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Operating Environment
1. Perform the following maintenance periodical
in order to prevent possible danger due t
unexpected trimmer auto switch malfunction
1) Secure and tighten switch mounting screws.
If screws become loose or the mounting position
dislocated, retighten them after readjusting the mounti
position.
2) Confirm that there is no damage to lead wires.
To prevent faulty insulation, replace switches or repair lea
wires, etc., if damage is discovered.
Maintenance
1. Never use in an atmosphere with explosive
gases.
The structure of trimmer auto switches is not designed to
prevent explosion. Never use in an atmosphere with an
explosive gas since this may cause a serious explosion.
2. Do not use in an area where a magnetic field
is generated.
Trimmer auto switches will malfunction or magnets inside
cylinders will become demagnetized.
3. Do not use in an environment where the
trimmer auto switch will be continually
exposed to water.
Although the sensor units of trimmer auto switches satisfy the
IEC standard IP67 structure (JIS C0920: watertight
construction), do not use trimmer auto switches in applications
where continually exposed to water splash or spray. Poor
insulation or swelling of the potting resin inside switches may
cause malfunction.
(Amplifier part D-RNK and RPK: IP40)
4. Do not use in an environment with oil or
chemicals.
Consult SMC if auto switches will be used in an environment
with coolant, cleaning solvent, various oils or chemicals. If
auto switches are used under these conditions for even a
short time, they may be adversely affected by improper
insulation, malfunction due to swelling of the potting resin, or
hardening of the lead wires.
5. Do not use in an environment with temperature
cycles.
Consult SMC if switches are used where there are
temperature cycles other than normal temperature changes,
as they may be adversely affected.
6. Do not use in an area where surges are
generated.
When there are units (solenoid type lifter, high frequency
induction furnace, motor, etc.) which generate a large amount
of surge in the area around cylinders with trimmer auto
switches, this may cause deterioration or damage to the
circuit element inside the switch. Take measures against
sources of surge generation and take caution to crossed lines.
7. Avoid accumulation of iron powder or close
contact with magnetic substances.
When a large amount of ferrous powder such as machining
chips or spatter is accumulated, or a magnetic substance is
brought into close proximity with an auto switch cylinder, it
may cause the auto switch to malfunction due to a loss of the
magnetic force inside the cylinder.
8. Take measures against freezing when
operating at 5°C or less.
1. Consult SMC concerning water resistance
elasticity of lead wires, and usage at weldin
sites, etc.
Other
Warning Warning
Warning
Trimmer Auto Switch Precautions 2
Be sure to read before handling