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qs40.484 q-series 48v, 20a, s ingle p hase i nput p ower s upply ? ac 200-240v input ? width only 125mm, weight only 1.8kg ? 95.0% full load and excellent partial load efficiencies ? 50% bonuspower ? , 1440w for up to 4s ? 55a high peak current for 25 ms for easy fuse tripping ? safe hiccup plus overload mode ? active pfc (power factor correction) ? negligible low input inrush current surge ? full power between -25c and +60c ? current sharing feature for parallel use ? internal data logging for troubleshooting included. ? dc-ok relay contact ? shut-down input ? 3 year warranty 1/28 g eneral d escription the most outstanding features of the dimension q- series din-rail power supplies are the extremely high efficiencies and the small size s, which are achieved by a synchronous rectification and other technological designs. the qs40.484 is a device fo r 200-240v mains voltages. large power reserves of 150% support the starting of heavy loads such as dc-moto rs or capacitive loads. in many cases this allows the use of a unit from a lower wattage class which saves space and money. 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 and input fuses as well as the near zero input inrush current make installation and usage simple. diagnostics are easy due to the dc-ok relay, a gr een dc-ok led and the red overload led. a large international approval package for a variety of applications makes this unit suitable for nearly every application. s hort - form d ata output voltage dc 48v nominal adjustment range 48 - 54v output current 20 C 17.8a continuous 30 C 26.7a short term (4s) output power 960w continuous 1440w short term (4s) output ripple < 150mvpp 20hz to 20mhz input voltage ac 200-240v -15%/+10% mains frequency 50-60hz 6% ac input current 4.6a at 230vac power factor 0.96 at 230vac ac inrush current typ. 14a peak at 230vac efficiency 95.0% at 230vac losses 50.5w at 230vac temperature range -25c to +70c operational derating 24w/c +60 to +70c hold-up time typ. 30ms at 230vac dimensions 125x124x127mm wxhxd weight 1800g / 3.97lb o rder n umbers power supply qs40.484 48-54v standard unit accessory zm2.wall wall mount bracket uf20.481 buffer unit yr40.482 redundancy module m arkings ind. cont. e q. ul 508 ul 60950-1 emc, lvd, rohs marine nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qs40.484 q-series 48v, 20a, s ingle p hase i nput i ndex page page 1. intended use .......................................................3 2. installation requirements ...................................3 3. ac-input ...............................................................4 4. input inrush current ...........................................5 5. dc-input ...............................................................5 6. output .................................................................6 7. hold-up time .......................................................8 8. dc-ok relay contact ..........................................9 9. shut-down input .................................................9 10. remote control of output voltage .................10 11. internal data logging .......................................10 12. efficiency and power losses ..............................11 13. lifetime expectancy and mtbf .........................12 14. functional diagram ...........................................12 15. terminals and wiring ........................................13 16. front side and user elements ...........................14 17. emc ....................................................................15 18. environment ......................................................16 19. protection features ...........................................17 20. safety features ..................................................17 21. dielectric strength ............................................18 22. approvals .......................................................... 18 23. physical dimensions and weight ..................... 19 24. accessories ........................................................ 20 24.1. zm2.wall - wall mounting bracket .......20 24.2. uf20.481 - buffer module ........................20 24.3. yr40.482 - redundancy module ..............21 25. application notes ............................................. 22 25.1. repetitive pulse loading ..........................22 25.2. peak current capability ...........................23 25.3. external input protection .........................23 25.4. charging of batteries ...............................24 25.5. output circuit breakers ............................24 25.6. parallel use to increase output power ....25 25.7. parallel use for redundancy ....................25 25.8. series operation .......................................26 25.9. inductive and capacitive loads ................26 25.10. back-feeding loads ..................................26 25.11. operation on two phases ........................27 25.12. use in a tightly sealed enclosure ............27 25.13. mounting orientations ............................28 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. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 2/28
