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aj80a ampss ? astec modular power supply system dc-dc converter module technical reference manual series highlights ? high efficiency - up to 86% ? 85 c baseplate operating temperature ? low output ripple and noise ? high reliability - over 1 million hours mtbf ? wide input voltage range economy series
rev. 03 jan 96 ampss ? reference manual table of contents 1 contents introduction ...................................................................................................... 3 special features .............................................................................................. 3 ordering information ........................................................................................ 4 safety ............................................................................................................... 4 electrical specifications .................................................... 5 absolute maximum ratings C all models ......................................................... 5 pin connections - all models ............................................................................ 6 insulation - all models....................................................................................... 7 electrical specifications for 48v input models (aj80a-048l-xxfyy) ................ 8 electrical specifications for 300v input models (aj80a-300l-xxfyy) .............. 9 functional description .................................................... 11 remote sense (+sense, -sense)............................................................... 11 enable control (enable) .............................................................................. 11 output voltage adjustment (v adj) ............................................................... 11 clock signals (clk in) ................................................................................... 12 current sharing (c share)........................................................................... 12 power good/identification (pg/id) ................................................................. 12 design considerations .................................................... 13 input bulk capacitors ..................................................................................... 13 remote loads ................................................................................................ 13 input fusing.................................................................................................... 13 parallel connection considerations ............................................................... 13 break regulation ............................................................................................ 14 conducted emi............................................................................................... 14 overtemperature protection ........................................................................... 14 thermal data ................................................................................................. 14 mtbf ............................................................................................................. 14 output ripple and noise ................................................................................ 14
aj80a economy series rev. 03 jan 96 ampss ? reference manual 2 application examples ...................................................... 15 ac input design ............................................................................................. 15 parallel connection design ............................................................................ 15 mechanical information ................................................... 17 dimensions..................................................................................................... 17 recommended pcb layout ........................................................................... 18 heatsink mounting information....................................................................... 19
rev. 03 jan 96 ampss ? reference manual introduction 3 aj80a economy series dc-dc converters introduction the aj80a is an isolated, single output dc to dc converter module, providing up to 240w output with a maximxum baseplate operating temperature of 85 c with no derating. the aj80a features adjustable output voltage and current limiting and has a baseplate operating temperature of up to 85?c. (with no derating). special features ? high efficiency - up to 86% ? 500khz fixed switching frequency ? 85 c baseplate operating temperature - no derating ? low output ripple and noise ? excellent transient response ? high reliability - over 1 million hours mtbf ? wide input voltage range ? parallelable ? current and temperature monitoring outputs ? overtemperature and short circuit protection current sensing and control pwm control and gating osc + in ?in c share enable clk in v adj pg/id ?sense + sense ?out + out 21 24 26 29 1 4 2 31 32 9 8 internal temperature sensor id resistor 6 3 primary side secondary side output detection over- voltage protection voltage sensing and control 300v modules only mosfet switcher 5 s com pg/id 2 +sense 1 3 v adj 4 ?ense clk in 8 rsv 7 c share 6 s com 5 9 enable 10 rsv 11 rsv 12 rsv + output patents pending + input 31 32 21 22 23 24 26 27 28 29 ampss tm power module
