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qs20.481 q-series 48v, 10a, s ingle p hase i nput p ower s upply ? ac 100-240v wide-range input ? width only 82mm ? efficiency up to 94.3% ? 150% (720w) peak load capability ? safe hiccup plus overload mode ? easy fuse tripping due to high overload current ? active power factor correction (pfc) ? negligible low inrush current surge ? short-term operation down to 60vac and up to 300vac ? full power between -25c and +60c ? dc-ok relay contact ? quick-connect spring-clamp terminals ? 3 year warranty 1/25 g eneral d escription the most outstanding features of this dimension q- series din-rail power supply are the high efficiency and the small size, which are achieved by a synchronous rectification and further novel design details. with short-term peak power capability of 150% and built-in large sized output ca pacitors, these features help start motors, charge ca pacitors and absorb reverse energy and often allow a unit of a lower wattage class to be used. high immunity to transients a nd power surges as well as low electromagnetic emission makes usage in nearly every environment possible. the integrated output power manager, a wide range input voltage design and virtually no input inrush current make installation and usage simple. diagnostics are easy due to the dry dc-o k contact, a green dc-ok led and red overload led. unique quick-connect spri ng-clamp terminals allow a safe and fast installation a nd a large international approval package for a variety of applications makes this unit suitable for nearly every situation. s hort - form d ata output voltage dc 48v adjustment range 48 - 55v output current 10 C 8.7a continuous 15 C 13.1a for typ. 4s output power 480w continuous 720w for typ. 4s output ripple < 100mvpp 20hz to 20mhz input voltage ac 100-240v 15% mains frequency 50-60hz 6% ac input current 4.56 / 2.48a at 120 / 230vac power factor 0.95 / 0.90 at 120 / 230vac ac inrush current typ. 9 / 7a peak at 120 / 230vac efficiency 92.8 / 94.3% at 120 / 230vac losses 37.2 / 29.0w at 120 / 230vac temperature range -25c to +70c operational derating 12w/c +60 to +70c hold-up time typ. 32 / 51ms at 120 / 230vac dimensions 82x124x127mm wxhxd o rder n umbers power supply qs20.481 48-55v standard unit accessory zm2.wall wall mount bracket zm15.side side mount bracket yr40.482 redundancy module m arkings ind. cont. e q. ul 508 ul 60950-1 marine class i div 2 emc, lvd, rohs oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qs20.481 q-series 48v, 10a, s ingle p hase i nput i ndex page page 1. intended use .......................................................3 2. installation requirements ...................................3 3. ac-input ...............................................................4 4. dc-input ...............................................................5 5. input inrush current ...........................................5 6. output .................................................................6 7. hold-up time .......................................................8 8. dc-ok relay contact ..........................................8 9. efficiency and power losses ................................9 10. lifetime expectancy and mtbf .........................10 11. functional diagram ...........................................10 12. terminals and wiring ........................................11 13. front side and user elements ...........................12 14. emc ....................................................................13 15. environment ......................................................14 16. protection features ...........................................15 17. safety features ..................................................15 18. dielectric strength ............................................16 19. approvals ...........................................................16 20. physical dimensions and weight ......................17 21. accessories ........................................................ 18 21.1. zm2.wall wall mounting bracket .......18 21.2. zm15.side side mounting bracket ........18 21.3. yr40.482 redundancy modules ............19 22. application notes ............................................. 20 22.1. repetitive pulse loading ..........................20 22.2. peak current capability ...........................21 22.3. back-feeding loads ..................................21 22.4. external input protection .........................21 22.5. charging of batteries ...............................22 22.6. output circuit breakers ............................22 22.7. parallel use to increase output power ....23 22.8. parallel use for redundancy ....................23 22.9. series operation .......................................24 22.10. inductive and capacitive loads ................24 22.11. operation on two phases ........................24 22.12. use in a tightly sealed enclosure ............24 22.13. mounting orientations ............................25 the information presented in this docume nt is believed to be a ccurate and reliable and ma y change without notice. no part of this document may be reproduc ed or utilized in any form without pe rmission in writing from the publisher. t erminology and a breviations pe and symbol pe is the abbreviation for p rotective e arth and has the same meaning as the symbol . earth, ground this document uses the term earth which is the same as the u.s. term ground. t.b.d. to be defined, value or de scription will follow later. ac 230v a figure displayed with the ac or dc before the value represents a nominal voltage with standard tolerances (usually 15%) included. e.g.: dc 12v describes a 12v battery disregardi ng whether it is full (13.7v) or flat (10v) 230vac a figure with the unit (vac) at the end is a momentary figure without any additional tolerances included. 50hz vs. 60hz as long as not otherwise stated, ac 230v parameters are valid at 50hz mains frequency. may a key word indicating flexibility of choice with no im plied preference. shall a key word indicating a mandatory requirement. should a key word indicating flexibility of choi ce with a strongly pref erred implementation. