M632 — Power Supply

Regulated Output

Outpu t Voltoge ' +25 volts de at loed currents from 0 to 3 o mpe res .

Line Regulatld'n , 0 .25~ for lin e vari ation s f rom 105 to 125 volt s

Lo od Regul ation , 0. 1~ for load vorlotlon s from zero to full loed .

Ripple o n d Noi s e: Le u th on SOO micro volt s RMS for oil lood condition s sp eci fied a b o ve .

I n te r na l Imped once, Le s s than 0 .05 ohm from dc to 20 kH z .

St obility , 0 . 1 volt me a sured ov er an 8 hour p eriod, after 30 minut e s warmup .

Prot ection, Ov ercurrent a n d s ho r t circuit fo l d b o ck . Ov er- volt age crowbar .

Unregul at ed Ou tput

OUtput Volt ag e, +3 2 volt s de +/- 10'1 nominal a t loe d curren ts from 0 to 2 amp ere s, a t 1 15 volt s a c input .

Rippl e : Le s s th an 1 volt RMS a t 2A lo ad .

AC Input: 105 to 125 vol ts a c , 60 Hz, 100 VA maximum .

Ambient Temp ero lure , 0 to 40 d eg r ee s Cel siu s . a .c

Dimen sions' 5 .1" wId e " 3 .4 " high" 13 .7" de ep ps

(130 mm x 86 mm .. 348 mm) . BS

W!ig ht: 8 .8 lb . (4 kg). W :// tp ht

CIRCUIT DESCRIP TION

Tne M632 powe.. . ...ppl y I.....eel p .. I...... l l y i n In l e rcom sy.,..... "'llli >:lng l he M70JB and 1147 128 In lercom mod... le • •

T ne p r i ma r y wind i ng of Ine powe r I..ansforme.. T 10l I. de.l gned for op e ..a llon from a 115 v eu a c, 60 H>: l ine.

Br ld ge r ecl i' i e .. CRIOI and fi lte .. capacllor C IOI follow In e 'e<;:on d a .. y t ..an sfo..me .. winding . T n e unreg ulated c c OUlpul I. b ,.ought ou t a l P :Z, pin . 5 &< 6 afte,. pa ning t n ro u g n fu.e Fl 0:Z.

A .econd p ain or lginallng aline ree ll fl e ,. OUlput Is fed vi a fu se FIOJ , p an t,. an. I. lor CIOI a nd re. l.to r R I OI 10 t he .. eg ulaled OUlp ...1 al P:Z. p i n . 7 &< 8.

Tne LEO " power on" i n dlea lor 05101 I. <;Qnn e<;:le d aeros . In e regu laled r- ou tpu l vo lta ge .

Tne p .. lmary v o l l a g e ..eg ul alor e lre...11 a s wa ll a. Ine ov erv o lt a g e crowbar protec t ion Circu it a ..e conlalned on t n e 9_1 CJ.4 ..egul ato.. ee ..d .

UI I. t h e ba.lc In leg .. ated c l n:: u l t regu la tor wnlcn contains t n e r equ l ..ed ..er e ..enclng vollage and amp Ilfe,.• . Tne l rvte.. nal refe~nce v o l ta ge i ,. compa~d wltn a por l lo n of t h e 25 volt ..egulated OUl pu t vi a vo l t a g e d i v ider R8, R9 and R IO. A ~.u l tanl erl"Ol' v o l l age app ea,.. at p in 2 o f U1 d r i v ing l he cu r~ 1 boo. te .. t ..a n.Islor 01 . The co llec lor OUlput o f Cl dri ve. the ma in e"lerna l se.. ie. p a n t ..a n ,. l ,.t or 0 10 1 . If ..emo te ......In g of t he 2S volt loa d v o ll a g e i . req...l red ClJt jUft'li:le.. Jl a nd e eeeeer P:Z p i n 1 w l t n a sepa ..ate ...... ,.e wl ..e to t ne lo ad dl " e<;:tl y .

Ul c ont a in s In te .. nal currenl limit i ng and fol d b a c k c lrc u l l S. Tn e volta ge drop developed acro, ,. Rial Is fed to UI pin 1, vi a vol lage divide .. R4/R 5. Wn en tne s u p p l y c u r-r en t reacn es IIppro"lma tely 3 . 7 ampe ..e s, foldback eu .... ent l i m it ing se ll In . With th e .upp ly ou tput st'lo.- te d , tn e c u .... en l I,. l i mi te d 10 0.5 a mpe " es ma"lm...m . a

Ov e rv o l tage p rotec t i on i. provi d e d b y ' erowb a .. ' SCR 0 2 . Tn e s ens i n g .c

network c on s i s t s o f CRJ. C6 , R ll and R 12. StIould l he outpu t v o l l a 'jle ps

r i s e to app ro x l.... l e l y 27 volts due to brea k down o f a n y o f 1M BS

regu l Uor compon en lS , 0 2 w ill fi,.. a nd th...s s.tlor- t -cin:: u lt the p o we .. supply ..esu lt ln g In In e blo wing of f u se FIOJ. W ://

M632 _POWERSUPPLY Regulated Qutput Output Voltage: +25 volts dc at load amperes currents from Line Regulation: 25% for Iine variations from 105 ac 125 volts Load Regulation: 0.1% for load variations from zero full load. Ripple and Noise: Less than 500 microvolts RMS for all Iine and load conditions specified above Internal Impedance: Less than 0.05 ohm from kHz .

Stability: volt measured over an minutes warmup. hour period, after Protection: Overcurrent and short circuit foldback. Over- voltage crowbar. Unregylated Qutput Output Voltage: +32 volts dc +/- 10% nominal Ioad currents from amperes, 115 volts ac input. Ripple: Less than volt RMS load. AC Input: 105 125 volts ac, 60 Hz, 100 VA maximum. Ambient Temperature: degrees Celsius. Dimensions: wide 3.4" high 13.7" deep (130 mm Mm 348 mm) Weight: 8 .

8 Ib. kg) 1-1