LS-221-BL Technical Reference
Doc. #710220125
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T h e o u tp u t c u rre n t fro m e a c h h a lf H -b rid g e is c o n tin u o u s ly m o n ito re d b y a p ro te c tio n lo g ic
a n d m a y b e lim ite d to a v a lu e a d ju s ta b le in th e ra n g e o f 2
÷
1 0 A . T h e lim it fo r e a c h a x is c a n b e
p ro g ra m m e d in d iv id u a lly u s in g a s p e c ia l re g is te r. T h e ra n g e 2
÷
1 0 A is d iv id e d in to 1 6 s te p s . A
trim m e r-p o t (P 0 , P 1 ) is u s e d fo r p re c is e a d ju s tm e n t o f th e s e le c te d lim it. If th e a m p lifie r o u tp u t
is o v e rlo a d e d o r e v e n s h o rte d fo r a m o m e n t, th e b rid g e o u tp u t c u rre n t is lim ite d to th e
p ro g ra m m e d v a lu e . T h e p ro te c tio n h a s tw o m o d e s d e p e n d in g o n J 3 ju m p e r s e ttin g . W ith J 3
ju m p e r in s ta lle d , if th e o v e rlo a d in g ta k e s p la c e m o re th a n 1 0 0 m s , th e s e rv o lo o p w ill b e s h u t
d o w n a u to m a tic a lly a n d th e P W M p o w e r a m p lifie rs w ill b e d is a b le d . If J 3 is le ft o p e n , th e s e rv o
lo o p w ill re m a in c lo s e d re g a rd le s s o f th e o v e rlo a d d u ra tio n . T h e o u tp u t c u rre n t is lim ite d to th e
s p e c ifie d v a lu e .
S e e 4 .2 .4 .3 fo r m o re in fo rm a tio n o n c u rre n t lim it.
4.2.3. Digital Outputs and Outbound Power
B e in g a fu lly in te g ra te d s e rv o c o n tro lle r, a lo n g w ith th e s e rv o c h a n n e ls , L S -2 2 1 -B L o ffe rs 8
g e n e ra l p u rp o s e d ig ita l o u tp u ts e q u ip p e d w ith h ig h v o lta g e , h ig h c u rre n t F E T tra n s is to rs a n d
th re e re la y c o n tro lle d p o w e r s o u rc e s . T h e p o w e r s o u rc e s a re n a m e d b a s e d o n th e ir typ ic a l
a p p lic a tio n . S P S (S ys te m P o w e r S u p p ly) is u s e d b a s ic a lly to p o w e r s e n s o rs . It is a v a ila b le
im m e d ia te ly a fte r th e c o n tro lle r is p o w e re d a n d in itia lis e d . Y o u c a n n o t tu rn o ff th is p o w e r
w ith o u t d is a b lin g th e s e rv o lo o p a n d th e d ig ita l o u tp u ts a s w e ll. O P T (O P T io n a l p o w e r s u p p ly)
is g e n e ra l-p u rp o s e p o w e r s o u rc e a n d m a y b e c o n tro lle d in d iv id u a lly. S P S m u s t b e O N to e n a b le
O P T . O P S (O u tp u t P o w e r S u p p ly) is u s e d b a s ic a lly to p o w e r m o to r b re a k s a n d v a rio u s v a lv e s
a n d s w itc h e s . O P S c a n n o t b e c o n tro lle d s e p a ra te ly. It d e p e n d s o n a m p lifie r e n a b le s ta tu s a n d
S P S o n ly. If th e p o w e r a m p lifie rs a re e n a b le d , th e O P S is p re s e n t a n d if th e a m p lifie rs a re
d is a b le d , th e O P S is O F F . T h is is u s e fu l fo r d e v ic e s th a t s h o u ld b e s h u t o ff a u to m a tic a lly w h e n
th e a m p lifie rs a re d is a b le d , fo r in s ta n c e m o to r b re a k s o r o th e r e m e rg e n c y c irc u its .