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 2/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 1. i ntended u se this device is designed for installation in an enclosure and is intended for th e general use such as in industrial control, office, communication, and instrumentation equipment. do not use this power supply in equipment, where malfuncti on may cause severe personal injury or threaten human life. this device is designed for use in hazardous, non-hazardous, ordinary or un classified locations. 2. i nstallation r equirements this device may only be installed and put into opera tion by qualified personnel. this device does not contain serviceable parts. the tripping of an internal fuse is caused by an internal defect. if damage or malfuncti on should occur during installation or operation, i mmediately turn power off and send unit to the factory for inspection. mount the unit on a din-rail so that the output terminals are located on the top and the input terminals are located on the bottom of the unit. for other mounting orientations see de-rating requirements in this document. see chapter 22.13. this device is designed for convection cooling and does not require an external fan. do not obstruct airflow and do not cover ventilation grid (e.g. cable conduits) by more than 30%! keep the following installation clearance s: 40mm on top, 20mm on the bottom, 5mm on the left and right sides are recommended when the device is loaded permanently with more than 50% of th e rated power. increase this clearance to 15mm in case the adjacent device is a heat source (e.g. another power supply). a disconnecting means shall be provided for the output of the power supplies when used in applications according to csa c22.2 no 107.1-01. warning risk of electrical shock, fi re, personal injury or death. - do not use the power supply without proper grounding (protective earth). us e the terminal on the input block for earth connection and not one of the screws on the housing. - turn power off before working on the devi ce. protect against inad vertent re-powering. - make sure that the wiring is correct by following all local and national codes. - do not modify or repair the unit. - do not open the unit as high voltages are present inside. - use caution to prevent any foreign objects from enteri ng the housing. - do not use in wet locations or in areas wh ere moisture or condens ation can be expected. - do not touch during power-on, and immediatel y after power-off. hot surfaces may cause burns. notes for use in hazardous location areas: the power supply is suitable for use in cla ss i division 2 groups a, b, c, d locations. warning explosion hazards! substitution of components may impair su itability for this environment. do not disconnect the unit or operate the voltage adjustment unless power has been switched off or the area is known to be non-hazardous. a suitable enclosure must be provided for the end product which has a mini mum protection of ip54 and fulfils the requirements of the en 60079-15. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 3/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 3. ac-i nput ac input nom. ac 100-240v suitable fo r tn-, tt- and it mains networks ac input range min. 85-276vac continuous operation min. 60-85vac full power for 200ms, no damage between 0 and 85vac min. 276-300vac < 500ms allowed voltage l or n to earth max. 276vac continuous, iec 62103 input frequency nom. 50C60hz 6% turn-on voltage typ. 77vac steady-state value, see fig. 3-1 shut-down voltage typ. 73vac steady-state value, see fig. 3-1 typ. 53vac dynamic value ac 100v ac 120v ac 230v input current typ. 5.47a 4. 56a 2.48a at 48v, 10a, see fig. 3-3 power factor *) typ. 0.96 0.95 0.90 at 48v, 10a, see fig. 3-4 crest factor **) typ. 1.6 1.7 2.05 at 48v, 10a start-up delay typ. 640ms 610ms 660ms see fig. 3-2 rise time typ. 80ms 80ms 80ms 0mf, 48v, 10a, see fig. 3-2 typ. 100ms 100ms 100ms 10mf, 48v, 10a, see fig. 3-2 turn-on overshoot max. 100mv 100mv 100mv see fig. 3-2 *) the power factor is the ratio of the true (or real) power to the apparent power in an ac circuit. **) the crest factor is the mathematical ratio of the peak value to rms value of the input current waveform. fig. 3-1 input voltage range fig. 3-2 turn-on behavior, definitions turn-on 85v rated input range max. 500ms v in p out 60v 300vac 276v shut-down full power for 200ms start-up delay rise time overshoot - 5% output voltage input voltage fig. 3-3 input current vs. output load at 48v fig. 3-4 power factor vs. output load 10a 123456789 0 1 2 3 4 5 6a output current input current, typ. 2 3 0 v a c 1 2 0 v a c 1 0 0 va c power factor, typ. 12345678910a 0.75 0.8 0.85 0.9 0.95 1.0 output current 230vac 100vac 120vac oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 4/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 4. dc-i nput dc input nom. dc 110-150v -20%/+25% dc input range min. 88-187vdc dc input current typ. 4.6a 110vdc, at 48v, 10a allowed voltage l/n to earth max. 375vdc iec 62103 turn-on voltage typ. 74vdc steady state value shut-down voltage typ. 69vdc steady state value fig. 4-1 wiring for dc input instructions for dc use: + - load l pe + - power supply ac dc battery n a) use a battery or si milar dc source. for other sources contact puls b) connect +pole to l and Cpole to n. c) connect the pe terminal to an earth wire or to the machine ground. 5. i nput i nrush c urrent an active inrush limitation circuit limi ts the input inrush current after turn-on of the input voltage and after short input voltage interruptions. the charging current into emi suppression capacitors is disregarded in th e first microseconds after switch-on. ac 100v ac 120v ac 230v inrush current max. 13a peak 13a peak 13a peak over entire temperature range; mains interruptions > 750ms typ. 11a peak 9a peak 7a peak over entire temperature range; mains interruptions > 750ms inrush energy max. 5a 2 s 5a 2 s 5a 2 s over entire temperature range; mains interruptions > 750ms inrush delay (a) typ. 400ms 400ms 650ms see (a) in fig. 5-1 fig. 5-1 input inrush current, typical behavior input current input voltage output voltage a a. inrush delay input: 230vac output: 48v, 10a ambient: 25c upper curve: input current 5a / div middle curve: input voltage 500v / div lower curve: output voltage 40v / div time basis: 100ms / div oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 5/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 6. o utput output voltage nom. 48v adjustment range min. 48-55v guaranteed max. 59v ****) at clockwise end position of potentiometer factory setting typ. 48.0v 0.2%, at full load, cold unit line regulation max. 10mv 60-300vac load regulation max. 100mv static value, 0a ? 