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H 5 - 8
R e s u l t : ( 1 ) F i r s t c a l c u l a t e c u r r e n t c o n s u m p t i o n o f i n t e r n a l 5 V D C l o g i c p o w e r s u p p l y
+ 7 2 2 m A - 1 2 0 m A - 2 2 3 m A - 11 9 m A - 4 0 m A - 4 0 m A - 2 5 m A = + 1 5 5 m A ( O K )
( 2 ) A n d t h e n c a l c u l a t e c u r r e n t c o n s u m p t i o n o f i n t e r n a l 2 4 V D C l o g i c p o w e r s u p p l y
+ 3 2 5 m A - 1 2 4 m A - 1 3 6 m A - 1 3 6 m A = - 7 1 m A ( o v e r l o a d )
( 3 ) C a l c u l a t e c u r r e n t c o n s u m p t i o n o f e x t e r n a l 2 4 V D C S e n s o r p o we r s u p p l y
+ 2 9 5 m A - 1 6 2 m A - 5 3 m A = + 8 0 m A ( O K )
In conclusion, the total current consumption of internal 24VDC logic power supply of above six expansions exceeds
power capacity of the main unit, so needs to expand power supply module as in example 3.
Example 3:
The below diagram is a system modules, try to calculate the power supply used of the system.
R e s u l t
R e s u l t
I n t e r n a l 5 V D C
l o g i c p o w e r
s u p p l y
- 1 2 0 - 2 2 3 + 7 2 2 - 11 9
- 4 0 - 2 5
+ 1 9 5
( O K )
4 0 0
- 4 0
+ 3 6 0 ( O K )
I n t e r n a l 2 4 V D C
l o g i c p o w e r
s u p p l y
-
-
+ 3 2 5 - 1 2 4
- 1 3 6
-
+ 6 5
( O K )
2 5 0 - 1 3 6
+ 11 4
( O K )
E x t e r n a l 2 4 V D C
S e n s o r p o w e r
s u p p l y
-
-
+ 2 9 5 - 1 6 2
-
- 5 3
+ 8 0
( O K )
2 5 0
-
+ 2 5 0
( O K )
R e s u l t : ( 1 ) F i r s t c a l c u l a t e t h e c u r r e n t c o n s u m p t i o n o f e x p a n s i o n m o d u l e s wh i c h p r o v i d e d f r o m
t h e m a i n u n i t .
c u r r e n t c o n s u m p t i o n o f i n t e r n a l 5 V D C l o g i c p o w e r s u p p l y
+ 7 2 2 m A - 1 2 0 m A - 2 2 3 m A - 11 9 m A - 4 0 m A - 2 5 m A = 1 9 5 m A ( O K )
c u r r e n t c o n s u m p t i o n o f i n t e r n a l 2 4 V D C l o g i c p o w e r s u p p l y
+ 3 2 5 m A - 1 2 4 m A - 1 3 6 m A = 6 5 m A ( O K )
c u r r e n t c o n s u m p t i o n o f e x t e r n a l 2 4 V D C S e n s o r p o w e r s u p p l y
+ 2 9 5 m A - 1 6 2 m A - 5 3 m A = 8 0 m A ( O K )
( 2 ) t h e n c a l c u l a t e t h e c u r r e n t c o n s u m p t i o n o f e x p a n s i o n m o d u l e s w h i c h p r o v i d e d f r o m
e x p a n s i o n p o w e r s u p p l y m o d u l e
c u r r e n t c o n s u m p t i o n o f i n t e r n a l 5 V D C l o g i c p o w e r s u p p l y
+ 4 0 0 m A - 4 0 m A = + 3 6 0 m A ( O K )
c u r r e n t c o n s u m p t i o n o f i n t e r n a l 2 4 V D C l o g i c p o w e r s u p p l y
+ 2 5 0 m A - 1 3 6 m A = + 11 4 m A ( O K )
c u r r e n t c o n s u m p t i o n o f e x t e r n a l 2 4 V D C S e n s o r p o w e r s u p p l y
+ 2 5 0 m A - 0 m A = + 2 5 0 m A ( O K )
In conclusion, add one expansion power supply(FBs-EPW-AC)
,
in this way it can satisfy the total current
consumption of six expansion modules.
( 1 ) ( 2 )
FBs-
EPW-AC
U n i t
:
m A
FBs-
CM55E
FBs-
B2DA
FBs-
24MC
FBs-
60XYR
FBs-
16YR
FBs-
6AD
FBs-
16YR