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CA RD (Zener Regul a ted Powe r S uppl y)
48
125
2 5 0
Th i s ca rd fu nct i o n s a s a s i n g l e - ra ted zen er- regu l a ted +10. 2 VDC, -10. 2 VDC power
s uppl y.
The o hm i c v a l u e o f R6 ( exte rnal to ca rd ) changes to prov i d e s i n gl e ba t te ry
vol tage ra t i n gs o f 48V, 125 V, 25 0V.
No te t h a t fo r i npu t con n ec t i on s , ( + ) ra ted DC a nd ( - ) DC a re co n n ected to P i n s #10
a n d #6 re spect i ve l y.
R6 i s t h e d ropp i n g re s i s to r t h a t cha nges o hm i c v a l u e a s t h e D C ra t i n g cha nges.
The c i rcu i t ry a s soc i a ted w i th Q1 a nd Q2 s uppo r ts the l ev e l sen se swi tch i n g fu nct i o n.
Q1 i s the i nput to sw i tch Q2.
d i v i d ers
acro ss
fu l l
tempe ra t u re ch a racte r i s ti c i s comp e n s a ted by t h e base em i tte r junct i o n o n Ql.
en s u re s tempe ra tu re s tabi l i ty.
When t h e vol ta g e a t t h e ba se o f Q1 exceeds 6 . 8 vol ts, Q1 t u r n s on a nd pu l l s down t h e
b a s e o f Q 2 .
Th i s a l l ows cu r re n t t o fl ow t h ro u g h Q 2 a nd c h a r g e C 2 t o the zen er
re g u l a ted 20. 4 vol ts a t Pi n #3.
Zen e r d i od e s ZD4 a nd ZD5 a re the +10 . 2 v o l t r e g u l a to rs, a nd ZD6 a nd ZD7 a re the -
10. 2 vol t regu l a tors.
The a nod e of ZD5, commo n w i t h the ca thod e of ZD6, pro v i d e s rel ay ci rcu i t re fe re nce.
The a n ode o f ZD7 s uppl i e s - 10 . 2 vol ts to the rel ay c i rcu i ts.
reg u l a ted DC r i pp l e f i l te r.
Res i s to r R6 e n s u re s powe r supp l y l o ad bal a nce d u r i n g th e tra ns i e n t e n e rg i za t i o n o f
t h e power s uppl y.
uzu
CARD ( Co n tact Co n v e r te r Ca rd)
Th i s ca rd fu nct i on s as a s i n gl e - ra ted con tact con v e r te r ca rd.
o f the con tact exte rnal to the S B C prov i des for cl o s u re o f the e l ectr i ca l l y- i sol a ted
CC1 co n tact w i th i n the re l ay.
vol ta ge l ev e l fo r compa t i bl e l o g i c s ta te.
A jumper on t h e card mu s t be i n se rted on t h e co rrect po s t co rre spo nd i n g to the DC
ra t i n g o f the rel ay.
o f 48/125/25 0 VDC.
s uppre s s o r to the tran s i e n ts dev e l oped upo n d e - e n er g i z i n g the CC1 ca rd.
The re l ay s h ou l d be te s ted u s i n g pu re DC, a nd n o t me re l y ful l -wa v e rec t i fi ed powe r.
Un l e s s the rect i fi ed s uppl y i s wel l fi l te red, the rel ay may n o t ope ra te p roperl y d u e
t o t h e d i ps i n t h e rec t i fi ed powe r.
these d i ps.
As a gene ra l
r i ppl e.
GEK-45464
Exercise caution if testing while relay is energized.
Q1 se rves as the l e vel d e tector.
ba ttery vol tage.
The ca th ode o f ZD4 s uppl i e s 10. 2 vol ts to the rel ay ci rcu i ts.
CCl co n tact s ta te is s ubsequ e n t l y tra n s l a ted to a
The GE a s sembl y, 0183 B2 304G4, s h own i n F i gu re 33 has a ra t i n g
The d i od e DZ1 a nd re s i s to r RZ4 comb i n a t i on fu nct i o ns a s a su rge
Ze n e r d i od es, fo r exampl e, c a n t u r n o ff d u r i n g
r u l e, the D C s o u rce s h o u l d n o t con ta i n more than 5 %
GE Ass embl y
0183B8058G1
0183B8058G2
P183B8058G3
ZD1
is
a
6. 2
19
3 2
3 2
3 2
R1, R2 a re vol ta ge
vol t zen e r
d i ode
Capac i tor C2 i s the
In practi ce, cl o s u re
who se
Th i s
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