qs40.484 q-series 48v, 20a, 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 us e in non-hazardous, ordinary or unclassified 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 and input terminals are located on the bo ttom of the unit. for other mounting orientations see de -rating requirements in this document. see chapter 25.13 . 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 15%! 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. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 3/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 3. ac-i nput ac input nom. ac 200-240v suitable for tn, tt and it mains networks ac input range min. 170-264v ac continuous operation min. 110-170vac full power for up to 200ms min. 0-170vac no damage to the unit 264-300vac < 500ms allowed voltage l or n to earth max. 300vac continuous, iec 62103 input frequency nom. 50C60hz 6% turn-on voltage typ. 164vac steady-st ate value, load independent, see fig. 3-1 shut-down voltage typ. 151vac steady- state value, load independent, see fig. 3-1 input current typ. 4.6a at 48v, 20a, see fig. 3-3 power factor *) typ. 0.96 at 48v, 20a, see fig. 3-4 crest factor **) typ. 1.65 at 48v, 20a start-up delay typ. 750ms see fig. 3-2 rise time typ. 18ms at 48v, 20a, resistive load, 0mf see fig. 3-2 typ. 35ms at 48v, 20a, resistive load, 20mf see fig. 3-2 turn-on overshoot max. 200mv 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 170v rated input range v in p out 151v 264vac shut-down 164v 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 at 48v 20a 2 4 6 8 10 12 14 16 18 0 1 2 3 4 5 6a input current, typ. output current power factor, typ. 2 4 6 8 10 12 14 16 18 20 a 0.75 0.80 0.85 0.90 0.95 1.00 output current nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 4/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 4. i nput i nrush c urrent the power supply is equipped with an active inrush current limitation circuit, which li mits the input inrush current after turn-on to a negligible low valu e. the input current is usually smalle r than the steady sta te input current. inrush current *) max. 18a peak over entire temperature range typ. 14a peak over entire temperature range inrush energy max. 4a 2 s over entire temperature range inrush delay typ. 750ms *) the charging current into emi suppression capacitors is disregarded in the first microseconds after switch-on. fig. 4-1 typical turn-on behaviour at nominal load and 25c ambient temperature output 50ms/div input 230vac 48vdc input current 5a / div 5. dc-i nput do not operate this power supply with dc-input voltage. check the cps20. 481-d1 unit instead. two cps20.241-d1 units in parallel mi ght be necessary. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 5/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 6. o utput output voltage nom. 48v adjustment range min. 48-54v guaranteed max. 56v ****) at clockwise end position of potentiometer factory setting typ. 48.0v 0.2%, at fu ll load, cold unit, in single use mode typ. 46.0v 0.2%, at full load, cold unit, in parallel use mode typ. 48.0v at no load, cold unit, in parallel use mode line regulation max. 10mv 170-264vac load regulation max. 50mv in s ingle use mode: static value, 0a ? 20a, see fig. 6-1 typ. 2000mv in parallel use mode: static value, 0a ? 20a, see fig. 6-2 ripple and noise voltage max. 150mvpp 20hz to 20mhz, 50ohm output current nom. 20a continuo usly available at 48v, see fig. 6-1 and fig. 6-2 nom. 17.8a continuously available at 54v, see fig. 6-1 and fig. 6-2 nom. 30a short term available bonuspower ?*) , at 48v for typical 4s, see fig. 6-1 and fig. 6-2 nom. 26.7a short term available bonuspower ?*) , at 54v for typical 4s, see fig. 6-1 and fig. 6-2 typ. 55a up to 25ms, output voltage stays above 40v, see fig. 6-4 , this peak current is available once every second. see chapter 25.2 for more peak current measurements. output power nom. 960w contin uously available at 48-54v nom. 1440w *) short term available bonuspower ?*) at 48-54v bonuspower ? time typ. 4s duration until the output voltage dips, see fig. 6-5 bonuspower ? recovery time typ. 7s overload fr ee time to reset power manager, see fig. 6-6 overload behavior 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. 30a ***) load impedance 50mohm, see fig. 6-3 max. 35a ***) load impedance 50mohm, see fig. 6-3 max. 11.5a average (r.m.s.) curre nt, load impedance 50mohm, see fig. 6-3 min. 55a up to 25ms, load impedance <10mohm, see fig. 6-4 typ. 63a up to 25ms, load impedance <10mohm, see fig. 6-4 output capacitance typ. 3 700 f included in th e 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 25.1 . if the power supply is loaded longer with the bonuspower ? than shown in the bonus-time diagram (see fig. 6-5 ), the max. output power is automatically reduced to 960w. if the power requirement is continuously above 960w 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 behavior is called hiccup mode which is described below. if the voltage is above 40v, the unit continuously deli vers current. **) hiccup plus mode up to 4s of overloading, the power supply delivers continuous output current. after this, the output power is reduced to nearly zero for approx. 