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d a t a s h eet ds_s4 8 s a 1 r 212 _05 12 200 6 delta el ectroni cs, inc. delphi series s48sa, 33w family dc/dc power modules: 48v in, 1.2v/12a out the delp hi serie s s48s a, surfa c e m ountabl e, 48 v input, sin g l e output, isolat ed dc/ dc converte rs ar e the latest offering from a wo rld le ade r i n po we r syst em an d tech nology a nd m anufa c turi ng ? delta elect r o n ics, inc. this pro d u c t family provide s up to 33 watts of powe r or up to 12a of output current (1.8v or below). with creative design techn o lo gy and optimizatio n of compon en t placeme n t, these co nvert e rs pos se ss outstandi ng electri c al a n d thermal p e rfo r man c e, a s well a s extre m ely high re liability unde r highly stressf u l ope rating condition s. all model s a r e p r ote c ted from abno rmal in p u t/output voltage an d cu rrent con d ition s . applic ati o ns telecom/dataco m wir e less netw orks optical net w ork equipment server and d a ta storage industrial/test equipment opti ons positive on/off logic smd or t h rough ho le mou n ti ng featur es high efficiency : 8 4 % @ 1.2v/ 12a size: 47.2mm x 29.5mm x 8 . 35m m (1.86" x 1.16 " x 0 . 33") lo w profile: 0.33 " industr y stand ar d footprint and pin out surface mountab le fixed f r equenc y operation input uvl o , out put ocp, ovp no minimum load required 2:1 input voltage range basic in sulation iso 9001, tl 90 00, iso 14 001, qs9000, ohsa s18001 certified manufacturing fa cility ul/cul 60950 ( u s & canada ) recognized, and tuv (en6 0950) certified ce mark meets 73/23/eec and 93/68/eec direct ive
ds_s48sa1 r21 2_0 512 2 006 technical specificati o ns (t a =25 c, airfl o w rate=300 lfm , v in =48vdc, n o m inal v o u t u n le ss ot her w ise no ted) paramet e r notes and conditions s48sa1r21 2 nrfa min . ty p . ma x . uni t s a b solute m a xi mu m ra tings inpu t vo ltag e continuou s 8 0 v d c transien t ( 100ms) 100ms 100 vdc operati ng temper a t ure refer to figure 18 for mea s uring poin t -40 102 c storage tempera t u r e -55 125 c inpu t/o utpu t isola t i on vol t age 1 minute 1500 vdc input cha r a c teristics operati ng inpu t vol t age 36 48 75 v inpu t under -vol tag e lo cko ut turn-on v o lta ge t h reshol d 32.5 34 35.5 v turn-off v o lta ge t h reshol d 3 0 . 5 3 2 3 3 . 5 v lockout hy stere s i s voltage 1 2 3 v max i mum input cur r ent 100% l oad, 36v in 0.85 a no-load inpu t cur r ent 35 ma off conv erter inpu t curren t 7 m a inru sh cur r ent(i 2 t) 0.01 a 2 s inpu t r e fle c ted - r i p p le c u rren t p-p thru 12h ind u c to r, 5hz to 20mh z 5 ma inpu t vo ltag e rippl e reje ction 120 hz 50 db output ch a r a c teri sti c s outpu t voltage set point vin=48v, io=50% io .max , ta=25 1.17 1.20 1.23 v outpu t voltage re g u l a t i o n ov er load io= i o , m i n to io ,m ax 2 10 mv ov er line vin=36v to75 v 2 5 mv ov er temperature ta=-40 to 8 5 100 300 pp m/ total o u tpu t vol t ag e range ov er sample l oad, l i ne and tempera t ur e 1.15 1.25 v outpu t voltage rip p le and noi s e 5hz to 20mhz ban dw idth peak- t o-pe ak full load , 1f ce ra mic, 10f tan t alum 30 75 mv rms full load , 1f ce ra mic, 10f tan t alum 5 20 mv operati ng outp ut current range 0 12 a o u t p ut dc cur r e nt -l i m i t i n c e pt i o n outpu t voltage 1 0 % low 13.2 15.6 18 a dyn a m i c ch a r a c teri sti c s outpu t voltage cur r ent transi ent 48v, 10f tan & 1 f ceramic load ca p, 0 . 