aj80a economy series rev. 03 jan 96 ampss ? reference manual 4 ordering information please contact astec for information on other output voltages, power ranges and configurations. safety ul: ul1950 csa: csa22.2-234 csa22.2-950 vde: vde 0805 en60950 please contact astec for information on specific module approvals. note: ensure all modules are used according to the installation instructions provided with each module. model number input voltage output voltage output current output power aj80a-300l-033f50 300v 3.3v 50a 165w aj80a-300l-050f40 300v 5v 40a 200w aj80a-300l-120f18 300v 12v 18a 216w aj80a-300l-150f16 300v 15v 16a 240w aj80a-048l-033f50 48v 3.3v 50a 165w aj80a-048l-050f40 48v 5v 40a 200w aj80a-048l-120f18 48v 12v 18a 216w AJ80A-048L-150F16 48v 15v 16a 240w
rev. 03 jan 96 ampss ? reference manual electrical specifications 5 electrical specifications absolute maximum ratings C all models exceeding the specified absolute maximum ratings may severely damage the module. these ratings are intended as guidelines for absolute worst case operating conditions and are not to be interpreted as recom- mended operating condition notes: * for 300v input : all isolation barriers on 300v input modules have been designed and tested to meet 4242vdc as required by iec950 for reinforced insulation. the complete module should not be subjected to a 3000vac input-to-output test because this can result in input-baseplate-output breakdown. ampss dc-dc modules are class i equipment. power supply systems using ampss modules must also be class i equipment. each ampss dc-dc module is fully tested in factory according to the standards. therefore power supply systems need only be subjected to hi-pot test for basic insulation which is 1500vac (ac) input to ground. specifications electrical characteristics are guaranteed over the full baseplate temperature range (-20 to 85?c) and for the full range of input voltage (v i ) and for the full load range (0 to i o rated). except where indicated , +sense and -sense are connected to the output terminals at the point of measurement, enable is connected to - sense. all other pins are left floating. definitions v i , v o and i o are actual operating conditions, v inom , v onom and i orated are nominal ratings. general 300v input 48vinput continuous input voltage 400v 72v input surge voltage (1 sec) 425v 75v isolation, input to output* 2700vdc 2100vdc isolation input to baseplate* 2121vdc 2100vdc isolation, output to baseplate* 500vdc 500vdc operating temperature (baseplate) -20 to 85?c storage temperature -40 to 105?c operating relative humidity (non-condensing) 10% to 95% storage relative humidity (non-condensing) 95% max altitude (operating) < 3000m altitude (storage) < 9000m lead temperature (soldering 5 seconds) 235?c primary control pins c share -0.5 to 7 vdc clk in -10 to 10 vdc ovp adj -0.5 to 7 vdc enable 0.5 to 20 vdc secondary control pins +sense v o - 0.5 to v o + 0.5 vdc -sense -0.5 to 0.5 vdc v adj -0.5 to 7 vdc pg/id 0.5 to v o + 0.5vdc note : v o = module output voltage
aj80a economy series rev. 03 jan 96 ampss ? reference manual 6 pin connections - all models input pins pin no pin name type description recommended connections 3 1 +input input power input - positive a 200 m f electrolytic capacitor connected between the +input and -input pins is recommended 3 2 -input input power input - negative (return) see + input for recommendations output pins pin no pin name type description recommended connections 21-24 +output output power output - positive ensure good electrical connection and sufficient copper on pcb layouts 26-29 -output output power output - negative see +output for recommendations pg/id 2 +sense 1 3 v adj 4 ?ense clk in 8 rsv 7 c share 6 s com 5 9 enable 10 rsv 11 rsv 12 rsv + output patents pending + input 31 32 21 22 23 24 26 27 28 29 ampss tm power module control pins pin no pin name type description recommended connections 1 +sense input used for remote sense function to compensate for load bus resistance if remote sensing is not required connect to +output pins 21-24 of the module 2 pg/id output high level output (v pg/id = v o ) indicates module converter is running. can also be used to identify the nominal output voltage of the module by measuring resistance between pg/id and +sense output impedance = v o nom x 1k w . leave unconnected if not used 3 v adj input used to adjust module output voltage leave unconnected if not used 4 -sense input used for remote sense function to compensate for load bus resistance if remote sensing is not required connect to -output pins 26-29 of the module 5 s com - negative reference for all primary side signals connect to negative side of primary control and monitoring circuitry 6 c share input/output allows modules connected in parallel to accurately share current connect to c share pins of other modules. leave unconnected if not used 7 rsv - reserved leave unconnected. 8 clk in input accepts a 1mhz clock input for synchronization with other modules capacitor coupled input. leave unconnected if not used 9 enable input enables or disables the output of the module must be connected to -sense pin or driven to <0.8v to enable the output of the module 10 rsv - reserved leave unconnected. 11 rsv - reserved leave unconnected. 12 rsv - reserved leave unconnected.