10a ripple and noise voltage max. 100mvpp 20hz to 20mhz, 50ohm output current nom. 10a contin uously available at 48v, see fig. 6-1 nom. 8.7a continuously available at 55v, see fig. 6-1 nom. 15a *) short term available bonuspower ? *) , at 48v, for typical 4s, see fig. 6-1 nom. 13.1a *) short term available bonuspower ? *) , at 55v, for typical 4s, see fig. 6-1 output power nom. 480w c ontinuously available nom. 720w *) short term available bonuspower ? *) bonuspower ? time typ. 4s duration until the output voltage dips, see fig. 6-2 min. 3.5s max. 4.5s bonuspower ? recovery time typ. 7s overload free time to reset power manager fig. 6-4 overload behaviour cont. curre nt output voltage > 40vdc, see fig. 6-1 hiccup plus mode **) output voltage < 40vdc, see fig. 6-1 short-circuit cu rrent min. 15a ***) load impedance 100mohm, see fig. 6-3 max. 20a ***) load impedance 100mohm, see fig. 6-3 max. 7a ***) average (r.m.s.) current, load impedance <10mohm, see fig. 6-3 output capacitance typ. 3 100f included inside the power supply *) bonuspower?, short term power capability (up to typ. 4s) the power supply is designed to support loads with a higher short-term power requirement without damage or shutdown. the short- term duration is hardware controlled by an output power manager. this bonuspower ? is repeatedly available. detailed information can be found in chapter 22.1 . if the power supply is loaded longer with the bonuspower ? than shown in the bonus-time diagram (see fig. 6-2 ), the max. output power is automatically reduced to 480w. if the power requirement is continuously above 480w and the voltage falls below approx. 40v (due to the current regulating mode at overload), the unit shuts-off and makes periodical resta rt attempts. this behaviour is called hiccup mode, which is descri bed below. if the voltage is above 40v, the unit continuously de livers current. **) hiccup plus mode at heavy overloads (when output voltage falls below 40v), the power supply delivers continuous output current for 2s. after thi s, the output is switched off for approx. 17s before a new start attempt is automatically performed. this cycle is repeated as long as the overload exists. if the overload has been cleared, the device will operate normally. see also fig. 6-3 . during the off-period a small rest voltage and rest current is present on the output. ***) discharge current of output capacitors is not included. ****) this is the maximum output voltage which can occur at the clockwise end position of the potentiometer due to tolerances. it is not guaranteed value which can be achieved. the typical value is about 56.5v. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 6/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput peak current capability (up to several milliseconds) the power supply can deliver a peak curren t which is higher than th e specified short term current. this helps to start current demanding loads or to safely operate subsequent circuit breakers. the extra current is supplied by the out put capacitors inside the power supply. during this event, the capacitors will be discharged and causes a voltage dip on the out put. detailed curves can be found in chapter 22.2 . peak current voltage dips typ. from 48v to 39v at 20a for 50ms, resistive load typ. from 48v to 34v at 50a for 2ms, resistive load typ. from 48v to 32v at 50a for 5ms, resistive load fig. 6-1 output voltage vs. output current, typ. fig. 6-2 bonus time vs. output power output voltage 0 0 2.5 5 10 12.5 8 16 24 56v 32 40 48 20a 7.5 15 output current 17.5 a b a b short term <5s then auto switching to curve + below 40vdc hiccup mode c c continuously available b c 0 528w 576w 624w 672w 720w 768 w 1 2 3 7 4 5 6 8 9 10s output power m i n m a x typ fig. 6-3 short-circuit on output, hiccup mode (typ.) fig. 6-4 bonuspower ? recovery time output current 0 20a 17s 17s 17s 2s 2s 2s t s t a r t o f s h o r t c i r c u i t e n d o f s h o r t c i r c u i t power demand 100% t t limitation by power manager output voltage bonus power disabled bonus time recovery time the bonuspower ? is available as soon as power co mes on and immediately after the end of an output short circuit or output overload. fig. 6-5 bonuspower ? after input turn-on fig. 6-6 bonuspower ? after output short 100% output voltage input voltage bonus power output power 150% short of output 100% output voltage bonus power output power 150% oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 7/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 7. h old - up t ime ac 100v ac 120v ac 230v hold-up time typ. 64ms 64ms 99ms at 48v, 5a, see fig. 7-1 typ. 32ms 32ms 51ms at 48v, 10a, see fig. 7-1 fig. 7-1 hold-up time vs. input voltage fig. 7-2 shut-down behavior, definitions 10 20 30 40 50 100ms 85 120 155 190 230vac input voltage 4 8 v , 1 0 a , m i n . 60 70 80 hold-up time 90 4 8 v , 1 0 a , t y p . 4 8 v , 5 a, m i n . 4 8 v , 5 a , t yp . - 5% hold-up time zero transition output voltage input voltage 8. dc-ok r elay c ontact this feature monitors the output voltage, which is produced by the power suppl y itself. it is indepe ndent of a back-fed voltage from a unit connected in parallel to the power supply output. contact closes as soon as the output voltag e reaches the adjusted output voltage level. contact opens as soon as the output voltage dips more than 10% belo w the adjusted output voltage. short dips will be extended to a signal length of 250ms. dips shorter th an 1ms will be ignored. contact re-closes as soon as the output volt age exceeds 90% of th e adjusted voltage. contact ratings max 60vdc 0.3a, 30vdc 1a, 30vac 0.5a resistive load min 1ma at 5vdc mi n. permissible load isolation voltage see dielec tric strength table in section 18. fig. 8-1 dc-ok relay contact behavior 250ms 0.9* v adj < 1ms 10% open v out = v adj open closed closed > 1ms note: the dc-ok feature requires that the output voltage reaches the nominal (=adjusted) level after turn-on in order to function acc ording to specification. if th is level cannot be achieved, the overload lamp will be on and th e dc-ok contact will be open. the overlo ad signal will only shut off as soon as the adjusted vo ltage is reached. this is an important conditi on to consider particularly, if the load is a battery, the power supply is used in parallel or the power supply is used for n+1 redundant systems. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 8/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 9. e fficiency and p ower l osses ac 100v ac 120v ac 230v efficiency typ. 92.0% 92.8% 94.3% at 48v, 10a average efficiency *) typ. 91.7% 92.4% 93.4% 25% at 2.5a, 25% at 5a, 25% at 7.5a. 25% at 10a power losses typ. 9.0w 9.2w 10.0w at 48v, 0a typ. 41.7w 37.2w 29.0w at 48v, 10a *) the average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25% of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100% of the nominal load for the rest of the time. fig. 9-1 efficiency vs. output current at 48v, typ fig. 9-2 losses vs. output current at 48v, typ. efficiency 2345678910 a 87 88 89 90 91 92 93 94 95% 1 2 0 v a c 1 0 0 v a c 230vac output current power losses 01234567 10a 10 5 20 25 30 40 45w 120vac 100vac 230vac 89 35 15 output current fig. 9-3 efficiency vs. input voltage at 48v, 10a, typ. fig. 9-4 losses vs. input voltage at 48v, 10a, typ. efficiency 85 120 155 190 225 260vac 89 90 91 92 93 94 95% input voltage power losses 20 25 30 35 40 45 50w 85 120 155 190 225 260vac input voltage oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 9/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 10. l ifetime e xpectancy and mtbf ac 100v ac 120v ac 230v lifetime expectancy *) 49 000h 63 000h 92 000h at 48v, 10a and 40c 119 000h 178 000h 147 000h at 48v, 5a and 40c 138 000h *) 165 000h *) 259 000h *) at 48v, 10a and 25c mtbf **) sn 29500, iec 61709 407 000h 441 000h 469 000h at 48v, 10a and 40c 749 000h 799 000h 840 000h at 48v, 10a and 25c mtbf **) mil hdbk 217f 204 000h 215 000h 229 000h at 48v, 10a and 40c; ground benign gb40 273 000h 288 000h 308 000h at 48v, 10a and 25c; ground benign gb25 *) the lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime expectancy of the built-in electrolytic capacitors. lifetime expectancy is specified in operational hours and is calculated acc ording to the capacitors manufacturer specification. the manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years (131 400h). any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices. **) mtbf stands for m ean t ime b etween f ailure, which is calculated according to statistical device failures, and indicates reliability of a device. it is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product. the mtbf figure is a statistical representation of the likelihood of a device to fail. a mtbf figure of e.g. 1 000 000h means that statistically one unit will fail ev ery 100 hours if 10 000 units ar e installed in the field. how ever, it can not be determined if the failed unit has been running for 50 000h or only for 100h. 11. f unctional d iagram fig. 11-1 functional diagram + + - - output over- voltage protection pfc converter output voltage regulator power converter output filter dc-ok relay output voltage monitor output power manager temper- ature shut- down input fuse input filter input rectifier active inrush limiter v out l n dc-ok contact overload led dc-ok led oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 10/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 12. t erminals and w iring bi-stable, quick-connect spring clamp te rminals. shipped in open position. - ip20 finger safe construction. - suitable for field- and factory installation. input output dc-ok-signal type spring-clamp terminals spring-clamp terminals spring-clamp terminals solid wire 0.5-6mm 2 0.5-6mm 2 0.3-4mm 2 stranded wire 0.5-4mm 2 0.5-4mm 2 0.3-2.5mm 2 american wire gauge 20-10 awg 20-10 awg 26-12 awg wire stripping length 10mm / 0.4inch 10mm / 0.4inch 6mm / 0.25inch max. wire diameter (including ferrules) 2.8mm 2.8mm 2.25mm fig. 12-1 connecting a wire instructions: a) use appropriate copper cables that are designed for minimum operating temperatures of: 60c for ambient up to 45c and 75c for ambient up to 60c minimum 90c for ambient up to 70c minimum. b) follow national installation c odes and installation regulations! c) ensure that all strands of a stranded wire enter the terminal connection! d) do not use the unit without pe connection. e) unused terminal compartments should be securely tightened. f) ferrules are allowed. 1. insert the wire 2. close the lever to disconnect wire: reverse the procedure daisy chaining of outputs: daisy chaining (jumping from one power s upply output to the next) is allowed as long as the average output current through one terminal pin does not exceed 25a. if the current is higher, use a separate distribution terminal block as shown in fig. 12-3 . fig. 12-2 daisy chaining of outputs fig. 12-3 using distribution terminals power supply + + - - input output load + - max 25a! power supply + + - - input output load + - distribution terminals power supply + + - - input output power supply + + - - input output oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 11/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 13. f ront s ide and u ser e lements fig. 13-1 front side a input terminals (quick-connect spri ng-clamp terminals) n, l line input pe (protective earth) input b output terminals (quick-connect spring-cla mp terminals, two pins per pole) + positive output C ne gative (return) output c dc-ok relay contact (quick-connect sp ring-clamp terminals) the dc-ok relay contact is sync hronized with the dc-ok led. see chapter 8 for details. d output voltage potentiometer open the flap to adjust the output voltage. factory set: 48.0v e dc-ok led (green) on, when the output voltage is >90% of the adjusted output voltage f overload led (red) on, when the voltage on the output terminals is <90% of the adjusted output voltage, or in case of a short circuit in the output. input voltage is required. indicators, leds overload led dc-ok led dc-ok contact normal mode off on closed during bonuspower ? off on closed overload (v out < 90%) *) off open output short circuit *) off open temperature shut-down *) off open no input power off off open *) up to 4s of overloading, the power supply delivers continuous output current. after this, the output power is reduced to nea rly zero for approx. 17s before a new start attempt is automatically performed. if th e overload has been cleared, the device will operate no rmally. if the overload still exists, the output current will be delivered for 2 to 4s (depending on the overload) again followed by a 17s res t time. this cycle is repeated as long as the overload exists. the red overload led is permanently on when the overload current is continuously flowing. during the 17s rest period, the red led is flashing with a frequency of approx. 