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Operating Environment
The Switches are designed for use indoors.
Using a Switch outdoors may cause it to malfunction.
Do not use the Switch submerged in oil or water, or in locations
continuously subject to splashes of water. Doing so may result in
oil or water entering the Switch interior.
Confirm suitability (applicability) in advance before using the
Switch where it would be subject to oil, water, chemicals, or
detergents. Contact with any of these may result in contact failure,
insulation failure, earth leakage faults, or burning.
Do not use the Switch in the following locations:
• Locations subject to corrosive gases
• Locations subject to severe temperature changes
• Locations subject to high humidity, resulting in condensation
• Locations subject to severe vibration
• Locations subject to cutting chips, dust, or dirt
• Locations subject to high humidity or high temperature
Use protective covers to protect Switches that are not specified as
waterproof or airtight whenever they are used in locations subject
to splattering or spraying oil or water, or to accumulation of dust or
dirt.
Incorrect
Terminal box
Be sure to install the Switch so that the Switch is free from dust or
metal powder. The Actuator and the Switch casing must be
protected from the accumulation of dust or metal powder.
Incorrect
Do not use the Switch in locations where the Switch is exposed to
steam or hot water at a temperature greater than 60 C.
Do not use the Switch under temperatures or other environmental
conditions not within the specified ranges.
The rated permissible ambient temperature range varies with the
model. Refer to the Specifications in this catalog.
If the Switch is exposed to radical temperature changes, the
thermal shock may deform the Switch and the Switch may
malfunction.
Incorrect
Be sure to protect the Switch with a cover if the Switch is in a
location where the Switch may be actuated by mistake or where
the Switch is likely cause an accident.
Incorrect
http://www.ia.omron.com/
Correct
Terminal box
Correct
Correct
Separate the
Switch
from heat
sources
Correct
Prevent false operation
Make sure to install the Switch in locations free of vibration or
shock. If vibration or shock is continuously imposed on the Switch,
contact failure, malfunction, or decrease in service life may be
caused by abrasive powder generated from the internal parts. If
excessive vibration or shock is imposed on the Switch, the
contacts may malfunction or become damaged.
Do not use the Switch with silver-plated contacts for long periods if
the switching frequency of the Switch is comparatively low or the
load is minute. Otherwise, sulfuric film will be generated on the
contacts and contact failures may result. Use the Switch with
gold-plated contacts or use a Switch designed for minute loads
instead.
Do not use the Switch in locations with corrosive gas, such as
sulfuric gas (H
S or SO
), ammonium gas (NH
2
2
or chlorine gas (Cl
), or high temperature and humidity. Otherwise,
2
contact failure or corrosion damage may result.
If the Switch is used in locations with silicone gas, arc energy may
create silicon dioxide (SiO
) on the contacts and a contact failure
2
may result. If there is silicone oil, silicone sealant, or wire covered
with silicone close to the Switch, attach a contact protection circuit
to suppress the arcing of the Switch or eliminate the source of
silicone gas generation.
Regular Inspection and Replacement
If the Switch is normally closed with low switching frequency (e.g.,
once or less per day), a reset failure may result due to the
deterioration of the parts of the Switch. Regularly inspect the
Switch and make sure that the Switch is in good working order.
In addition to the mechanical durability or electrical durability of the
Switch described previously, the durability of the Switch may
decrease due to the deterioration of each part, especially rubber,
resin, and metal. Regularly inspect the Switch and replace any part
that has deteriorated to prevent accidents from occurring.
If the Switch is not turned ON and OFF for a long period of time,
contact reliability may be reduced due to contact oxidation.
Continuity failure may result in accidents (i.e., the switch may not
turn ON due to increased contact resistance.)
Be sure to mount the Switch securely in a clean location to ensure
ease of inspection and replacement. The Switch with operation
indicator is available, which is ideal if the location is dark or does
not allow easy inspection or replacement.
Incorrect
Difficult to inspect or install
Storage of Switch
When storing the Switch, make sure that the location is free of
corrosive gas, such as H
S, SO
2
does not have a high temperature or humidity.
Be sure to inspect the Switch before use if it has been stored for
three months or more.
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
Precautions for All Switches
), nitric gas (HNO
3
Correct
Easy to inspect
The cover must be located
in the direction ensuring
ease of maintenance or
inspection.
, NH
, HNO
, or Cl
, or dust and
2
3
3
2
),
3
C-8
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