LS-221-BL Technical Reference
Doc. #710220125
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Figure 5: Digital outputs and outbound power sources
T h e o u tp u ts a re o p e n c o lle c to r tra n s is to rs c o n n e c te d to th e g ro u n d o f th e o p e ra tin g v o lta g e .
T h e y a re o p to is o la te d fro m th e c o m p u te r g ro u n d . A ll o u tp u ts a re s h o rt-c irc u it p ro te c te d . If o n e
o f th e m is o v e rlo a d e d , th e p ro te c tio n c irc u it w ill s h u t d o w n a ll tra n s is to r o u tp u ts . O P T a n d S P S
re la ys w ill n o t b e a ffe c te d . T h e s e rv o lo o p w ill b e tu rn e d o ff a u to m a tic a lly (a m p lifie r d is a b le )
a n d th is w ill tu rn o ff O P S a s w e ll. O n c e a c tiv a te d , th e p ro te c tio n k e e p s o u tp u ts d is a b le d u n til
th e re a s o n th a t c a u s e d th e o v e rlo a d in g is p re s e n t. T h e o u tp u ts a re c o n tro lle d th ro u g h th e
a s s o c ia te d re g is te rs .
R/W access
D7
D6
D5
D4
D3
D2
D1
D0
Base Addr + 0xA
R/W
AE
RST
OPT
SPS
CL1
CL0
Base Addr + 0xD
R/W
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
Table 3: Digital outputs and outbound power registers
To activate an output or a power source, logic one must be written to the corresponding control bit.
Activating the emergency stop will turn off SPS and will disable all other power sources and outputs. For
safety reasons, to prevent an accidental turn on after an emergency, SPS is equipped with a
special double buffered logic. In order to restore SPS after being shut off by emergency stop,
SPS must be cycled off-on. SPS control bit should be first reset to logic zero and after that set to
logic one.