17s before a new start attempt is automatically performed. if the overload has been cleared, the device will operat e normally. if the overload still exists, the output current will be delivered for 2 to 4s (depending on the overload) again foll owed by a 17s rest time. this cycle is repeated as long as the overload exists. see 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 55v. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 6/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput fig. 6-1 output voltage vs . output current in single use mode, typ. fig. 6-2 output voltage vs . output current in parallel use mode, typ. output voltage 0 0 5 10 15 20 8 16 24 56v 32 40 48 30 25 35a output current adjustment range hiccup mode a b a b short-term (4s) then switching to curve continuously available a a b output voltage (parallel use, typ.) 42v 01020 44v 46v 48v 56v 50v 52v 54v 30a 25 15 5 adjustment range factory setting continuously allowed bonus power output current fig. 6-3 short-circuit on output, hiccup plus mode, typ. fig. 6-4 dynamic overcurrent capability, typ. output current 0 35a 17s 17s 17s 2s 2s 2s t short -circuit normal operation normal operation output voltage (dynamic behavior, < 25ms) 0 0 8 16 24 54v 32 40 48 70a 30 60 10 20 40 50 adjustment range output current fig. 6-5 bonus time vs. output power fig. 6-6 bonuspower ? recovery time ma x . bonus time 0 100 120 130 140 150 170% 1 2 3 4 5s 110 160 output power m i n . 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 comes on and after the end of an output short circuit or output overload. fig. 6-7 bonuspower ? after input turn-on fig. 6-8 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% nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 7/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 7. h old - up t ime ac 230v hold-up time typ. 58ms at 48v, 10a, see fig. 7-1 min. 47ms at 48v, 10a, see fig. 7-1 typ. 30ms at 48v, 20a, see fig. 7-1 min. 24ms at 48v, 20a, see fig. 7-1 fig. 7-1 hold-up time vs. input voltage fig. 7-2 shut-down behavior, definitions 0 10 20 30 40 60ms 170 190 210 230 250vac input voltage hold-up time 48v, 10a, typ. 4 8 v , 2 0 a , t y p . 48v, 10a, min. 50 4 8 v , 2 0 a , m i n . - 5% hold-up time zero transition output voltage input voltage nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 8/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 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 voltage reaches 90% of the adjusted output voltage. 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 21. fig. 8-1 dc-ok relay contact behavior 250ms 0.9* v adj < 1ms 10% open v out = v adj open closed closed > 1ms 9. s hut - down i nput this feature allows a switch-off of the output of the power supply with a signal switch or an external voltage. the shut-down function ramps down and ha s no safety feature included. the s hut-down occurs immediately while the turn-on is delayed up to 350ms. in a s hut-down condition, the output voltage is <4v and the output power is <0.5w. the voltage between different minus pole output terminals must be below 1v when units are connected in parallel. in a series operation of multiple power supplies only wiring option a with individual signal switches is allowed. please note that option c requires a curre nt sink capability of the voltage source. do not use a blocking diode. fig. 9-1 activation of the shut-down input 15 16 off: linked on : open shut- down input option a: 15 16 off: i > 0.3ma on : i < 0.1ma shut- down input option b: - (via open collector) i n.c. 15 16 off: u < 1v on : u = 4 -29v shut- down input option c: - (via external voltage + u n.c. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 9/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 10. r emote c ontrol of o utput v oltage this feature is not supported by the qs40.484 unit. choose the qs40.481 when th is feature is needed. 11. i nternal d ata l ogging a protected microcontroller inside the power supply acquires and stores operating data during the life of the unit. the data can be downloaded with a small t ool and special software by the puls serv ice and repair personnel, even also many times when the unit is defect. the data allows for better troubleshooting. analysis of what happened before a failure can be determined much more accurately. acquired data: - family name of unit (qs 40), revision of firmware - operational hours - expired portion of lifetime (combination of temperature and period of time) - maximum ambient temperatures with timestamp (max. 47 values) - maximal input voltages with timestamp (max. 47 values) and type of i nput voltage (ac or dc) - failure report (various internal errors) - number and timestamp (max. 20 valu es) of input overvoltage transients - number and timestamp (max. 20 values ) of over-temperature shut-downs - number of turn-on sequences the data will be acquired with a fi xed sampling rate unless the peak de tectors do trigger due to an abnormal condition. in such cases, the abnormal condition will be captured . furthermore, data will be acquired every time shortly before the unit switches off. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 10/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 12. e fficiency and p ower l osses ac 230v efficiency typ. 95.0% at 48v, 20a average efficiency *) typ. 94.2% 25% at 5a, 25% at 10a, 25% at 15a. 25% at 20a power losses typ. 3.2w wi th activated shut-down typ. 12.0w at 48v, 0a (no load) typ. 30.1w at 48v, 10a (half load) typ. 50.5w at 48v, 20a (full load) *) 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. 