rev. 03 jan 96 ampss ? reference manual electrical specifications 7 insulation parameter conditions min typ max units input-output insulation resistance 500vdc 10 m w input-baseplate insulation resistance 500vdc 10 m w output-baseplate insulation resistance 500vdc 10 m w insulation - all models control signals parameter conditions min typ max units pg/id - power good/identification pg/id low (power fail), i sink 10ma 0.2 v function resistance, pg/id to +output 3.3 v output 3.23 3.3 4.32 k w 5v output 5.00 5.1 6.12 k w 12v output 11.76 12 13.02 k w 15v output 14.70 15 16.02 k w v adj - voltage adjust v vadj = 0v 90 %v onom v vadj = 2v 110 %v onom c share - current share function c share pins of connected together of modules operating in p arallel 5% 15 %i o ave max no. of units operating in p arallel 5 clk in - clock input voltage (square wave) 4.4 5.5 vp-p frequency 0.8 1 1.2 mhz enable - module enable module enabled 0 0.8 v module disabled 2 10 v
aj80a economy series rev. 03 jan 96 ampss ? reference manual 8 electrical specifications for 48v input models (aj80a-048l-xxfyy) input characteristics parameter conditions min typ max units input voltage 36 48 72 v input surge voltage (1 second) 75 v input low line power on voltage module power on 27 35 v input low line power off voltage module shutdown 50 80 %v ion no load input power v i = v inom 10 w input capacitance 2.5 m f transient characteristics parameter conditions min typ max units turn-on time 100 1000 msec transient response (25% to 75% load change @ 0.1a/ m s, recovery to 1% v o ) step-load excursion 10 %v o step-load response 100 m s output characteristics parameter conditions min typ max units nominal (factory set) output voltage aj80a-048l-033f50 3.3 v aj80a-048l-050f40 5.0 v aj80a-048l-120f18 12.0 v AJ80A-048L-150F16 15.0 v output voltage set point accuracy t c = +25?c, v i = v inom , i o = i orated -1 1 %v onom remote sense compensation 1 v i = v imin 0.5 v output voltage adjust 30 110 %v onom nominal (factory set) output overvolta g e p rotection tri p p oint 120 130 140 %v onom line regulation v imin to v imax 0.2 %v onom load regulation i omin to i omax 0.5 %v onom noise and ripple 20mhz bandwidth 3 %v onom output current aj80a-048l-033f50 0 50 a aj80a-048l-050f40 0 40 a aj80a-048l-120f18 0 18 a AJ80A-048L-150F16 0 16 a output current limit v o dropped to 90% of v onom 105 115 125 %i orated short circuit current 105 125 %i orated temperature coefficient per ?c baseplate temperature 0.02 %v o /?c overtemperature shutdown baseplate temperature 87 110 ?c efficiency v o = v onom , i o = i onom , i o = i orated aj80a-048l-033f50 72 74 % aj80a-048l-050f40 78 80 % aj80a-048l-120f18 83 84 % AJ80A-048L-150F16 84 85 %
rev. 03 jan 96 ampss ? reference manual electrical specifications 9 electrical specifications for 300v input models (aj80a-300l-xxfyy) input characteristics parameter conditions min typ max units input voltage 180 300 400 v input surge voltage (1 second) 425 v input low line power on voltage module power on 140 175 v input low line power off voltage module shutdown 50 80 %v ion no load input power v i = v inom 10 w input capacitance 0.5 m f transient characteristics parameter conditions min typ max units turn-on time 100 1000 msec transient response (25% to 75% load change @ 0.1a/ m s, recovery to 1% v o ) step-load excursion 10 %v o step-load response 300 m s output characteristics parameter conditions min typ max units nominal (factory set) output voltage aj80a-300l-033f50 3.3 v aj80a-300l-050f40 5.0 v aj80a-300l-120f18 12.0 v aj80a-300l-150f16 15.0 v output voltage set point accuracy t c = +25?c, v i = v inom , i o = i orated -1 1 %v onom remote sense compensation 1 v i = v imin 0.5 v output voltage adjust 90 110 %v onom nominal (factory set) output overvolta g e p rotection tri p p oint 120 130 140 %v onom line regulation v imin to v imax 0.2 %v onom load regulation i omin to i omax 0.5 %v onom noise and ripple 20mhz bandwidth 3 %v onom output current aj80a-300l-033f50 0 50 a aj80a-300l-050f40 0 40 a aj80a-300l-120f18 0 18 a aj80a-300l-150f16 0 16 a output current limit v o dropped to 90% of v onom 105 115 125 %i orated short circuit current 105 125 %i orated temperature coefficient per ?c baseplate temperature 0.02 %v o /?c overtemperature shutdown baseplate temperature 87 110 ?c efficiency v o = v onom , i o = i onom , i o = i orated aj80a-300l-033f50 76 78 % aj80a-300l-050f40 79 81 % aj80a-300l-120f18 84 86 % aj80a-300l-150f16 85 87 % notes : 1. the de-rating of output current is -0.123a/?c for baseplate temperatures higher than 55?c. maximum output current at 85?c baseplate is 6.3a
