elektronik industri exam paper
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7/28/2019 Elektronik Industri Exam Paper
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UNIVERSITI TUN HUSSEIN ONN MALA YSIA
FINAL EXAMINATION
SEMESTER I
SESSION 2009/2010
S U B J E C T N A M E I N D U S T R I A L E L E C T R O N I C S
S U B J E C T C O D E
C O U R S E
E X A M I N A T I O N D A T E
D U R A T I O N
I N S T R U C T I O N
D E K 3 1 1 3
3 D E E / D E X
N O V 2 0 0 9
2 '/ 2 H O U R S
A N S W E R S F O U R ( 4) Q U E S T I O N S
O N L Y .
THIS PAPER CONSISTS OF 9 PAGES
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D E K 3 1 1 3
QL. ( a ) Give s imi l a r i ty be tween s o leno id and r e l ay .
( 3 m a r k s )
( b ) B a s e d o n F i g u r e Q l ( b ) :
( i ) Exp la in the opera t io n o f F igu re Q l (b ) dur ing de-energ ize and
energ ize s t a t e .
( 5 m a r k s )
( i i ) Giv e func t ion o f 15A fus e in the s ys t em .
( 2 m a r k s )
( c ) ( i ) G i v e t w o m e t h o d f o r i m p r o v e m e n t o f so l e n o i d c o n s t r u c t i o n .
( 3 m a r k s )
( i i ) Ex p la in one o f t he me thod fo r imp rove me nt o f s o l eno id
c o n s t r u c t i o n w h i c h n e e d s g r a p h i c a l d i a g r a m t o e x p l a i n .
( A p p r o p r i a t e d i a g r a m n e e d t o b e i n c l u d e d )
( 5 m a r k s )
( d ) F i g u r e Q l ( d ) , s h o w s o n e o f t h e m e t h o d t o p r o l o n g e d t h e li f e t i m e
for s wi t ch o f t he r e l ay .
( i ) Exp la in the opera t ion o f F igure Q1 (d ) wh en t r ans i s to r i n " on "
& " o f f ' c o n d i t i o n .
( 4 m a r k s )
( i i ) W h at wi l l happ en whe n d iode i s no t ex i s t .
( 3 m a r k s )
Q 2 . ( a ) W hen s ens or S I s ens es a con ta iner , a pneumat i c opera t ed va lve wi l l
open and a l lows l iqu id f rom the t ank to f low in to i t . The va lves c los e
au tom at i ca l ly a f t e r t ime de lay o f 5 s econd s . Af t e r t ha t , con ta iner wi l l be
t r ans por t ed to ano ther s t a t ion . T ime de lay s t a r t s when s ens or S I i s
t r iggered . The va lve i s con t ro l l ed by a ro t a ry ac tua to r which i s ac t iva t ed
by a s ing le ac t ing s o leno id . P l eas e r e f e r F igure Q2( a) fo r d i ag ram of th i s
p roces s . Dra w e l ec t r i c d i ag ram for the p roce s s .
(7 marks)
(b ) F igu re Q2(b ) s hows the d r i l l i ng p roc es s o f an ob jec t . I n i t ia l ly , par t s a r e
manual ly p l aced in a r ecep tac l e . W hen PB i s p r es s ed , cy l inder A pus hes a
r ecep tac l e under the d r i l l i ng un i t . Then , cy l inder B wi l l s t a r t t o ex tend .
Dr i l l i ng ope ra t ion s t a r t s once cy l inde r B a t i t f u l l ex ten s ion . Dr i l l i ng
opera t ion opera t e fo r 5 s econd s . Af t e r d r i l l i ng cy l inder A mus t no t
r e tu rn un t i l d r i l l f eed un i t has r eached i t s s t a r t pos i t i on .
2
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D E K 3 1 1 3
C yl i n d er A - Single Acting Cylinder (3/2 way valve normally c lose) :
Solenoid for cyl inder A- Y l
C yl i n d er B - Double Acting Cylinder (5/2 way direct ional valve) :
Solenoid for cyl inder B- Y1 and Y2
As s u mp t i o n :
(1) Time for cyl inder A to move from original posi t ion to ful l
extension(or vice versa) is 1 sec .
(2) Time for cyl inder B to move from original posi t ion to ful l
extension(or vice versa) is 2 sec .
(3) Next process wil l not execute unless previous process been
execu ted .
Based on Figure Q2(b):
( i ) Draw a motion diagram for the appl icat ion.
(4 marks )
( i i ) Draw displacement diagram for Cylinder A and Cylinder B and
indicate t ravel ing t ime in the diagram
(4 marks)
( i i i) Draw electr ic diagram for the process
(10 marks )
Q 3. (a) An alarm buzzer wil l sound when the sensor S1 at the front door or thesensor S2 at the back door is act ivate .(When detect movement) . The
alarm buzzer wil l s top when the sensor is de-act ivated (Not detect
movement) . Draw the PLC ladder diagram ( including i ts addresses) and
i ts mnemonic funct ion for this system.
(7 marks )
(b) Figure Q3(b) show a ladder diagram of a system. Write the mnem onic
funct ion of the system.
(8 marks)
(c) Based on Figure Q3(c) , Sensor SI used to detect and count the numb er
of products being carr ied on an assembly l ine . When i t counts three
products , a s ingle act ing cyl inder wil l be extended to push a three
product into a conveyor for packaging. After 3 seconds, the cyl inder wil l
go back to i ts or iginal posi t ion and at the same t ime, reset the
AD DER (empty ing the AD DER ) . Draw ladde r d iag ram fo r the sys tem,
sys tem.