1.3hz. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 12/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 14. emc the power supply is suitable for applicat ions in industrial environm ent as well as in reside ntial, commercia l and light industry environment without any restrictions. a detailed emc re port is available on request. emc immunity according generic standards: en 61000-6-1 and en 61000-6-2 electrostatic discharge en 61000-4-2 contact discharge air discharge 8kv 15kv criterion a criterion a electromagnetic rf field en 61000-4-3 80mhz-2.7ghz 10v/m criterion a fast transients (burst) en 61000-4-4 input lines output lines dc-ok signal (coupling clamp) 4kv 2kv 1kv criterion a criterion a criterion a surge voltage on input en 61000-4-5 l ? n l ? pe, n ? pe 2kv 4kv criterion a criterion a surge voltage on output en 61000-4-5 + ? - + / - ? pe 1kv 1kv criterion a criterion a surge voltage on dc-ok en 61000-4-5 dc-ok signal ? pe 1kv criterion a conducted disturbance en 61000-4- 6 0.15-80mhz 10v criterion a mains voltage dips en 61000-4-11 0% of 100vac 40% of 100vac 70% of 100vac 0% of 200vac 40% of 200vac 70% of 200vac 0vac, 20ms 40vac, 200ms 70vac, 500ms 0vac, 20ms 80vac, 200ms 140vac, 500ms criterion a criterion c criterion a criterion a criterion a criterion a voltage interruptions en 61000-4-11 0% of 200vac (=0v) 5000ms criterion c voltage sags semi f47 0706 dips on the in put voltage according to semi f47 standard 80% of 120vac (96vac) 70% of 120vac (84vac) 50% of 120vac (60vac) 1000ms 500ms 200ms criterion a criterion a criterion a powerful transients vde 0160 over entire load range 750v, 1.3ms criterion c criterions: a: power supply shows normal operation behavior within the defined limits. c: temporary loss of function is possible. power supply may shut-down and restarts by itself. no damage or hazards for the powe r supply will occur. emc emission according generic standards: en 61000-6-3 and en 61000-6-4 conducted emission input lines en 55011, en 55022, fcc part 15, cispr 11, cispr 22 class b conducted emission output lines **) iec/cispr 16-1-2, iec/cispr 16-2-1 limits for dc power port acc. en 61000-6-3 are not fulfilled ***) radiated emission en 55011, en 55022 class b harmonic input current en 61000-3- 2 fulfilled for class a equipment voltage fluctuations, flicker en 61000-3-3 fulfilled *) this device complies with fcc part 15 rules. operation is subjected to fo llowing two conditions: (1) this device may not cause ha rmful interference, and (2) this device must accept any interferenc e received, including interference that may cause undesired operation. *) tested with constant current loads, non pulsing **) for information only, not mandatory for en 61000-6-3 ***) quasi-peak values fulfilled, average values +5db oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 13/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput switching frequencies the power supply has four converters with f our different switchin g frequencies included. one is nearly constant. the others ar e input voltage and load dependent. switching frequency 1 100khz resonant converter, nearly constant switching frequency 2 110khz to 500khz boost conv erter, input voltage and load dependent switching frequency 3 73khz to 114khz pfc conv erter, input voltage and load dependent switching frequency 4 35khz to 45khz aux. conv erter, input voltage and load dependent 15. e nvironment operational temperature *) -25c to +70c (-13f to 158f) reduce output power according fig. 15-1 storage temperature -40 to +85c (-40 f to 185f) for storage and transportation output de-rating 12w/c 60-70c (140f to 158f) humidity **) 5 to 95% r.h. iec 60068-2-30 vibration sinusoidal 2-17.8hz: 1.6mm; 17.8-500hz: 2g 2 hours / axis iec 60068-2-6 shock 15g 6ms, 10g 11ms 3 bumps / direction, 18 bumps in total iec 60068-2-27, din-rail mounting 30g 6ms, 20g 11ms 3 bumps / direction, 18 bumps in total iec 60068-2-27, with wall mounting bracket zm2.wall altitude 0 to 2000m (0 to 6 560ft) without any restrictions 2000 to 6000m (6 560 to 20 000ft) reduce output power or ambient temperature, see fig. 15-2 iec 62103, en 50178, overvoltage category ii altitude de-rating 30w/1000m or 5c/1000m > 2000m (6500ft), see fig. 15-2 over-voltage category iii iec 62103, en 50178, altitudes up to 2000m ii altitudes from 2000m to 6000m degree of pollution 2 iec 62103, en 50178, not conductive labs compatibility the unit does not re lease any silicone or other labs-criti cal substances and is suitable for use in paint shops. *) operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit. **) do not energize while condensation is present fig. 15-1 output current vs. ambient temp. fig. 15-2 output current vs. altitude allowed output current at 48v 0 -25 0 20 40 70c 2.5 5 7.5 10 12.5 15a c o n t i n u o u s 60 ambient temperature f o r t y p . 4 s allowed output current at 48v 0 0 2000 4000 6000m 2.5 5 7.5 10 12.5 15a c o n t i n u o u s altitude f o r t y p . 4 s a . . . t a m b < 6 0 c b . . . t a m b < 5 0 c c . . . t a m b < 4 0 c a b c oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 14/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 16. p rotection f eatures output protection electronically protected against overload , no-load and short-circuits *) output over-voltage protection typ. 58vdc max. 60vdc in case of an internal pow er supply defect, a redundant circuit limits the maximum output voltage. the output shuts down and automatically attempts to restart. degree of protection ip 20 en/iec 60529 penetration protection > 3.5mm / > 5mm top si de / bottom side; e. g. screws, small parts over-temperature protection yes output shut-down with automatic restart input transient protection mo v (metal oxide varistor) internal input fuse included not user replaceable *) in case of a protection event, audible noise may occur. 