equipment rack Voltage measured Voltage selector setting 208 229 220 230 239...

Page 26: ...with BS5839 Part 8 1998 and any other standard it must be specifically designed to achieve that end 7 1 Supply Monitoring The amplifier provides fault monitoring of the primary and secondary power supplies Mains Backup supply 24V DC Battery Indication of supply failure is in the form of the following front panel LEDs Mains supply failure Battery supply low voltage failure Charger failure fault sig...

Page 27: ...doc Although the amplifier will recover once the amplifier has cooled the over temperature indication will remain to inform service personal of its occurrence These fault indications are also repeated at the FMS master panel and may be reset by activation of the FMS fault reset ...

Page 28: ...h figures 9 2 Delays in Delivery If delivery is delayed at Customer request the Company reserves the right to increase its price to cover the extra cost of storage insurance and interest Interest will be at the rate of 3 above Bank of England base rate per month calculated on a day to day basis for the value of the goods held 9 3 Storage Where equipment is stored on site prior to installation it i...

Page 29: ...all be under no liability in contract tort or otherwise for any personal injury loss or damage or whatsoever kind of howsoever caused or for anything done or omitted in connection with the goods or equipment or any work in connection therewith 9 7 Environment The Company cannot be held responsible for any defects arising from humidity and excessive temperatures The products are designed for use at...

Page 30: ...or SBS481 all include a separate fuse on each 24V dc output The fuse rating on the feed to the CPA240 should be 25A fast acting F 25A Where 24V DC standby supply other than Audix range listed are used The DC feed to the CPA240 should be fused at source with a supply fuse rating of 25A fast acting F 25A H 10 1 3 Environmental During the normal operation of the CPA240 the amplifier can dissipate up ...

Page 31: ...support system must not cover the amplifiers ventilation slots and be capable of carrying at lest three times the amplifiers weight i e 45kg With the amplifier in place it should be secured to the equipment rack via the front panel mounting holes using four M6 fixing or similar screws ...

Page 32: ...t This equipment does not include a mains isolation switch therefore the Mains and battery supply where fitted must be disconnected from the apparatus before any part of the casing is removed Mains and other high voltages can be exposed if internal covers are removed 100V signals are present both inside the amplifier and at the 100V line output connector Adequate precautions must be exercised when...

Page 33: ...lease refer to BS5839 Part 1 Code of practice for system design installation and servicing for recommend maintenance levels It is recommended that all members of staff should be urged to report problems with the Public Address or Voice Alarm system i e distortion speakers not operating poor coverage to the department responsible for the maintenance of such equipment 12 Component Reference Numbers ...

Page 34: ...Bus Channel 3 29 30 Input Bus Channel 4 27 28 Input Bus Channel 5 25 26 Input Bus Channel 6 23 24 Input Bus Channel 7 21 22 Input Bus Channel 8 19 20 Input Bus Channel 9 17 18 Input Bus Channel 10 15 16 Input Bus Channel 11 13 14 Input Bus Channel 12 11 12 Input Bus Channel 13 9 10 Input Bus Channel 14 7 8 Input Bus Channel 15 5 6 Input Bus Channel 16 3 4 13 2 Audio Outputs Connector 10 way in lin...

Page 35: ...wer Input Mains fault bus 9 9 PF Surveillance Speaker Line fault bus 10 10 SF Battery fault bus 11 11 BF Accept Test mode control bus 12 12 AC Watchdog Pulse New Watchdog bus 13 13 WP New Fault bus 14 14 NF FMS_COM IN 15 16 FMS_COM in FMS_COM OUT 15 16 FMS_COM out 13 4 Auxiliary Port Channel Inserts Connector 37 way D skt PCB Mounted D804 PL4 Function Signal Return Screen Common overall screen 1 C...

Page 36: ...lied with a mating free connector that should be wired as shown below The connector will accept cable cross sections up to 4mm The ve and 0V supply cables should be designed to take a minimum of 20A continuously The supply monitor terminal provides a means for the amplifier to detect the failure of the backup supply charger Where fitted the supply monitor cable may be equivalent to 16 0 2 Note The...

Page 37: ...CPA240 Configurable Power Amplifier Page 37 of 35 21031 CPA240 manual V1 31 doc ...

Page 38: ...A240 Configurable Power Amplifier Page 38 of 35 21031 CPA240 manual V1 31 doc 14 Electrical Schematic The following diagram shows internal connections with safety critical components and assemblies marked ...

Page 39: ...toring Connection Points Ch 3 Slave OP Switch AF2 ANF2 AC Power Stage Ch3 Amp Fault Output Transformer Idle current detector Overload detector Bias Control Soft Start Ch3 O p Overload Ch 3 Amp Fail Timer and Latch Line Monitoring Connection Points Ch 4 Slave OP Switch AF3 ANF3 AC Power Stage Ch4 Amp Fault Output Transformer Idle current detector Overload detector Bias Control Soft Start Ch4 O p Ov...

Page 40: ...fication reduces system monitoring and therefore must not be used on life safety systems This modification is ONLY for amplifiers using D800 Issue B To disable the amplifier channel fault indications a link wire can be connected between J4 pin 1 and J5 pin 2 on the D800 amplifier control PCB This modification disables the channel fault timeout and therefore the channel fault indicators Charger Bat...

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