Related Manuals for Audix CPA240
Summary of Contents for Audix CPA240
- Page 1 Audix 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...
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Page 2: Revision History
© Copyright Audix Systems. 2005 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. -
Page 3: Models Covered
This user manual covers the following equipment • CPA240 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... -
Page 4: Table Of Contents
CPA240 Configurable Power Amplifier Table of Contents REVISION HISTORY ........................2 MODELS COVERED ........................3 TECHNICAL SUPPORT ....................... 3 APPENDIX A ; A (PA O )..............5 MPLIFIER ISABLE SPECIFICATION ........................6 ........................6 PECIFICATION ....................7 ATTERY ONSUMPTION 1.2.1 Standby Consumption ..................... -
Page 5: Appendix A ; Amplifier Fail Disable (Pa Only)
CPA240 Configurable Power Amplifier FAULT MONITORING FEATURES ..................26 ...................... 26 UPPLY ONITORING ....................26 MPLIFIER ONITORING RACK MOUNTING THE CPA240 ..................28 WARRANTY ........................28 ....................... 28 ERFORMANCE ....................... 28 ELAYS IN ELIVERY ........................28 TORAGE (UK) ................. 28... -
Page 6: Specification
CPA240 Configurable Power Amplifier 1 Specification 1.1 Specification Audio CPA240 Power Amplifier Power amplifier channels 4 (configurable) Maximum Power 240 watts (1kHz @ 100V r.m.s) Amplifier power configurations (switchable) 4 x 60W 1 x 120, 2 x 60W 2 x 120W... -
Page 7: Battery Consumption
CPA240 Configurable Power Amplifier 1.2 Battery Consumption Amplifier power consumption during a mains failure can be calculated by the duration the amplifier remains at standby plus the additional power drawn during its operation. 1.2.1 Standby Consumption The table below details the amplifier battery standby consumption for the four possible master/slave configurations. -
Page 8: Description
CPA240 Configurable Power Amplifier 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 Page 8 of 35 21031 CPA240 manual V1.31.doc... -
Page 9: Brief Description
CPA240 Configurable Power Amplifier 2.3 Brief Description The CPA240 power amplifier provides up to four channels of amplification for both public address and voice alarm applications. The 100-volt line output stages are robustly designed and are protected against open circuits and loads that exceed the channel’s rated power, including short circuits. -
Page 10: Amplifier Features
CPA240 Configurable Power Amplifier 3 Amplifier Features 3.1 CPA240 Simplified Block Schematic Channel 1. Monitor jack Amplifier Paralleling In/Out Port Audio Bus Channel 1 O/P Selector Link Matrix Line Monitor Auxiliary Port Option Audio Overload Insert/send Sig Present Ch.2 Slaving o/p Switch... -
Page 11: Connections
The lower amplifies output channel wiring corresponds to a 1x180W + 1x60W configuration. The CPA240 amplifier is supplied with a one metre IEC plug to socket Mains flex and a battery connector kit (see Back-up supply connector section for wiring and assembly details). -
Page 12: Amplifier Audio Bus
The audio bus selector provides additional connection points for ‘insert’ configuration. 3.2.5 Auxiliary Port - Amplifier Linking CPA240 power amplifiers can be connected in a parallel group to provide power for loads greater than 240Watts. These connections are made using the auxiliary port. See ‘Amplifier Configuration’. -
Page 13: Amplifier Circuitry
CPA240 Configurable Power Amplifier 3.3 Amplifier Circuitry 3.3.1 Input Stage A four channel balanced input stage provides drive to the amplifier’s power stage. The gain of each channel can be adjusted via the front panel volume controls. Signal present and overload LEDs provide signal status indication for each channel. -
Page 14: Amplifier Designation & Removal Aid
CPA240 Configurable Power Amplifier 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. -
Page 15: Audio Bus Adapter
The Audio Bus Adapter provides a conversion between the two output ‘D’ type connectors on the Alpha matrix controller or V32EBPU bypass unit, and the single 40 way ribbon 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. -
Page 16: Amplifier Configuration
Channel 3. Channel 4. 4.2 Master Slave The CPA240 amplifier is equipped with four individual 60-Watt channels. Setting 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). -
Page 17: 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. -
Page 18: Fault Monitoring Settings
CPA240 Configurable Power Amplifier 4.4 Fault Monitoring Settings The amplifier provides fault indications for its power sources. • Mains • Battery (backup supply) • Changer These fault indications may be disabled by removing the appropriate link located on the D800 control card. -
Page 19: Volume Control Gain Option
The link headers are located on the D800 control card (lower front). 5.4 Linking Amplifier Frames (Parallel Group) The CPA240 provides an amplifier linking or grouping facility via additional circuitry and the auxiliary port connector. This allows a group of amplifiers to be paralleled giving increased power to a speaker circuit i.e. - Page 20 CPA240 Configurable Power Amplifier • Each amplifier within the group must be connected together via the ‘link’ feature. Page 20 of 35 21031 CPA240 manual V1.31.doc...