1a /s posi tiv e step chan ge in ou tput curre nt 50% io,max to 75% io ,max 35 100 mv negativ e step cha nge in ou tpu t curr ent 75% io,m ax to 50% io .m ax 35 100 mv settling time to 1 % of final v a lue 200 s turn-on tran sien t star t-u p t i m e , f r o m on/ o f f c o n t rol 6 12 m s star t-u p t i m e , f r o m inpu t 6 12 ms max i mum output c apaci t an ce full load ; 5 % ov ershoot of vou t at star tup 2200 f effi ci ency 100% l oad 82 84 % i s o l at i o n c h ar ac t e r i s t i c s isol atio n vo ltag e 1500 v isol atio n re sistan ce 10 m ? isol atio n capa ci tan c e 1500 pf fe a t ure ch a r a c teri sti c s sw itching fre quen cy 330 kh z on/off control, (l ogic low -module o n ) logic low von/o f f a t ion / off=1.0ma 0 0.8 v logic high von/o f f a t ion / off=0.0 a 15 v on/ o ff curren t ion/off a t von / off=0.0v 1 ma leakage curre nt logic high, vo n/o f f=15v 50 ua outpu t voltage tri m range a c r os s trim pin & +vo or ? vo , p out Q max rat e d -10 +10 % outpu t ov er-voltag e pro t e c tio n (hiccup ) ov er full temp rang e; % o f nominal vo ut 115 125 160 % genera l specifica t ions calcula t ed mtbf io=80% of io, max ; tc=40c tbd hours we ig h t 1 8 g r a m s ov er-temperature shutdow n refer to figure 18 for mea s uring poin t 115 c 2
ds_s48sa1 r21 2_0 512 2 006 electri cal characteristics curves 50 55 60 65 70 75 80 85 90 123 456789 1 0 1 1 1 2 o u t p ut curre nt ( a ) e fficie ncy (%) 36vin 48vin 75vin 0. 0 0. 5 1. 0 1. 5 2. 0 2. 5 3. 0 3. 5 4. 0 12 3456 789 1 0 1 1 1 2 o u t p ut curre nt ( a ) pow e r d i ssipation ( w ) 36vin 48vin 75vin figure 1 : e f f i c i enc y v s . load c u r r ent f o r mi ni mu m, no m i na l, and max i mu m in put voltage at 2 5 c. f i g u r e 2 : pow e r dissip a tio n vs. lo ad c u rrent for min i mu m, no min a l, an d max i mu m in put voltage at 2 5 c. 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 30 35 40 45 50 55 60 65 70 75 i n pu t vo l t ag e ( v ) inp u t curre nt (a ) io = 1 0 a io = 6 a io = 1 a figure 3 : t y pi cal inp u t chara c teristics at roo m te mper ature. f i g u r e 4 : t u rn-on transi ent at full rated lo ad current (1 ms / d iv ) . t op t r ace: vo ut (500mv/ div) ; bottom t r ace: on/of f control (5v/div). 3
ds_s48sa1 r21 2_0 512 2 006 4 electri cal charact eristics curves figure 5 : t u rn- on transie nt at z e r o loa d curre nt (1 ms/div). to p t r ace: vout (500 mv/d iv); bottom trace: on/off control (5v/div). f i g u r e 6 : output voltag e re spons e to step-cha nge i n l oad current (5 0%-7 5% of io, max; di/dt = 0.1a/ s ) . load c ap: 1 0 f , 100 m ? ? esr t antal u m capac itor and 1 f c e ra mic cap a cit o r. t op t r ace: vout (20mv/div), bottom t r ace: iout (5a/div). figure 7 : output volta ge r e spons e to ste p -cha nge in l oad current (75 % - 50% of io, max; di/dt = 0.1a/ s). l oad cap: 1 0 f , 1 0 0 m ? ? e s r tantal u m c apacit or an d 1 f cera mic capac i t or. t op t r ace: vout (2 0mv/d i v), botto m t r ace: iout 5a/div). fig u re 8 : t e st set-up diagra m show ing me asure m e n t poi nts for input reflec ted rip ple c u rr ent (f igure 9). note: meas ure d inp u t reflecte d-ripp le curr ent w i th a simu lat e d source induct ance (l test ) of 12 h. capacitor cs offset possib l e b a ttery imp e d ance.
