Trouble Shooting - SMC Networks IS10M-20-D Operation Manual

10.TROUBLE SHOOTING

In order to maintain product quality, the pressure switch's parts can not be replaced. The whole product needs to be replaced with a new
one when any failure occurs.
Failure
Switch does Power supply failure
not turn on.
Wiring or connection
is defective.
Decrease of
magnetic force
Lowered sensitivity
of auto switch
Broken wire in the
switch
Lead wire broken
Pressure supplied
Possible cause
1. Power supply voltage is out of specification range.
1. Contact failure of connection (connector, crimped
terminal, terminal).
1. There is a magnetic field source (spot welding
machine, cable with high current, motor, strong magnet,
etc) close to the pressure switch.
2. The pressure switch became abnormally hot.
3. There is accumulation of iron particles or magnetic
substances stuck to the pressure switch.
1. Excessive impact has been applied to the switch.
1. Overcurrent was applied to the switch
1. The lead wire has repeatedly been subject to
bending or tensile force.
2. The lead wire cover has gouges or cracks.
1. Supply pressure to the pressure switch is lower than
the set pressure.
-17-
Countermeasure
1 Set to the specified voltage.
1. Connect wires correctly.
(Check the continuity.)
1. If it is impossible to keep distance from
the strong magnetic field source, provide a
shield plate between the pressure switch
and the source.
2. Keep the temperature of the switch
o
below 60 C.
3-1. Install a protective cover to avoid the
accumulation of iron particles.
3-2. Keep the magnetic material away or
change the material to a non-magnetic
material.
1. Improve so that impact will not be
applied, and then replace the pressure
switch with a new one.
1. Check the control circuit for any factors
that generate an over current, and then
replace the pressure switch.
1-1. Connect the lead wire avoiding tensile
force.
1-2. Keep the bend radius of the lead wire
as large as possible.
1-3. Do not use spiral tube.
1-4. Connect it using a robot cable if
necessary.
2. If there is a possibility of external
damage after wiring the lead wire, protect
the lead wire with a tube.
1. Decrease the set pressure.