12-1 efficiency vs. output current at 48v, typ. fig. 12-2 losses vs. output current at 48v, typ. efficiency 4 6 8 101214161820a 91 92 93 output current 94 95% power losses 0 2 4 6 8 10 12 14 20a 10 0 30 40 50 60w 16 18 20 output current fig. 12-3 efficiency vs. input voltage at 48v, 20a, typ. fig. 12-4 losses vs. input voltage at 48v, 20a, typ. efficiency 170 190 210 230 250 270vac 93 94 95 input voltage 96% power losses 30 35 40 45 50 55 60w 170 190 210 230 250 270vac input voltage nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 11/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 13. l ifetime e xpectancy and mtbf ac 230v calculated lifetime expectancy *) 345 000h *) at 48v, 10a and 25c 122 000h at 48v, 10a and 40c 184 000h *) at 48v, 20a and 25c 65 000h at 48v, 20a and 40c mtbf **) sn 29500, iec 61709 392 000h at 48v, 20a and 40c 693 000h at 48v, 20a and 25c mtbf **) mil hdbk 217f 158 000h at 48v, 20a and 40c; ground benign gb40 214 000h at 48v, 20a and 25c; ground benign gb25 *) the calculated 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 calcu lated according to the capacitors manufacturer specification. the manufacturer of the electrolytic capacitors only guarantees a maximum life o f 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. 14. f unctional d iagram fig. 14-1 functional diagram + + - - v out dc-ok contact output over- voltage protection pfc converter input fuse input filter input rectifier inrush limiter output voltage regulator power converter output filter dc ok relay output voltage monitor output power manager temper- ature shut- down overload led dc-ok led n l single / parallel shut- down 13 14 15 16 event datalogger shut-down input nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 12/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 15. t erminals and w iring the terminals are ip20 finger sa fe constructed and suitable for field and factory wiring. input output dc-ok, shut-down type screw termination screw termin ation spring-clamp termination solid wire 0.5-6mm 2 0.5-16mm 2 0.15-1.5mm 2 stranded wire 0.5-4mm 2 0.5-10mm 2 0.15-1.5mm 2 american wire gauge awg 20-10 awg 22-8 awg 26-14 max. wire diameter 2.8mm (including ferrules) 5.2mm (including ferrules) 1.5mm (including ferrules) wire stripping length 7mm / 0.28inc h 12mm / 0. 5inch 7mm / 0.28inch screwdriver 3.5mm slotted or cross- head no 2 3.5mm or 5mm slotted or cross-head no 2 3mm slotted (to open the spring) recommended tightening torque 1nm, 9lb .in 2.3nm, 20.5lb.in not applicable 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 strande d 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. daisy chaining: 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 54a. if the current is higher, use a separate distribution terminal block as shown in fig. 15-2 . fig. 15-1 daisy chaining of outputs fig. 15-2 using distribution terminals load + - power supply + + - - output power supply + + - - output max 54a! distribution terminals load + - power supply + + - - output power supply + + - - output nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 13/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 16. f ront s ide and u ser e lements fig. 16-1 front side a input terminals (screw terminals) n, l line input ...pe (protective earth) input b output terminals (screw terminals, two pins per pole) + positive output C ne gative (return) output c parallel use single use selector set jumper to parallel use when power supplies are connected in parallel to incr ease the output power. in order to achieve a sharing of th e load current between the individual power supplies, the parallel use regulates the output voltage in such a manner that the voltage at no load is approx. 4% higher than at nominal load. see also chapter 25.6 . a missing jumper is equal to a single use mode. d output voltage potentiometer multi turn potentiometer; open the flap to se t the output voltage. factory set: 48.0v at full out put current, single use mode. e dc-ok led (green) on, when the voltage on the output terminals 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. - flashing, when the shut-down has been activated or the unit has switched off due to over-temperature. - input voltage is required g dc-ok relay contact the dc-ok relay contact is sync hronized with the dc-ok led. see chapter 8 for details. h shut-down input allows the power supply to be shut down. can be activated with a switch contact or an external voltage. indicators, leds overload led dc-ok led dc-ok contact normal mode off on closed during bonuspower ? off on closed overload (hiccup mode) flashing off open output short circuit flashing off open temperature shut-down flashing off open active shut-down input flashing off open no input power off off open nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 14/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 17. 