ds_s48sa1 r21 2_0 512 2 006 electri cal characteristics curves strip copper vo(-) vo(+) 10u 1u scope resistiv e load figure 9 : input reflected rip ple curre nt, i s , at full rated ou tput current and no mi nal i n p u t volt age w i th 12 h source impedance and 3 3 f el ect r olytic cap a cito r (2 ma/div). f i g u r e 1 0 : output voltage n o i se and ri ppl e me asure m ent test setup. sco pe me asure m ent shoul d b e ma de us ing a b n c cable (le ngth shorter t h a n 20 i n ch es). positio n the l o a d betw een 5 1 mm to 76 mm ( 2 inch es to 3 inches) f ro m t h e mo dul e. 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 1. 2 1. 4 0. 0 2 . 0 4. 0 6 . 0 8. 0 10. 0 12. 0 14. 0 16. 0 l o a d curre nt (a ) o u tput vo ltag e ( v ) v i n= 48v figure 1 1 : ou tput voltage ripple at nom inal input voltage and rated lo ad curr ent (10 mv/d iv ). load c apac itance: 1 f c e ra m i c capacit or and 10 f tant alu m capacit or. ban d w i dth: 20 mh z . figure 1 2 : output voltag e vs. load curre nt show ing typic a l current li mit cu rves and co nve r ter shutdow n points. 5
ds_s48sa1 r21 2_0 512 2 006 this po we r module i s no t internally fused. to a c hi eve optimum saf e ty and system prote c tio n , an input line fuse i s hi gh ly recomme nded. t he safety age n c ie s requi re a no rmal-bl o w fuse with 3a maximum rating to be install ed i n the ung rou nded le ad. a lowe r rate d fuse can b e used base d on th e maximum inru sh tra n si e n t energy and m a ximum input current. soldering and cleaning considerations post solde r cl eanin g is usu a lly the final board assem b ly pro c e s s bef ore th e bo ard or syst em undergo es electri c al te sting. inadeq uate cl eanin g and/o r d r ying may lowe r the reli ability of a powe r modul e a n d severely affect the finishe d circuit bo ard assembly t e st. adequate cl e aning and/o r drying is esp e cially import ant for un -en c a p s ulate d an d/or o pen fra m e type po wer module s . for assi stan ce on app rop r iat e sold erin g a nd clea ning p r o c ed ure s , ple a se co ntact delta? s techn i cal sup port team. design considerations input sourc e impedance the imp eda n c e of the inp u t sou r ce co nne cting to the dc/ dc p o we r modul es wi ll intera ct with the modul es and affe ct the sta b ility. a low ac-i mped an ce i nput sou r ce is re comm end ed. if the source indu ctan ce is more than a few h, we a d vise addi ng a 10 to 100 f elect r olytic capa citor (es r < 0.7 ? at 100 khz) mounte d clo s e to the input of the module to improve th e stability. lay out and emc considerations delta? s dc/dc po wer m o d u les a r e de si gned to op erate in a wide variety of systems and a pplication s . for desi gn assi stance with emc com p lian c e and relat e d p w b lay out issue s , ple a se c ont a c t delt a? s t e chn i cal sup p o r t team. an exte rnal in put filter modul e is available fo r ea sie r emc comp liance de si gn. application n o tes to assi st desig ne rs in addre ssi ng these i s sue s are p endi ng relea s e. safet y considerations the power m odule mu st be installed in compli an ce with the spa c in g and sepa rati on req u ireme n ts of the end- use r ?s safety agen cy sta n d a rd if the syst em in whi c h t he power mod u l e is to be used must mee t safety agency requi rem ents. whe n the input source is 60vdc or below, the powe r module m e ets selv (safety e x tra-lo w voltage) requi rem ents. if the input s ource is a h a z ardou s volta g e whi c h i s grea ter than 6 0 v d c a nd le ss t han o r eq ual to 75 vdc, for the module?s output to meet selv requi rem ents, all of the followin g must b e met: the in put source m u st be in sulat ed from an y hazard o u s voltage s, incl uding the a c mains, with reinforced insulation. one vi pin a nd one vo pi n are g r ou nd ed, or all the input and o u tput pins a r e kept floating. the input terminals of the module are not operato r acce ssi ble. a selv reliability test is conducted on the syste m whe r e the m odule i s use d to ensu r e that under a singl e fault, hazard o u s voltage do es not appe ar a t the module? s output. do not gro u n d one of the input pins without grou nd ing one of the output pins. this con n e c tion may allow a non- selv voltage to appea r betwee n the output pin and grou nd. 6
