P M A C
3 0 0 0
Page
17
Cycle
‐
On
Cycle
‐
On
is
a
digital
input
that
is
available
to
the
user
in
the
Digital
I/O
connector
on
the
rear
of
the
PMAC
3000.
See
Figure
1.
The
cycle
‐
on
input
is
electrically
isolated
from
the
PMAC
3000.
It
can
be
activated
by
applying
5VDC
to
24VDC
nominal
across
the
inputs,
pin
1
to
pin
2,
on
the
digital
I/O
connector.
The
maximum
input
voltage
is
30VDC.
The
input
is
reverse
polarity
protected.
See
Figure
14.
Figure
14
–
Cycle
‐
On
Input
Schematic
Limit
Outputs
There
are
four
limit
outputs
that
are
available
to
the
user
in
the
Digital
I/O
connector
on
the
rear
of
the
PMAC
3000.
See
Figure
1.
The
High,
Pass
and
Low
limits
reflect
the
status
of
their
corresponding
front
panel
indicators.
The
Target
output
is
a
special
case
in
that
it
does
not
have
a
corresponding
display
indicator.
The
Target
output
also
differs
in
that
it
is
always
evaluated
in
real
time,
regardless
of
the
Function
Mode
selected.
All
four
limit
outputs
are
active
low,
switching
to
ground
when
active.
See
Figure
15.
They
are
not
isolated
from
the
PMAC
3000.
The
outputs
are
designed
to
operate
by
switching
a
load
on
a
5VDC
to
24VDC
nominal
supply.
The
absolute
maximum
voltage
limit
on
each
output
is
26VDC.
Maximum
switching
current
is
1.5A.
Figures
16
‐
19
show
a
few
typical
connections
to
the
limit
outputs.