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 2kv 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 200vac 40% of 200vac 70% of 200vac 0vac for 20ms 80vac for 200ms 140vac for 500ms criterion a criterion c 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 200vac 70% of 200vac 50% of 200vac 160vac for 1000ms 140vac for 500ms 100vac for 200ms criterion a criterion a criterion a powerful transients vde 0160 over entire load range 750v, 1.3ms criterion a 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 5db higher than average limits for dc power port according en 61000-6-3 ***) radiated emission en 55011, en 55022 class b harmonic input current en 61000-3- 2 fulfilled for class a equipment voltage fluctuations, flic ker 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 ***) restrictions apply for applications in residential, commercial and light-industrial environments, where local dc power net works according to en 61000-6-3 are involved. no restricti ons for all kinds of industrial applications. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 15/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput switching frequencies the power supply has four converters with f our different switchin g frequencies included. switching frequency 1 105khz resonant converter, nearly constant switching frequency 2 35khz to 150khz pfc conv erter, input voltage and load dependent switching frequency 3 10khz to 300khz boost conv erter, output voltage and load dependent switching frequency 4 28khz to 40khz aux. conv erter, input voltage and load dependent 18. e nvironment operational temperature *) -25c to +70c (-13f to 158f) reduce output power according fig. 18-1 storage temperature -40 to +85c (-40 f to 185f) for storage and transportation output de-rating 24w/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: 1g ***) 2 hours / axis iec 60068-2-6 shock 15g 6ms, 10g 11ms ***) 3 bumps / direction, 18 bumps in total iec 60068-2-27 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. 18-2 iec 62103, en 50178, overvoltage category ii altitude de-rating 60w/1000m or 5c/1000m > 2000m (6500ft), see fig. 18-2 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 or surrounding temperature and is defined as the air temperature 2cm bel ow the unit. **) do not energize while condensation is present. ***) higher levels allowed when using the wall mounting bracket zm2.wall fig. 18-1 output current vs. ambient temp. fig. 18-2 output current vs. altitude 0 -25 0 20 40 70c 5 10 15 20 25 30a c o n t i n u o u s 60 ambient temperature short-term (4s) allowed output current at 48v 0 0 2000 4000 6000m 5 10 15 20 25 30a c o n t i n u o u s altitude 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 short-term (4s) allowed output current at 48v nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 16/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 19. p rotection f eatures output protection electronically protected against overload , no-load and short-circuits *) output over-voltage pr otection typ. 58.8vdc 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 protecti on ip 20 en/iec 60529 caution: for use in a contro lled environment according to csa 22.2 no 107.1-01. penetration protection > 5mm 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. 20. 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. 0.59ma / 1.38ma 230vac, 50hz, tn-,tt-mains / it-mains max. 0.75ma / 1.74ma 264vac, 50h z, tn-,tt-mains / it-mains *) double or reinforced insulation nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 17/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 21. 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. 21-1 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 > 20ma > 20ma > 40ma > 1ma a d c b b *) l input dc-ok 13 14 earth, pe output 15/16 +/- shut-down n 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. 22. 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/ec. iec 60950-1 2 nd edition cb scheme, information technology equipment applicable for altitudes up to 2000m. 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. 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 nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 18/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 23. p hysical d imensions and w eight weight 1800g / 3.97lb 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. 23-1 front view fig. 23-2 side view nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 19/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 24. a ccessories 24.1. zm2.wall - w all mounting bracket this bracket is used to mount specific dimension units onto a flat surface without utilizing a din-rail. 24.2. uf20.481 - b uffer module this buffer unit is a supplementary device for dc 48v power supplies. it delivers power to bridge typical mains failures or extends the hold-up time after turn-off of the ac power. in times when the power supply provide sufficient voltages, the buffer unit stores energy in integrated el ectrolytic capacitors. in case of mains voltage fa ult, this energy is released again in a regulated process. dc buffer unit(s) power supply load ac + - s the buffer unit does not require any control wi ring. it can be adde d in parallel to the load circuit at any given point. buffer units can be added in pa rallel to increase the output ampacity or the hold-up time. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 20/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 24.3. yr40.482 - r edundancy m odule the yr40.482 is equipped with two input ch annels (20a each), wh ich are individually decoupled by utilizing mosfet technology. th e output current can go as high as 40a. using mosfets instead of diodes reduces the heat generation and the voltage drop between input and output. the yr40.482 does not require an a dditional auxiliary voltage a nd 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. 24-1 typical 1+1 redundant configuration for 20a with a dual redundancy module l n pe i l n pe + + - - 48v, 20a parallel use single use dc- ok qs40.484 48-54v 960w power supply ac input l n pe + + - - 48v, 20a parallel use single use dc- ok qs40.484 48-54v 960w power supply ac input 48v 20a load failure monitor yr40.482 redundancy module input 1 input 2 output + - + - + - i nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 21/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25. a pplication n otes 25.1. 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. 25-2 ) to check if the average output cu rrent is below the nominal current. d) the duty cycle must be below 0.75. fig. 25-1 repetitive pulse loads, definitions fig. 25-2 max. duty cycle curve 100% p peak t peak p 0 t 0 max. 150% 150% 100 0 0.2 0.4 0.6 0.75 duty cycle 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 480w (= 50% of the rated output load). fr om time to time a peak power of 1440w (= 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 : 22/28 - r esult: 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 1440w 960w 1s >25s 1440w 480w 0.1s >0.16s 1440w 0w 1s >1.3s 1440w 480w 1s >1.6s 1200w 480w 1s > 0.75s 1440w 480w 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 nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25.2. p eak c urrent c apability the power supply can deliver peak currents (up to several m illiseconds) which are higher than the specified short term currents. this helps to start current demanding loads. solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. the inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal ou tput current (including the bonuspower ? ). the same situation applies when starting a capacitive load. the peak current capability also ensures the safe operati on of subsequent circuit breakers of load circ uits. the load branches are often individually protected with circuit breakers or fuses. in ca se of a short or an overload in one branch circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. this avoids voltage loss in adjacent circuits. the extra current (peak current) is supplie d by the power converter and the built -in large sized output capacitors of the power supply. the capacito rs get discharged during such an event, which causes a vo ltage dip on the output. the following two examples show typical voltage dips: fig. 25-3 peak load with 2x the nominal current for 50ms, typ. fig. 25-4 peak load with 5x the nominal current for 5ms, typ. 10ms/div output voltage output current 48v 0a 40a 44v 1ms/div output voltage output current 48v 0a 100a 33v 40a peak load (resistive) for 50ms output voltage dips from 48v to 44v. 100a peak load (resistive) for 5ms output voltage dips from 48v to 33v. please note: the dc-ok relay triggers when the voltage dips more than 10% for longer than 1ms. peak current voltage dips typ. from 48v to 44v at 40a for 50ms, resistive load typ. from 48v to 38v at 10 0a for 2ms, resistive load typ. from 48v to 33v at 10 0a for 5ms, resistive load 25.3. e xternal i nput p rotection the unit is tested and approved for branch circuits up to 30a (u.s.a.) and 32a (iec). an external protection is only required if the supplying branch has an ampacity greater than this. check also local codes and local requirements. in some countries local re gulations 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 8a c-cha racteristic breaker should be used. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 23/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25.4. c harging of b atteries this power supply is not recommended to charge lead-acid or maintenance free batteries. the recommended end-of- charge voltage of 55.0v (at 20c) for f our 12v vrla lead-acid batteries in seri es can not be supplied from the qs40.484 unit. 25.5. 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 dc 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 48v 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. 25-5 test circuit maximal wire length *) for a fast (magnetic) tripping: 0.75mm2 1.0mm2 1.5mm2 2.5mm2 c-2a 74m 89m 146m 190m c-3a 57m 79m 128m 163m c-4a 43m 52m 73m 116m c-6a 19m 25m 27m 57m c-8a 8m 12m 17m 25m c-10a 6m 9m 13m 19m c-13a 3m 5m 7m 10m b-6a 38m 52m 76m 113m b-10a 18m 26m 38m 55m b-13a 12m 19m 29m 42m b-16a 6m 8m 12m 20m mcb power supply ac dc + - + - load wire length s1... fault simulation switch s1 b-20a 1m 2m 4m 5m *) dont forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and C wi re). nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 24/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25.6. p arallel u se to i ncrease o utput p ower unit a ac dc unit b ac dc - + - + load + - 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) in single use mode with the same load conditions on all units, or the units can be left with the factor y settings. after the adjustments, the jumper on the front of the unit shall be moved from single use to parallel use, in order to achieve load sharing. the parallel use mode regulates the output voltage in such a manner that th e voltage at no load is approx. 