ds_s48sa1 r21 2_0 512 2 006 vo(+) vi(+) vo(-) sense(-) sense(+) vi(-) on/off figure 13: r e mote on /off imple m entation remote sense (option a l) rem o te sen s e co mpe n sates for voltage drop s on the output by se nsin g the a c tual output vo ltage at the p o int of load. the vol t age bet wee n the remote sense pin s an d the output termi n als m u st n o t exce e d the o u tput voltage sen s e ran ge given h e re: [vo(+) ? vo(?)] ? [sense(+) ? sense(?)] 10% vout this limit incl ude s any increa se in voltage du e to remote sen s e co m pen sation a nd outp u t voltage set point adju s tment (trim). vi(-) vi(+) vo(-) vo(+) sense(+) sense(-) resistance contact contact and distributio n losses figure 1 4 : effective circu i t config uratio n for re mote sens e oper ation if the remote sen s e featu r e is not used to re gulat e the output at the point of loa d , plea se co nne ct sense(+) to vo(+) an d sense(? ) to vo(?) at the mo dule. the output voltage can b e incr ea sed by both the remote sen s e and th e trim; ho wev e r, the maxi mum in crea se is the larg er of either the remote s ense or the trim, not the s u m of both. whe n usi ng remote sen s e and trim, the output vol t age of the mod u le i s usu a lly incre a se d, whi c h i n crea se s the powe r output of the modul e with the sa me outp u t current. ca re shoul d be take n to ensur e that the maximum output power d o e s n o t exceed the maximum rat ed po we r. 7 features descriptions over-cu rre nt protectio n the modul es include a n inte rn al outp u t over-curre nt prote c tion ci rcuit, whi c h will endure cu rrent limiting for an unlimited duration d u r ing outp u t overlo ad. if the output curren t exceed s the ocp set poi nt, the modul es will autom atically shut down (hi c cup mode). the modules will try to rest art after shutdown. if the overload condition still exi s ts , the module will shut down again. thi s resta r t trial will continue u n til the overload con d ition is correcte d. over-volta ge protection the mod u le s include a n intern al outp u t over-volta ge prote c tion ci rcuit, which monitors the voltage on the output termi nals. if this voltage excee d s th e o v er- voltage set point, the module will sh ut down (hiccup mode ). the modul es will t r y to re start a fter sh utdo wn . if the fault cond ition still exists, the module will shut do wn again. thi s re start trial will contin ue until the fault con d ition is correcte d. over-temp e rature pro t ection the over-te m perature protecti on con s ist s of circuitry that provide s protectio n from thermal dama ge. if the temperature excee d s the ov er-tem perature thresh old the modul e will shut do wn. the module will try to rest art after shut down. if the over- temperature condition still exists duri ng restart, the modul e will shut do wn again. thi s re start trial will contin ue until the temperat ure i s within specifi c ation. remote on /off the remote o n /off feature on the mo dul e ca n be eith er negative o r positive logi c. negative logic tu rn s the modul e on du ring a lo gic lo w and off du ri ng a logi c hig h . positive logi c turns the m odule s on du ring a lo gic h i gh and off duri n g a logic lo w. rem o te on/off can be cont rolle d by an external swit ch betwe en the on/off termin al and the vi (-) termin al. the swit ch can be an open coll ecto r or op en drain. for n egative logic if the re mote on/of f feature i s not use d , please short the on /off pin to vi(-). for positi v e logic if th e remote o n /off feature i s n o t use d , ple a se leave the on/ off pin floating.