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Page 21: Wiring Grouped Amplifiers
CPA240 Configurable Power Amplifier 5.4.1 Wiring Grouped Amplifiers Input Wiring Each amplifier within a group should be ‘linked’ using twin-screened cable and the auxiliary port connectors. Two signal terminals (paralleled), two return terminals (paralleled) and a screen terminal are provided on the auxiliary port to allow the ‘linking’ cable to be ‘daisy chained’. -
Page 22: Amplifier Group Controller & Slave Settings
CPA240 Configurable Power Amplifier 5.4.2 Amplifier Group Controller & Slave Settings The amplifiers in a group must be configured as: • Group ‘controller’ (one only) • Group ‘slave’ Group Controller One amplifier within a group must be configured as a ‘controller’. -
Page 23: Connecting Line Outputs
CPA240 Configurable Power Amplifier 5.5 Connecting Line outputs If CPA240s are used in conjunction with the ACA100 (D805) Adaptor, line level outputs from the Alpha are not easily wired. To overcome this, a 40W IDC Termination Panel (Farnell 343-1915) can be used after the last amplifier to “break-out”... - Page 24 CPA240 Configurable Power Amplifier Where an amplifier is used for PA only (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.
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Page 25: Mains Voltage Selection
CPA240 Configurable Power Amplifier 6 Mains Voltage Selection The CPA240 amplifier is provided with a mains voltage selector. This selector allows the amplifier to produce optimum power output without the risk of over temperature shutdown due to excessive heat dissipation. -
Page 26: Fault Monitoring Features
As the CPA240 amplifier forms a major part of this path it is therefore a critical component and must be monitored. Note: If a voice alarm system is to comply with BS5839 Part 8 1998 and any other standard it must be specifically designed to achieve that end. - Page 27 CPA240 Configurable Power Amplifier 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.
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Page 28: Rack Mounting The Cpa240
Four fixing points are provided to retain the amplifiers horizontal position. However the CPA240’s weight must be supported by some means other than the aluminium front panel. This can be achieved by fixed rails such as the Audix rack runner product 570.507.006 or a sturdy shelf. -
Page 29: Liability For Defects
CPA240 Configurable Power Amplifier 9.6 Liability for Defects Liability in respect of any defect in or failure of the goods or equipment supplied or for any loss damage or injury attributed thereto is limited to replacement or repair of defective design materials or workmanship, within a period of 12 months of despatch or commissioning. -
Page 30: Safety Considerations
The Audix standby battery supply units (Models SBS241, SBS242, 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). - Page 31 CPA240 Configurable Power Amplifier The 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.
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Page 32: Safety Considerations For System Maintenance
230V mains • 100V signals The CPA240 primary supply is 230v AC 50-60Hz. This is connected by means of an IEC fused inlet. 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. -
Page 33: Maintenance
CPA240 Configurable Power Amplifier If the CPA240 is to be moved the appropriate lifting code of practice should be followed. Approximate frame weight in kilograms: 15Kg Warning: The amplifier frame is heavy! 11 Maintenance Although the CPA240 requires little or no maintenance the Public Address or Voice Alarm system to which it is installed may require regular scheduled maintenance. -
Page 34: Rear Panel Pin-Outs
CPA240 Configurable Power Amplifier 13 Rear panel pin-outs 13.1 Audio Input Bus Connector – 2 x 40 way IDC header (PCB mounted D804: PL5, PL6) Note: Signal pairs appear to be in a ‘non-standard’ configuration. This is due to the Alpha Matrix Controller connector type and orientation. -
Page 35: Fms Bus
CPA240 Configurable Power Amplifier 13.3 FMS Bus Connector – 2 x 16 way IDC header (PCB mounted D804: PL1, PL2) Function Signal (from FMS bus (To FMS) terminator) Cable monitoring daisy chain NC(IN) Cable monitoring daisy chain NO(IN) Cable monitoring daisy chain... -
Page 36: Back-Up Supply Connector Schematic
CPA240 Configurable Power Amplifier 13.5 Back-up Supply Connector Schematic A 24V DC backup supply can be connected to the amplifier frame to provide supply redundancy. The amplifier is supplied with a mating ‘free’ connector that should be wired as shown below. - Page 37 CPA240 Configurable Power Amplifier Page 37 of 35 21031 CPA240 manual V1.31.doc...
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Page 38: Electrical Schematic
CPA240 Configurable Power Amplifier 14 Electrical Schematic The following diagram shows internal connections with safety critical components and assemblies marked. Page 38 of 35 21031 CPA240 manual V1.31.doc... -
Page 39: Detailed Block Diagram
CPA240 Configurable Power Amplifier 15 Detailed Block Diagram OTNF OverTemp D804 Assy D800 Assy Heatsink D801 Assy D800 Assy D804 Assy OTAF Fault Heatsink Temp. W arning OverTemp sensor /AlphaWakeUP ITP-WakeUp Audio Link IO Ch.1 Alpha Outputs Internal Patch-Field Ch.1 Feedback Ch.1... - Page 40 CPA240 Configurable Power Amplifier APPENDIX A Amplifier Fail Disable (PA Only) Where an amplifier is used for PA only (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.
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