Mitsubishi MELSERVO-SO Instruction Manual page 6

t a t i o n cannot be r e v e r s e d ( t h e system d i f f e r s from con-
v e n t i o n a l motor c o n t r o l s y s t e m s and i n v e r t e r - c o n t r o l l e d
s y s t e m s ) , by changing power p h a s e sequence.
9 )
The i n p u t power s o u r c e c i r c u i t s h o u l d be s u c h t h a t t h e
power s o u r c e cannot be d i r e c t l y a p p l i e d t o t h e o u t p u t
t e r m i n a l s (U.
V. W).
Although t h e s e r v o - a m p l i f i e r i s p r o t e c t e d from s h o r t -
c i r c u i t i n g between s e r v o - a m p l i f i e r o u t p u t l i n e s (term-
i n a l s U, V and W) by t h e o v e r c u r r e n t p r e v e n t i v e func-
t i o n , t h e system is n o t p r o t e c t e d from ground f a u l t o r
any l e a k t r o u b l e . T h e r e f o r e , c a r e s h o u l d b e e x e r c i s -
e d t o p r e v e n t c o n t a c t o f any c o n d u c t o r w i t h c a s e o r
o t h e r m e t a l l i c p a r t .
1 0 )
A
grounding w i r e s h o u l d be c o n n e c t e d t o t h e ground term-
1 -
i n a l
( 7 )
w i t h o u t f a i l ( s e e F i g .
1).
The grounding s h o u l d be o f " c l a s s
3"
( r e s i s t a n c e t o
ground: maximum 1 0 0 ~ ~ ) w i t h g r o u n d i n g w i r e o f 2mm2 i n
s i z e . The grounding w i r e s h o u l d be as s h o r t as p o s s i -
b l e .
( 1 ) E x c l u s i v e
( 2 )
Common (3) Common
grounding g r o u n d i n g grounding
l i n e
....
l i n e
....
l i n e
. .
.
BEST GOOD NOT ACCEFTABLE