ds_s48sa1 r21 2_0 512 2 006 perce ntage o u tput voltage cha nge v o % is defined as: [] ? ? ? = ? 62 % vo up ? ? + 1089 %) 100 ( 9 . 15 vo x . w h e n t r i m - u p +10% (1.2v x 1.1 = 1.32v) rtrim e [] ? = ? = ? 4 62 10 up ? + 1089 ) 10 100 ( 9 . 15 ca re sh ould be taken to ensu r e th at the maximum e a t u r e s d e s c r i p t i o n s ( c o n . ) e s e t p o i n t , t h e rtrim output po wer of the module rem a in s at or belo w the maximum rat ed power. f u t p u t v o l t a g e a d j u s t m e n t ( t r i m ) o o i n c r e a se o r decre a s e t h e o u t p u t v o l t a g t modul es ma y be connected with an external re si s t o r betwe en the trim pin an d either th e vo+ o r vo -. the trim pin sho u ld be left op en if this feature i s not use d . f i g u r e 1 5 : cir cuit configur ati on for tr im-dow n (decreas e ou tput t e r n al re si stor i s con n e c ted b e twee n the t r im voltag e) t h e e x i f and vo- pin s , the output voltage set point decrea s es. the externa l resisto r value re quire d to obtain a perce ntage o f output voltage ch ang e vo% is def ined as: [] ? ? ? = ? 62 % vo down 1089 x . w h e n t r i m - d o w n ? 1 0 % (1.2v x 0.9 = 1.08v) rtrim e [] ? = ? = ? 9 . 46 62 10 1089 down rtrim f i g u r e 1 6 : circuit config urati on fo r trim-u p (i ncreas e output t h e e x t e r n a l resi sto r is conne cted bet wee n the trim voltag e) i f and vo+ pin s , the output voltage set point increa ses. the externa l re sisto r value req u ire d to obtain a 8
ds_s48sa1 r21 2_0 512 2 006 9 therm a l consi d erations thermal man agem ent is a n im porta nt part of the syst em desi gn. to e n su re prope r, relia ble ope ration, sufficie n t cooli ng of the powe r mod u le is need e d over the entire temperature range of the modul e. co n v ection cooli n g is usu a lly the domina n t mod e of heat tran sfer. hen c e, the choi ce of eq uipme n t to c haracte rize the thermal pe rf orma nce of the power m odule is a wind tunnel. thermal testing setup delta? s dc/dc p o wer modul es a r e characte ri ze d in heated ve rtical win d tunn els that simu late the thermal enviro n ment s enco untered in mo st electroni cs equip m ent. this type of equi pment comm only u s e s vertically mo u n ted ci rcuit card s in ca bin e t ra ck s in wh ich the power mo dule s are mo unted. the followi ng figure shows the wind tunnel c h ar ac te r i z a tio n se tu p . t h e p o w e r modu le is mo un te d on a te st p w b an d is vertically po sitioned withi n the wind tu nnel. the spa c e b e twee n the n e ighb ori ng p w b and the top of the power m odul e or a heat sink is 6.35mm (0.2 5?). thermal derating heat can be removed by in cre a si ng airflo w over the modul e. figure 19 sho w s maximum output is a function of ambient tempe r atu r e and airflo w rate. to enha nce system reli ab ility, the power modul e sh ould always be ope rated b e l o w the maxi mum ope rati ng tempe r atu r e. if the tempera t ure excee d s the maximum modul e temperature, reliability of th e unit may be affected. not e : w i n d t u n n el t est s e t u p fig u re dim e nsio ns a r e in m i llim ete r s and (in c h es) 10 ( 0 .4?) modu l e a ir fl o w 50.8 ( 2. 0 ? ) f a cing p w b pw b a i r ve l o cit y a n d am bi e n t t e mpe r at u r e me as u r ed b e lo w t h e m o dul e figure 1 7 : w i nd tunne l test setup therm a l curves s 48sa 1 r212(standard) o u tput current v s . a m bi ent tem peratur e and ai r ve loc i t y @ vi n = 48v (ei t h e r o r i e nation) 0 2 4 6 8 10 12 14 65 7 0 75 80 8 5 90 95 1 0 0 105 a m bi e n t temp era t ur e ( ) o u tput c u r r en t(a ) na t u ral c o nv ec t i on 1 00lf m 200l fm 300lf m 40 0lfm 500l fm 6 00lf m figure 1 9 : output current vs. ambie n t tempe r ature an d air v e locit y @ v in = 48v figure 1 8 : hot spot temp erat ure meas ured point t he all o w ed max i mu m hot s pot temperatur e is defin ed at 102
ds_s48sa1 r21 2_0 512 2 006 10 pick and place location surfac e-mount tape & reel recommended pad layout (smd)
ds_s48sa1 r21 2_0 512 2 006 11 leaded (sn/pb) process recommend temp. profile t i m e ( s e c. ) p r e- heat t e m p . 140~180 c 60~120 sec. p eak t e m p . 2 10~230 c 5sec. ra mp- up te mp. 0.5~3.0 c / s ec. t e m p er at ur e ( c ) 50 10 0 15 0 200 250 300 60 0 1 20 180 240 2 nd ramp-u p temp. 1. 0~3 . 0 c / s ec. o v er 200 c 40~50s ec. c ooling do wn rate <3 c / s ec. note : the te mpe r a t ure re fe rs to the p i n of s4 8 s a, me asure d on t h e pi n +vo u t j o int . lead free (sac) pro c ess re commend temp. profi l e temp . ti me 15 0 20 0 10 0~14 0 s e c . t i me lim i te d 9 0 sec . ab ov e 21 7 21 7 pr eh e a t ti m e ram p up ma x. 3 /s ec . ram p dow n ma x. 4 /s e c . peak tem p . 24 0 ~ 24 5 25 note : the te mpe r a t ure re fe rs to the p i n of s4 8 s a, me asure d on t h e pi n +vo u t j o int .