17. s afety f eatures input / output separation *) selv iec/en 60950-1 pelv iec/en 60204-1, en 50178, iec 62103, iec 60364-4-41 double or reinforced insulation class of protection i pe (protect ive earth) connection required isolation resistance > 5mohm input to output, 500vdc pe resistance < 0.1ohm touch current (leakage current) typ. 0.23ma / 0.63ma 100vac, 50hz, tn-,tt-mains / it-mains typ. 0.34ma / 0.93ma 120vac, 60h z, tn-,tt-mains / it-mains typ. 0.58ma / 1.56ma 230vac, 50h z, tn-,tt-mains / it-mains < 0.31ma / 0.77ma 110vac, 50hz, tn-,tt-mains / it-mains < 0.45ma / 1.13ma 132vac, 60hz, tn-,tt-mains / it-mains < 0.80ma / 2.00ma 264vac, 50hz, tn-,tt-mains / it-mains *) double or reinforced insulation oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 15/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 18. d ielectric s trength the output voltage is floating and has no ohmic connection to the ground. type and factory tests are conducted by the manufacturer. field tests may be c onducted in the field using the appropr iate test equipment which applies the voltage with a slow ramp (2s up and 2s down). connect all input-terminals togeth er as well as all ou tput poles before conducting the test. when testing, set the cut-off current settings to the value in the table below. fig. 18-1 dielectric strength a b c d type test 60s 2500vac 3000vac 500vac 500vac factory test 5s 2500vac 2500vac 500vac 500vac field test 5s 2000vac 2000vac 500vac 500vac cut-off current setting > 15ma > 15ma > 40ma > 1ma ad c b b *) n l input dc-ok earth, pe output - + to fulfil the pelv requirements a ccording to en60204- 1 6.4.1, we recommend that either the + pole, the C pole or any other part of the output circuit shall be conne cted to the protective earth system. this helps to avoid si tuations in which a load starts unexpectedly or can not be swit ched off when unnoticed earth faults occur. b*) when testing input to dc-ok ensure that the max. voltage between dc-ok and the output is not exceeded (column d). we recomm end connecting dc-ok pins and the output pins together when performing the test. 19. a pprovals ec declaration of conformity the ce mark indicates conformance with the - emc directive 2004/108/ec, - low-voltage directive (lvd) 2006/95/ec and - rohs directive 2011/65/eu iec 60950-1 2 nd edition cb scheme, information technology equipment ul 508 ind. cont. eq. listed for use as industri al control equipment; u.s.a. (ul 508) and canada (c22.2 no. 107-1-01); e-file: e198865 ul 60950-1 2 nd edition recognized for use as information technology equipment, level 5; u.s.a. (ul 60950-1) and canada (c22.2 no. 60950-1); e-file: e137006 applicable for altitudes up to 2000m. ansi / isa 12.12.01-2007 (class i div 2) recognized for use in hazardous location class i div 2 t3 groups a,b,c,d systems; u.s.a. (ansi / isa 12.12.01-2007) and canada (c22.2 no. 213-m1987) marine gl (germanischer lloyd) classified and abs (american bureau for shipping) pda environmental category: c, emc2 marine and offshore applications gost p certificate of conformity for russia and other gus countries oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 16/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 20. p hysical d imensions and w eight weight 1200g / 2.65lb din-rail use 35mm din-rails according to en 60715 or en 50022 with a height of 7.5 or 15mm. the din-rail height must be added to the unit depth (127mm) to calculate the total required installation depth. installation clearances see chapter 2 fig. 20-1 front view fig. 20-2 side view oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 17/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 21. a ccessories 21.1. zm2.wall w all m ounting b racket this bracket is used to mount the power supply onto a flat surface without utilizing a din-rail. c 21.2. zm15.side s ide m ounting b racket this bracket is used to mount dimension units sideways with or without utilizing a din-rail. the two aluminum brackets and the black plastic slider of the unit have to be detached, so th at the steel brackets can be mounted. for sideway din-rail mounting, the remo ved aluminum brackets and the black pl astic slider need to be mounted on the steel bracket. side mounting with din-rail brackets side mounting without din-rail brackets oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 18/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 21.3. yr40.482 r edundancy m odules yr40.482 C (2x 20a inputs, 1x 40a output) the yr40.482 is equipped with two input channels, which are individua lly decoupled by utilizing mosfet technology. using mosfets instead of diodes reduces the heat generation and the voltage drop between input and output. the yr40.482 does not require an additional auxiliary voltage and is self-powered even in case of a short circuit across the output. due to the low power losses, the unit is very slender and only requires 46mm width on the din-rail. fig. 21-1 typical 1+1 redundant configuration fo r 48v, 10a with a dual redundancy module 48v 10a load l n pe failure monitor yr40.482 *) redundancy module input 1 input 2 output + - + - + - i i + + - - qs20.481 power supply 48v,10a dc- ok l n pe + + - - qs20.481 power supply 48v,10a dc- ok l n pe *) yrm2.diode or yr2.diode also possible (2 x required) oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 19/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 22. a pplication n otes 22.1. r epetitive p ulse l oading typically, a load current is not constant and varies over time. this power suppl y is designed to support loads with a higher short-term power demand (=bonuspower ? ). the short-term duration is ha rdware controlled by an output power manager and is available on a repeated basis. if the bonuspower ? load lasts longer than the hardware controller allows it, the output volt age will dip and the next bonuspower ? is available after the bonuspower ? recovery time (see chapter 6 ) has elapsed. to avoid this, the following rules must be met: a) the power demand of the pulse must be be low 150% of the nominal output power. b) the duration of the pulse power must be shorter than the allowed bonuspower ? time. (see output section) c) the average (r.m.s.) output current must be below the specified cont inuous output current. if the r.m.s. current is higher, the unit will respond wi th a thermal shut-down afte r a period of time. use the maximum duty cycle curve ( fig. 22-2 ) to check if the average output cu rrent is below the nominal current. fig. 22-1 repetitive pulse loads, definitions fig. 22-2 max. duty cycle curve 100% p peak t peak p 0 t 0 max. 150% 150% 100 0 0.2 0.4 0.6 0.8 1.0 dutycycle 110 120 130 140 p peak p 0 = 1 0 % p 0 = 5 0 % p 0 = 7 5 % p 0 = 1 0 0 % p 0 base load (w) p peak pulse load (above 100%) t 0 duration between pulses (s) t peak pulse duration (s) d uty c ycle t 0 = t peak - (d uty c ycle x t peak ) t peak + t 0 t peak d uty c ycle = example: a load is powered continuously with 240w (= 50% of the rated output load). fr om time to time a peak power of 720w (= 150% of the rated out put load) is needed for 1 second. the question is: how often can this pulse be supplied without overloading the power supply? - make a vertical line at p peak = 150% and a horizontal line where the vertical line crosses the p 0 = 50% curve. read the max. duty cycle fro m the duty cycle-axis (= 0.37) - c alculate the required pause (base load) length t 0 : 20/25 - result: the required pause length = 1.7s - max. repetition rate = pulse +pause length = 2.7s more examples for pulse load compatibility: p peak p 0 t peak t 0 p peak p 0 t peak t 0 720w 480w 1s >25s 720w 240w 0.1s >0.16s 720w 0w 1s >1.3s 720w 240w 1s >1.6s 600w 240w 1s > 0.75s 720w 240w 3s >4.9s d uty c ycle t 0 = t peak - (d uty c ycle x t peak ) 0.37 1s - (0.37 x 1s) == 1 . 