rev. 03 jan 96 ampss ? reference manual functional description 11 functional description this section explains the how to implement the functions found on the aj80a economy series. remote sense (+sense, -sense) connect the +sense and -sense pins directly to the load to allow the module to compensate for the voltage drop across the conductors carrying the load current. if remote sensing is not required (for exam- ple if the load is close to the module) the sense pins should be connected directly to the modules output pins to ensure accurate regulation. note: if the sense leads fail open circuit, the module will revert to local sense at the output pins. if the sense leads are reversed, the module will latch off via the ovp. load + sense ?sense + o/p ?o/p 1 4 3 2 0.5v max voltage at load module output voltage load current volts enable control (enable) the enable pin is a ttl compatible input used to turn the output of the module on or off. the module output is enabled when the enable pin is con- nected to s com or driven to a logic low of <0.8v (but not negative) with respect to s com. the output is disabled when the enable pin is open or driven to a logic high >2v with respect to s com. if the aj80a is operated in parallel, all enable pins must be connected in parallel to ensure all modules are enabled simultaneously. + i/p ?i/p 9 8 12 5 + i/p ?i/p 9 8 12 5 output voltage adjustment (v adj) the output voltage of the module may be accurately adjusted by up to 10% of the nominal factory set output. adjustment is carried out using a 1k w trim- ming potentiometer connected as indicated. ?sense + sense 1 4 +o/p ?/p 3 2 r pot = 1k r ext model no value of rext aj80a-xxxl-033f50 0 aj80a-xxxl-050f40 0 aj80a-xxxl-120f18 1.1 k aj80a-xxxl-150f16 1.5 k 0 20406080100 80 100 120 % r pot v out (% of v o ) voltage adjust characteristic
aj80a economy series rev. 03 jan 96 ampss ? reference manual 12 power good/identification (pg/id) this pin provides an indication that the module's converter is working, and can also be used to identify the factory set output voltage of the module. the pg/id pin goes high to the level of the output voltage (v o ) to indicate that the module is operating and delivering power. the output goes low if the converter stops operating due to a fault such as an overtemperature or overvoltage condition. the pg/id pin will also go low if the module is disabled via the enable pin. the resistance between the pg/id pin and the +ve output of the module can be used to determine the output voltage of the module with no power applied according to the table shown: + sense ?sense + o/p ?o/p 1 4 3 2 power good example applies for 5v output only output voltage (v) resistance (k w ) 3.3 3.3 5 5.1 12 12 15 15 clock signals (clk in) the module's internal clock is accurate and stable over its full operating range and synchronization is not normally required, but it can reduce noise in paralleled systems. an external clock signal of 3.5 to 5vpk-pk at 1mhz 10% can be connected to the clk in pins of all the modules. if the clock input to any module fails, the module will automatically switch back to its internal clock and will continue to operate at full power even in current sharing systems. the clk in signal is ac coupled. + i/p ?i/p 9 8 12 5 external clock 3.5 to 5.5vp-p @ 1mhz 10% clk in + i/p ?i/p 9 8 12 5 clk in current sharing (c share) to ensure that all modules in a parallel system accurately share current, the c share and s com pins on each module should be connected together as shown. the enable pins of each of the modules should be connected either directly to s com or to a common enable control to ensure that all modules are enabled simultaneously. after the module is enabled, the c share for the module becomes active. only when all c share signals are active will power be deliv- ered to the load. + sense ?sense + o/p ?o/p 1 4 3 2 + sense ?sense + o/p ?o/p 1 4 3 2 + i/p ?i/p 9 8 12 5 to c share of next module + i/p ?i/p 9 8 12 5 to enable of next module to s com of next module from c share of previous module from enable of previous module from s com of previous module
