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4.3
POWER SUPPLY
Although composite
power
supplies
(CPS-12N)
for control are
provided
with various
protective functions,
it will be
necessary to contact mainte¬
nance
personnel. immediately after checking the following
items if
an
abnormal situation arises such
as inability to
switch ON NC
power.
(1)
The "SOURCE"
(green)
LED
goes out
(I) Check
whether themain circuit breaker of the machine or the
factory
has
tripped or
if there is
an
open
phase.
©
Trouble
may
be considered in the
composite
power
supply
itself for
control.
(2) "
+
5,
±
12V" LED
(red) lights
<P
This
lights
when
overcurrent
due
to
a
short
circuit
in the
+
5V or ±
12V, or
when
a
+
5V overvoltage is detected.
©
If
overcurrent
is the
cause of the failure,
the
power can
be turned
ON
again by switching power on
the
cause.
(Cÿ
after
removing
©
If
+
5V
overvoltage is
the
cause,
switch
power
ON
again
after first
that the "SOURCE" LED
is
out
by
setting
the main
breaker
to
OFF
once.
(3)
"
+
24V" LED
(red)
lights
(P This
LED
lights if
overcurrent
due
to
a
short circuit in the
+
24V
output
is detected.
E.
tgJ
Switch
power
ON
failure.
after removing the
cause of the
(4)
"OHT" LED
(red)
lights
(P This LED lights when abnormal
temperature
rise of
internal
parts
is
detected.
©
Switch
power
ON
°(#L)
failure.
after removing the cause
of the
-
653
-
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