7 s oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qs20.481 q-series 48v, 10a, s ingle p hase i nput 22.2. p eak c urrent c apability solenoids, contactors and pneumatic modu les often have a steady state coil an d a pick-up coil. the inrush current demand of the pick-up coil is several times higher than the st eady-state current and usually exceeds the nominal output current (including the powerboost). the same situation applies when sta rting a capacitive load. branch circuits are often protected with ci rcuit breakers or fuses. in case of a short or an overload in the branch circuit, the fuse needs a certain amount of over -current to trip or to blow. the p eak current capability ensures the safe operation of subseque nt circuit breakers. assuming the input voltage is turned on before such an event, the built-in large sized output capacitors inside the power supply can deliver extra current. discharging this capacitor causes a voltage dip on the output. the following two examples show typical voltage dips: fig. 22-3 peak load with 2x the nominal current for 50ms, typ. fig. 22-4 peak load with 5x the nominal current for 5ms, typ. 10ms/div output voltage output current 48v 0a 20a 39v 1ms/div output voltage output current 48v 0a 50a 32v peak load 20a (resistive) for 50ms output voltage dips from 48v to 39v. peak load 50a (resistive) for 5ms output voltage dips from 48v to 32v. please note: the dc-ok relay triggers when the voltage dips more than 10% for longer than 1ms. 22.3. b ack - feeding l oads loads such as decelerating motors and induc tors can feed voltage back to the power supply. this feature is also called return voltage immunity or resi stance against back- e.m.f. ( e lectro m agnetic f orce). this power supply is resistant and does not show malfunctioning when a load f eeds back voltage to the power supply. it does not matter whether the power supply is on or off. the maximum allowed feed-back- voltage is 58vdc. the absorbin g energy can be calculated according to the built-in large sized output capacitor wh ich is specified in chapter 6 . 22.4. e xternal i nput p rotection the unit is tested and approved for bran ch circuits up to 20a. an external pr otection is only required if the supplying branch has an ampacity greater than this. check also local codes and local requirements. in so me countries local regulations might apply. if an external fuse is necessary or utilized, minimum requirements need to be considered to avoid nuisance tripping of the circuit breaker. a mi nimum value of 10a b- or c-char acteristic breaker should be used oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 21/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 22.5. c harging of b atteries the power supply can be used to char ge lead-acid or maintenance free batte ries. (four 12v batteries in series) instructions for charging batteries: a) set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge voltage. end-of-charge voltage 55. 6v 55.0v 54.3v 53.6v battery temperature 10c 20c 30c 40c b) use a 13a, 15a or 16a circuit breaker (or blocking diode) between the power supply and the battery. c) ensure that the output current of the power supply is below the allowe d charging current of the battery. d) use only matched batteries when putting 12v types in series. e) the return current to the power s upply (battery discharge current) is typ. 10ma when the power supply is switched off (except in case a blocking diode is utilized). 22.6. o utput c ircuit b reakers standard miniature circuit breakers (mcbs or ul 1077 circuit breakers) are commonl y used for ac-supply systems and may also be used on 48v branches. mcbs are designed to protect wires and ci rcuits. if the ampere value and the char acteristics of the mcb are adapted to the wire size that is used, the wiring is considered as thermally safe rega rdless of whether the mcb opens or not. to avoid voltage dips and under-voltage situations in adjacent 24v branches wh ich are supplied by the same source, a fast (magnetic) tripping of the mcb is desired. a quick shutdown within 10ms is necessary corresponding roughly to the ride-through time of plc's. this re quires power supplies with high current reserves and large output capacitors. furthermore, the impedance of the faulty branch must be sufficiently small in or der for the current to actually flow. the best current reserve in the power su pply does not help if ohms law does not permit current flow. the following table has typical test results showing which b- and c-characteristic mcbs magneti cally trip depending on the wire cross section and wire length. fig. 22-5 test circuit maximal wire length *) for a fast (magnetic) tripping: 0.75mm2 1.0mm2 1.5mm2 2.5mm2 c-2a 67m 86m 129m 185m c-3a 48m 63m 92m 157m c-4a 32m 44m 63m 93m c-6a 12m 18m 23m 38m c-8a 5m 6m 9m 14m c-10a 4m 5m 7m 11m c-13a 2m 2m 3m 5m b-6a 30m 39m 52m 87m b-10a 11m 16m 22m 29m b-13a 9m 12m 17m 24m b-16a - 2m 2m 4m mcb power supply ac dc + - + - load wire length s1... fault simulation switch s1 *) dont forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and C wi re). oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 22/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput 22.7. p arallel u se to i ncrease o utput p ower 23/25 power supplies from the same series (q-s eries) can be para lleled to increase the output power. the output voltage sh all be adjusted to the same value (100mv) with the same load conditions on all units, or the units can be left with the factory settings. if more than three units are connected in parallel, a fuse or circuit breaker with a rating of 15a or 16a is require