rev. 03 jan 96 ampss ? reference manual design considerations 13 design considerations remote loads if the sensed load is some distance from the module, the module's output voltage may rise sufficiently to trigger the ovp protection circuit during a step load change due to bus inductance. fitting a decoupling capacitor at the load can reduce this effect. it should be noted that a distributed power solution, using ampss tm modules placed close to their loads, will optimize transient response. + sense ?sense 1 4 3 2 + o/p ?o/p load + + i/p ?i/p 220 f v i input fusing ampss modules do not have an in-line fuse fitted internally. in order to comply with csa, vde and ul safety regulations it is recommended that a fuse of the following rating be fitted at the module's input. input bulk capacitors electrolytic bulk reservoir capacitors placed close to the module input pins are recommended to ensure the module is fed with a low source impedance. for the aj80a economy series module typical values are 220 m f/100v for 48v modules and 220 m f/450v for 300v modules. parallel connection considerations a master-slave configuration is not required for ampss tm modules. aj80a modules may be con- nected in parallel using a simple wiring scheme. current sharing in multi-module paralleled systems, all modules will share current to within 5% (typical) of the average load current per module when the c share pins of each module are connected together. the +sense and -sense pins of each module should be con- nected to common points as close as possible to the load. note: after a module is enabled the c share becomes active. only when all c share signals are active will power be delivered to the load. for this reason the aj80a series is unsuitable for hot pluggable or redundancy systems. input fuse rating 300v 5a / 250v 48v 10a / 250v load + sense ?sense c share 8 1 4 + sense ?sense c share 5 + o/p ?o/p 3 2 9 12 1 4 5 3 2 12 8 9 s com s com enable enable common enable
aj80a economy series rev. 03 jan 96 ampss ? reference manual 14 overtemperature protection if the module's internal temperature exceeds 95 c, the module will latch off. to reset the module the input supply must be cycled off and then on again, allowing a period of time for the module to cool down. overtemperature shutdown can also be programmed to occur at lower temperatures by using the temp mon output to control the enable pin. break regulation aj80a economy series modules are designed to deliver full rated output current at up to 0.5v above v o nom at the minimum specified input voltage. 90% 100% 110% 36 40 72 %v o nom + 0.5v v i (48v input modules) 90% 100% 110% 180 200 400 %v o nom + 0.5v v i (300v input modules) typical typical mtbf predicted mtbf for the aj80a economy series is greater than 1,000,000 hours at maximum rated output and 50 c baseplate temperature. conducted emi although ampss tm modules contain both common mode and differential mode input emi filtering, power supply systems using these modules will require additional emi filtering to enable the system to meet relevant emi standards. aj80a modules have an effective input to ground (baseplate) capacitance of 440pf for the 300v input models and 520pf for the 48v input models. this should be accounted for when calculating the maxi- mum emi y capacitance to meet ground leakage current specifications. 9 8 12 5 + i/p ?i/p + protective earth baseplate output ripple and noise aj80a economy series modules are designed to generate very low ripple and noise. when mounted on logic boards, for example, sufficient decoupling is normally provided by the components used to decouple the logic ics, and no additional decoupling is required. thermal data natural convection thermal impedance of the aj80a package without a heatsink is approximately 4 c/w. a standard horizontal fin heatsink available from astec (part number apa501-80-002) with 11mm fins and 8mm pitch, will reduce module thermal imped- ance to 1 c /w with a forced air flow of 250 lfm when mounted with a thermal pad (astec p/n apa502-80-001) between heatsink and module. forced convection for apa501-80-002 at 200w output 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 900 1000 vair (lfm) thermal resistance baseplate to ambient ( c/w)
rev. 03 jan 96 ampss ? reference manual application examples 15 application examples ac input design load + sense ?sense + o/p ?o/p + i/p ?i/p 9 8 1 4 output voltage adjust enable (close to enable) 3 2 12 5 l n e 220vac + protective earth + + vdc in + + sense ?sense + o/p ?o/p + i/p ?i/p 9 8 1 4 3 2 12 5 + sense ?sense + o/p ?o/p + i/p ?i/p 9 8 1 4 3 2 12 5 load c share c share s com s com enable input enable enable parallel connection design
