GE SBC23A Instructions Manual page 18

The B/0 t i mer ope ra tes i n the same mann e r a s the A/0 t i mer, but the co l l ector o f Q8
i s t i ed to the co l l ecto r o f Q4 ( A/0 ) to fo rm a n O R g a te funct i o n to d r i v e Q5 a nd the
output reed rel ay.
11 C11 CARD ( M i s ce l l a neous Funct i o n Card )
0165B4686 G1 ( SB C2 3 A):
pro v i ded by a reed rel ay.
P i n # 2 . T h e output i s a reed rel ay no rma l l y-open co n tact acro s s P i n s #12 a nd #13 .
Wi th zero s i g n a l a t TP5, Q3 i s O ff, Q5 i s O ff, a n d Q6 i s O ff, thus keep i n g 11lT11 de­
When TP5 goes po s i t i v e, Q3 , Q5 a nd Q6 w i l l turn On a nd 11lT 1 1 be g i n s to
e n e rg i zed.
co n duct current.
a s soc i a ted co n tacts w i l l be cl o sed.
0165B4686 G3 ( SB C2 3 B a nd S B C2 3 C):
The i npu ts fo r the AND ci rcui t a re P i n s #5 a n d #6.
s i gn a l at e i t h e r P i n #5 or #6, Q1 o r Q2 i s O f f, thus hol d i n g Q4 On, w i t h TP3 or Pi n
#15 l ow. I f o n l y o n e o f the t ran s i s to r s ( Q1or Q2 ) i s d r i v e n On, Q4 rema i n s On.
both Q1 a nd Q2 a re d r i v e n On, Q4 w i l l d rop out o f sa tura t i o n, a l l ow i n g TP3 or Pi n
#15 s i gn a l to appe a r, th roug h R18.
The O R c i rcu i t i nputs a re p i n s #3 a nd #4.
S i g n a l p re s ence a t P i n s #3 or #4 i s transmi tted th roug h D1 o r D2 respect i v e l y to
yi el d output at TP4.
The con tact co n v e rte r i nput i s P i n #8.
co n tact o n t h e SB C
by re s i s to r R16.
output vol tage i n acco rda nce w i th re s i s to r d i v i d e r R15, R16, a nd l oa d res i s ta nce.
The 11 I T11 funct i o n ope ra tes t h e same a s i n the G1 ca rd.
11 X 1 1 CARD ( Quad Ful l -Wa ve B r i dge)
0165B47 96 G1 ( Fi gure 31 ) :
This card functi ons
t ran s actor s eco n d a ry c i rcu i ts.
Phase
�
IB
I C
3Io
No te tha t the th ree ( 3 ) p h a s e outputs a re l o g i ca l l y 11 0R'ed11 o n th i s boa rd a t output
Pi n #9. In s ho rt, th i s mea n s t h a t t h e ph ase vol ta ge o f g re a t e s t ma g n i tude i n t i me
w i l l preva i l a t output P i n #9.
The I n s ta n ta neous Tr i p ( I T )
( S ee Fi gure 2 9.)
Wi th i n 1. 0 mi l l i s econd, 11 IT"
AND, OR Contact Co n v e r te r, 11lT11 ( See F i gure 30. )
nzn
card ) , TP7 a nd output P i n s #17 a n d #18 a re t i ed t o re fe re nce
When t he CC1 co n tact i s cl o s ed, TP7 a n d t h e output po i n ts y i e l d
as a ful l -wave
The i npu ts and outpu ts a re
Re fe rence i s P i n #11
GEK-45464
funct i o n o n th e 11 C11 card i s
The i nput for t h e 11lT funct i o n i s a t
w i l l be ful l y e n e r g i ze d a nd the
The output i s P i n #15.
Pi n #14 o r TP4 i s the a s soc i a te d output.
When t h e C C1 co n tact i s open ( C C1 i s a ree d
br i d ge fo r the
#1, #2
#3, #4
#5, #6
#7, #8
18
For zero
th ree -ph a s e a nd r e s i dua l
noted bel ow:
PIN # 9
PIN #9
PIN #9
PIN #10
I f