d on each output. alternatively, a diode or redundancy module can also be utilized. keep an installation clearance of 15 mm (left / right) between two power supplies and avoid installing the power su pplies on top of each other. do not use power supplies in parallel in mounting orientations other than the sta ndard mounting orientation (input terminals on bottom and output terminals on the t op of the unit) or in any other cond ition where a derating of the output current is required (e.g. altitude, above 60c, ). unit a ac dc unit b ac dc - + - + load + - pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 22.8. p arallel u se for r edundancy power supplies can be paralleled fo r redundancy to gain higher system ava ilability. redundant systems require a certain amount of extra power to support the load in case one power supply unit fails. the simp lest way is to put two power supplies in parallel. th is is called a 1+1 re dundancy. in case one power supply unit fails, the other one is automatically able to support the load current without any interruption. redundant systems for a higher power demand are usually built in a n+1 method. e.g. five power supplies, each rated for 10a are paralleled to build a 40a redundant system. for n+1 redundancy the same restrictions apply as for incr easing the output power, see also section 22.7 . 48v 10a load l n pe failure monitor yr40.482 *) redundancy module input 1 input 2 output + - + - + - i i + + - - qs20.481 power supply 48v,10a dc- ok l n pe + + - - qs20.481 power supply 48v,10a dc- ok l n pe *) yrm2.diode or yr2.diode also possible (2 x required) please note: this simple way to build a redundant system does not cover failures such as an internal short circuit in the secondary side of the power supply. in such a case, the defective unit becomes a load for the other power supplie s and the output voltage can not be maintained any more. this can be avoided by utilizing decoupling diodes, which are in cluded in the redundancy module yr40.482. recommendations for building redundant power systems: a) use separate input fuses for each power supply. b) monitor the individual power supply units. therefore, use the dc-ok relay contact of the qs20 power supply. c) it is desirable to set the output voltages of all units to the same value ( 100m v) or leave it at the factory setting. oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qs20.481 q-series 48v, 10a, s ingle p hase i nput 22.9. s eries o peration unit a ac dc unit b ac dc - + - + load + - earth (see notes) power supplies of the same type can be connected in series for higher output voltages. it is possible to connec t as many units in series as needed, providing the sum of the output volt age does not exceed 150vdc. voltages with a potential above 60vdc are not selv any more and can be dangerous. such voltages must be installed with a protection against touching. earthing of the output is required when the sum of the output voltage is above 60vdc. avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the output terminals. keep an installation clearance of 15mm (left / right) be tween two power supplies and avoid installing the power supplies on top of each other. do not use power supplies in series in mounting orientations other than the standard mounting orientation (input termi nals on bottom and output terminals on the top of the unit). pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 22.10. i nductive and c apacitive l oads the unit is designed to supply any kind of loads, in cluding unlimited capaciti ve and inductive loads. 22.11. o peration on t wo p hases 240v +15% max. fuse l2 l1 l3 l n pe power supply ac dc internal fuse the power supply can also be used on two-phases of a three-phase-system. such a phase-to-phase connection is allowed as long as the supplying voltage is below 240v +15% . use a fuse or a circuit breaker to protect the n input. the n input is interna lly not protected and is in this case connected to a hot wire. appropriate fuses or circ uit breakers are specified in section 22.4 external input protection. 22.12. u se in a t ightly s ealed e nclosure when the power supply is installed in a tightly sealed encl osure, the temperature inside the enclosure will be higher than outside. in such situations, th e inside temperature defi nes the ambient temperatur e for the power supply. the following measurement results can be used as a reference to estimate the temperature rise inside the enclosure. the power supply is placed in the middle of the box , no other heat producing items are inside the box enclosure: rittal typ ip66 box pk 9522 100, plastic, 254x180x165mm load: 48v, 8a; (=80%) load is placed outside the box input: 230vac temperature inside enclosure: 48.2c (i n the middle of the right side of the pow er supply with a distance of 2cm) temperature outside enclosure: 24.2c temperature rise: 24.0k oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 24/25
qs20.481 q-series 48v, 10a, s ingle p hase i nput oct. 2013 / rev. 2.2 ds-qs20.481-en all parameters are specified at 48v, 10a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 22.13. m ounting o rientations mounting orientations other than input terminals on the bottom and output on the top require a reduction in continuous output power or a limitation in the maximum allowed ambi ent temperature. the amount of reduction influences the lifetime expectancy of the power supply. therefore, two diffe rent derating curves for continuous operation can be found below: curve a1 recommended output current. curve a2 max allowed output current (res ults in approximately half the lifetime expectancy of a1). fig. 22-6 mounting orientation a (standard orientation) power supply output input output current 0 10 20 30 40 60c 2 6 8 10a 50 a 1 4 ambient temperature fig. 22-7 mounting orientation b (upside down) power supply output input output current 0 10 20 30 40 60c 2 6 8 10a 50 4 ambient temperature a 1 a 2 fig. 22-8 mounting orientation c (table-top mounting) output current 0 10 20 30 40 60c 2 6 8 10a 50 4 ambient temperature a 1 a 2 fig. 22-9 mounting orientation d (horizontal cw) power supply output input output current 0 10 20 30 40 60c 2 6 8 10a 50 4 ambient temperature a 1 a 2 fig. 22-10 mounting orientation e (horizontal ccw) power supply output input output current 0 10 20 30 40 60c 2 6 8 10a 50 4 ambient temperature a 1 a 2 25/25

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