rev. 03 jan 96 ampss ? reference manual mechanical information 17 mechanical information dimensions the dimensions are given in mm (inches). note that the baseplate must be connected to protective earth before power is supplied to the module. base plate (connect to protective earth) 4 control pins ?.64, 2.54 grid 0.05 (?.025, 0.1 grid 0.002) 8 control pins ?.64, 2.54 grid 0.05 (?.025, 0.1 grid 0.002) 2 input pins ?.52 (0.060) 0.05 (0.002) 8 output pins ?.52 (0.060) 0.05 (0.002) 116.8 (4.60) 61.0 (2.40) 29 28 27 26 24 23 22 21 32 31 12.7 (0.50) 106.68 (4.200) 50.80 (2.000) 22.86 (0.900) 3.81 (0.150) typ 7.62 (0.300) 15.24 (0.600) 7.5 (0.30) typ 5.1 (0.20) typ 4.1 (0.16) typ notes: 1. all dimensions in mm and (inches) 2. baseplate must be connected to protective earth 3. general tolerance: .x 0.5 (0.02) .xx 0.25 (0.010) ?.81 (0.150) r3.8 (0.15) typ 10.16 (0.400) 4 1 2 3 5 8 912
aj80a economy series rev. 03 jan 96 ampss ? reference manual 18 recommended pcb layout the aj80a economy series module may be mounted to a board either by soldering or by using spring sockets. materials : control pins are gold plated phospher-bronze. input and output pins are tin plated copper. hole size for pcb direct soldering hole size for spring socket mounting* hole size for m3.5 machine screw *spring sockets are available from astec in packs of 20 control pin sockets and 15 power pin sockets, part no. apa504-00-001. sockets are not suitable for output current greater than 10a per pin. a ?.5 +0.08 / -0 (?.177 +0.0031 / -0) for m3.5 b ?.00+0.15 / -0 (?.079 +0.006 / -0) ?.67 0.05 (?.105 0.002) c ?.00 +0.15 / -0 (?.039 +0.006 / -0) ?.37 0.05 (?.054 0.002) recommended hole size table : 21 4 1 29 2 3 32 31 50.80 (2.000) 22.86 (0.900) 106.68 (4.200) 15.24 (0.600) 3.81 (0.150) typ 7.62 (0.300) 2.54 (0.100) c a b 2.54 grid 0.05 (0.10 grid 0.002) view from pcb component side notes: 1. pcb component side view is shown. 2. all dimensions in mm and (inches). 3. general tolerance : .xx 0.1 (0.006). 5 8 912 10.16 (0.400)
rev. 03 jan 96 ampss ? reference manual mechanical information 19 heatsink mounting information heatsinks for ampss tm modules are available in a variety of sizes and fin orientation. mounting kits and thermal pads are also available. the table below shows the options available for aj80a economy series. a heatsink mounting kit provides the most conven- ient way to mount the heatsink to the module and then mount the assembly onto a circuit board ampss tm modules may be retained by their input and output pins only, or may be fixed to the board using bolts screwed into the tapped studs which are provided as part of the mounting kit. in both cases the studs provide clearance between the module and the circuit board to facilitate pcb cleaning opera- tions. note: baseplate and heatsink must be connected to protective earth description model number dimensions free air therma l inches mm resistance heatsink, "80" size, vertical fin. apa501-80-001 4.5x2.3x0.6 115x59x15 2.7?c/w heatsink, "80" size, horizontal fin apa501-80-002 4.5x2.3x0.6 115x59x15 2.4?c/w heatsink, "80" size, vertical fin. apa501-80-003 4.5x2.3x0.9 115x59x24 2.2?c/w heatsink, "80" size, horizontal fin apa501-80-004 4.5x2.3x0.9 115x59x24 2.0?c/w heatsink, "80" size, vertical fin. apa501-80-005 4.5x2.3x1.5 115x59x37 2.0?c/w heatsink, "80" size, horizontal fin apa501-80-006 4.5x2.3x1.5 115x59x37 1.7?c/w heatsink, "80" size, low profile apa501-80-007 4.6x3.5x0.5 115.6x89x12 2.0?c/w thermal pad, "80" size apa502-80-001 mounting kit, tapped studs apa503-00-001 mounting kit, solder studs apa503-00-002 mounting kit, tapped studs apa503-00-007 for low profile heatsink mounting kit, solder studs apa503-00-008 for low profile heatsink spring sockets (20 cont. 15pwr) apa504-00-001 1 2
europe astec europe ltd. astec house, waterfront bus. park merry hill, dudley west midlands dy5 1lx u.k. tel : 44-1384-842211 fax : 44-1384-843355 north america astec america, inc . 58 10 va n al len w ay carlsbad , ca 9200 8 usa tel : 760- 930 -4 600 fax : 760-930-4700 for further information contact : asia astec asia 6f., china dyeing works building 382-392 castle peak road tsuen wan n.t. hong kong tel : 852-2437-9662 fax : 852-2402-4426 apa701-vrm rev. 04 may 97

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