4% higher than at nominal load. see also chapter 6 . if no jumper is plugged in, the unit is in single use mode. factory setting is also single use mode. if more than three units are connected in parallel, a fuse or circui t breaker with a rating of 30a or 32a is required on each output. alternatively, a diode or redundancy module can also be utilized. energize all units at the same ti me to avoid the overload hiccup plus mode. it also might be necessary to cycle the input power (turn-off for at least five se conds), if the output was in hiccup plus mode due to overload or short circuits and the required output current is higher than the current of one unit. 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 paralle l in mounting orientations other than the standard mounting orientation (te rminals on the bottom of the unit) or in any ot her condition where a derating of the output current is required (e.g. altitude, above 60c, ). pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 25.7. 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 th e load in case one power supply unit fa ils. the simplest way is to put two power supplies in parallel. this is called a 1+1 redundancy. in case one power supply unit fails, the other one is automatically able to support the lo ad 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 20a are paralleled to build a 80a redundant system. for n+1 redundancy the same restrictions apply as for in creasing the output power, see also chapter 25.6 . 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 beco mes a load for the other power supplies and the output voltage can not be mainta ined any more. this can be avoided by utilizing redundancy modules, which have decoupling devices (diode s or mosfets) included. further information and wiring configurati ons can be found in chapter 24.3 . recommendations for building redundant power systems: a) use separate input fuses for each power supply. a separate s ource for each supply when possible increases the reliability of the redundant system. b) set the power supply in to parallel use mode. c) monitor the individual power supply units. therefore, use the dc-ok relay contact of the qs40 power supply. d) it is desirable to set the output voltages of all units to the same value ( 100m v) or leave it at the factory setting. nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 25/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25.8. 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 (terminals on the bottom of the unit). pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 25.9. i nductive and c apacitive l oads the unit is designed to supply any kind of loads, including capacitive and inductive loads. if extreme large capacitors, such as edlcs (electric double layer capa citors or ultracaps) with a capacita nce > 1f are connected to the output, the unit might charge the capacitor in the hiccup plus mode (see chapter 6 ). 25.10. 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 63vdc. the absorbin g energy can be calculated according to the built-in large sized output capacitor wh ich is specified in chapter 6 . nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 26/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput 25.11. o peration on t wo p hases 240v +10% max. 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 a llowed as long as the supplying voltage is below 240v +10% . 25.12. 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, 16a; (=80%) lo ad is placed outside the box input: 230vac temperature inside enclosure: 60.1c (i n the middle of the right side of the pow er supply with a distance of 2cm) temperature outside enclosure: 23.1c temperature rise: 37k nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 27/28
qs40.484 q-series 48v, 20a, s ingle p hase i nput nov. 2013 / rev. 3.1 ds-qs40.484-en all parameters are specified at 48v, 20a, 230vac, 25c ambi ent and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 25.13. m ounting o rientations mounting orientations ot her than all terminals on the bottom require a reduction in continuous output power or a limitation in the maximum allowed ambien t temperature. the amount of reduction influences the lifetime expectancy of the power supply. therefore, tw o different derating curves for cont inuous 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. 25-6 mounting orientation a (standard orientation) power supply output input output current 0 10 20 30 40 60c 5 10 15 20a 50 a 1 ambient temperature fig. 25-7 mounting orientation b (upside down) power supply output input output current 0 10 20 30 40 60c 5 10 15 20a 50 a 2 ambient temperature a 1 fig. 25-8 mounting orientation c (table-top mounting) output current 0 10 20 30 40 60c 5 10 15 20a 50 ambient temperature a 1 a 2 fig. 25-9 mounting orientation d (horizontal cw) power supply output input output current 0 10 20 30 40 60c 5 10 15 20a 50 ambient temperature a 1 a 2 fig. 25-10 mounting orientation e (horizontal ccw) power supply output input output current 0 10 20 30 40 60c 5 10 15 20a 50 ambient temperature a 1 a 2 28/28

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