ds_s48sa1 r21 2_0 512 2 006 mechanical drawing surface-mount module through-hole module pin no. na me func tio n 1 + v out positive o u tput voltage 2 -vout negativ e outp u t voltage 6 t r im output voltag e trim 8 o n / o f f on/off l o g i c 11 -vin negativ e in put voltag e 12 + v in positive i nput v o ltag e optio n a l pi n na me func tio n 4 + s ense (optio n) positive se nse pin 5 9 -sense (optio n) nc negativ e sens e pin n o co nn e c ti on 12
ds_s48sa1 r21 2_0 512 2 006 part numbering system s 4 8 s a 1 r 2 1 2 n r f a* form f acto r input vo ltag e number of outputs produc t series output voltage output current on/off logic pin ty pe optio n code s- small pow e r 48- 48v s- single a- advanced 1r2-1.2v 1r5-1.5v 1r8-1.8v 2r5-2.5v 3r3- 3.3v 050- 5.0v 120- 12v 03- 3.0v 06- 6.6a 10- 10a 12- 12a n- negative p- positive r- smd t-th rough hole f- ro hs 6/6 (lead f r ee) a- 9 pins, no sense b- 6 pins, no sense c- 9 pins w i th sense (12v has option b onl y ) * op tio n co de a i n cl udes 9 pin s . pins 4, 5, and 9 ha v e no c o n n ectio n . op tio n co de b e xclude s pi n 4, 5 , an d 9 ( t o t al 6 pins ). op tio n co de c f eatures 9 pin s w i th sense f unc tion. model list model name input outp ut eff @ 100 % load s48sa1r212nr f a 3 6 v ~ 7 5 v 0 . 8 5 a 1 . 2 v 1 2 a 8 4 . 0 % s48sa1r512nr f a 3 6 v ~ 7 5 v 0 . 8 5 a 1 . 5 v 1 2 a 8 8 . 0 % s48sa1r812nr f a 3 6 v ~ 7 5 v 0 . 8 5 a 1 . 8 v 1 2 a 8 8 . 0 % s48sa2r510nr f a 3 6 v ~ 7 5 v 1 . 3 a 2 . 5 v 1 0 a 8 8 . 5 % s48sa3r310nr f a 3 6 v ~ 7 5 v 1 . 3 a 3 . 3 v 1 0 a 9 0 . 5 % s48sa05006nr f a 3 6 v ~ 7 5 v 1 . 3 a 5 . 0 v 6 . 6 a 9 0 . 5 % s48sa12003nr f b 3 6 v ~ 7 5 v 1 . 3 a 1 2 v 3 . 0 a 9 0 . 0 % cont act: www.delta. com.tw / d c d c us a : t e lephon e: east coast: (888) 33 5 82 01 w e st coast: (888) 33 5 82 08 f a x: (97 8 ) 656 396 4 email: dcd c @ delta-c orp.co m europe : phon e: + 41 31 998 5 3 11 f a x: + 41 31 9 9 8 53 53 email: dcdc@delta- e s.com a s i a & the re st of w o r l d: t e lephon e: + 886 3 45 26 107 ext 6 220 f a x: + 886 3 4 5 134 85 email: dcdc@delta.com.t w warra nt y delta offers a two (2 ) year limited wa rra nty. compl e te warra n ty informatio n is listed on ou r web site o r is availabl e upon req u e s t from delta. information f u rni s hed by delta is believed to be accurate a nd reli able. however, no respon si bility is assumed by delta for its use, no r for any infri n geme n ts of p a tents or othe r ri ghts of thir d pa rties, whi c h m a y re sult from its u s e. no li ce nse is g r ante d by implication o r othe rwise u nde r any pat ent or pate n t right s of del t a. delta re s e rv e s the rig h t to rev i se these spe c ifications at any time, without notice. 13

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