3
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D E K 3 1 1 3
No t e :
P lease use DIFU, ADD, CMP and MOV in your so lu t ion .
Need a l loca te spec i fi c address us ing CQ M1 H mode l .
Special re lay: 25313(always on) , 25505(>) , 25506(=) , 25507(<)
(10 marks )
Q 4. (a) Consider the integrator c ircui t in Figure 4(a) . The input s ignal , Vi to
the c ircui t is a 20kHz square wave with 3Vp-p.
(i) Sketch and label th e values of the outpu t s ignal , Vo.
(6 marks )
( i i ) Calculate the frequencies where the c ircui t wil l s top act ing as an
integrator .
(4 marks )
( i i i ) Sketch the output s ignal , Vo whe n i t is not act ing as an integrator and
wha t kind of c ircui t i t is act ing now .
(5 marks )
(b) Fro m Figure 4 (b), all value R and V are s ta ted as below:
R l = 2 k i l , R 2 = 6 k Q , R 3 = 5 k Q , R 4 = 4 k O , R 5 = 8 k £ l , R 6 = 1 5 k O ,
R 7 = 1 0 k Q
V l = l V , V 2 = 2 V
( i ) N am e types of Op Am p from the c ircui t .
(4 marks )
( i i ) Find the value for V3 , V4 and V5
(6 marks )
Q 5.
(a) Elaborate PW M concept in control l ing the speed of s imple motor .
(6 marks )
(b) In term of duty cycle and average output, explain what is the difference
between three diagram in Figure Q5(b) .I r iput s ignal is 12V.
(9 marks )
(c) With an appropria te diagram explain Ful l Step One On operat ion andFull Step Two On operat ion of Stepper motor .
(10 marks )
4
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1
D E K 3 1 1 3
F I N A L E X A M I N A T I O NSESSION :S E M I / 2 0 0 9 / 2 0 0 1 0
SUBJE CT: ELEKTRONIK INDUSTRI
C O U R S E :3DEE/DET
SUBJECT CODE : DEK 3113
Batery source
1 5 A
Fuse
i
LHorn
Reay
1 OHorn
swtch
Horn
Let Hand
Horn
Rtlh Hand
F i gu re 01 ( b )
S u p p l y
N o r m a l c u r r e n tw ith t l i iver o n
C u r r e n tw l i en d r i ve rturns o f f
Re la y c o i l
L o o p 1
F i gu re Q l ( d )
5
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D EK 3 1 3 3
F IN A L E X A M IN A T IO N
SESSION : SEM 1/2009/20010 COURSE : 3DEE/DET
SUBJ ECT: INDUSTR IAL ELECTRONICSSUBJECT CODE : DEK 3113
R o t a r y
A c t u a t o r
Figure Q2(a)
6
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D E K 3 1 1 3
F IN A L E X A M IN A T IO NSESSION : SEM I/2009 /20010 COURSE • 3DEE/DET
SUBJECT : INDUSTRIAL ELECTRONICS SUBJECT CODE : DEK 3113
r e c e p t a c l e
B
Figure Q2(b)
7
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D E K 3 1 1 3
F IN A L E X A M IN A T IO NSESSION: SEM 1/2009/2010
SUBJECT: INDUSTRIAL ELECTRONICS
COURSE: 3DEE/DET
SUBJECT CODE: DEK 3113
o . o o
-H h-
O 01
—U H
0.13
—
0.05
— n -
0.03-H h-
0 . 0 1
—I h-
0.02
—i l-
0.07
—P-1-
0.06
0.06
O 13
-H H
0.04
o . o - i—H— 0.02— H -
0.1 2
—I t-
o . o s-I h-
00 9
-H H-
O 06
—I K
o . o s— H -
O 06
— n -
00 4
—U-1-
o.- l o—I I-
1 o o . o o
— o —
F igure 03 (b)
F igure 03 (c )
8
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DEK 3113
9
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D E K 3 1 1 3
F IN A L E X A M IN A T IO NSESSION: SEM 1/2009/2010 COURSE: 3DEE/DET
SUBJECT. INDUSTRIAL ELECTRONICS SUBJECT CODE: DEK 3113
l a : 1 : 1 m a r k - s p a c e r at io ( 5 0 % d u t y c y c l e )
l b : 3 : 1 m a r k - s p a c e r a ti o ( 7 5 % d u t y c y c l e )
l c : 1 : 3 m a r k - s p a c e r a t i o ( 2 5 % d u t y c y c l e )
F i gu r e 0 5 ( b )
10
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D E K 3 1 1 3
F I N A L E X A M I N A T I O NSESSION: SEM1/2009/2010
SUBJECT: INDUSTRIAL ELECTRONICS
COURSE: 3DEE/DET
SUBJECT CODE: DEK 3113
3 V p - p
M5kHz
R 1
10 teQ
Qo k t f l
0 . 0 0 2 2 HF
R F
A / V1 0 0 k o
F i g u r e 0 4 ( a )
R 2
10 kn
v1 O
R1
R2-VsA/V-
R3- m — i
v3
R4V2 Q VAV-
OpAmpI
R5- w w -
R 6
v 4
Op >4mp2
F i g u r e 0 4 ( b )
R7
v 5
OpAmpI
9