D4C-1202 Omron, D4C-1202 Datasheet - Page 26

• Manufacturer Part Number: D4C-1202
• Description: SMALL LIMIT SWITCH
• Manufacturer: Omron
• Series: D4Cr

Specifications of D4C-1202

• Rohs Compliant: YES
• Circuit: SPDT
• Switch Function: On-Mom
• Contact Rating @ Voltage: 5A @ 250VAC
• Actuator Type: Roller Plunger
• Mounting Type: Chassis Mount
• Termination Style: Cable Leads
• Operating Force: 1177gf
• Actuator Style: Roller Plunger
• Operating Force Max: 11.77N
• Contact Voltage Ac Max: 250V
• Contact Voltage Dc Max: 30V
• Contact Current Ac Max: 5A
• Contact Current Dc Max: 4A
• Switch Terminals: Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: D4C1202

• If the Switch is used in locations with silicone gas, arc energy may
Regular Inspection and Replacement
• If the Switch is normally closed with low switching frequency (e.g.,
• In addition to the mechanical durability or electrical durability of the
• Be sure to mount the Switch securely in a clean location to ensure
Storage of Switch
• When storing the Switch, make sure that the location is free of
• Be sure to inspect the Switch before use if it has been stored for
Weather Resistance, Cold Resistance, and Heat
Resistance
Silicon rubber is used to increase resistance to weather, cold, and
heat. Silicon rubber, however, can generate silicon gas. (This can
occur at room temperature, but the amount of silicon gas generated
increases at higher temperatures.) Silicon gas will react as a result of
arc energy and form silicon oxide (SiO
on the contacts, contact interference can occur and can interfere with
the device. Before using a Switch, test it under actual application
conditions (including the environment and operating frequency) to
confirm that no problems will occur in actual.
Outdoor Use
• If the Limit Switch is used in places with sludge or dust powder
• The rubber materials exposed to ozone may deteriorate. Check that
• Due to capillary attraction, rainwater may enter the Limit Switch
• If the Limit Switch is used outdoors, the steel parts of the Limit
• “Limit Switch is used outdoors” refers to an environment where the
create silicon dioxide (SiO
may result. If there is silicone oil, silicone sealant, or wire covered
with silicone close to the Switch, attach a contact protective circuit
to suppress the arcing of the Switch or eliminate the source of
silicone gas generation.
once or less than once a 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.
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 in order to prevent accidents from occurring.
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.
corrosive gas, such as H
spray, make sure that the mechanical parts are sealed with a rubber
cap.
the rubber parts are made of environment-resistive materials, such
as chloroprene, silicone, or fluorine rubber.
through the lead wires or sheath. Be sure to cover the wire
connections in a terminal box so that they are not directly exposed
to rainwater.
Switch (such as the screws and plunger parts) may corrode.
Consider the use of outdoor models, such as WL-@P1 or D4C-@P.
Limit Switch is exposed directly to rainwater or sunlight (e.g., multi-
story parking facilities) excluding locations with corrosive gas or
salty breezes. A Limit Switch used outdoors may not release due to
icing and may not satisfy specified standards.
does not have a high temperature or humidity.
three months or more.
Difficult to inspect or install
Incorrect
2
S, SO
2
) on the contacts and a contact failure
2
, NH
The cover must be located
in the direction ensuring
ease of maintenance or
inspection.
Easy to inspect
2
3
). If silicon oxide accumulates
, HNO
3
, or Cl
2
, or dust and
Correct
Operation
• Carefully determine the position and shape of the dog or cam so that
• The method of operation, the shape of the cam or dog, the operating
• Appropriate force must be imposed on the actuator by the cam or
• Unbalanced force must not be imposed on the actuator. Otherwise,
• With a roller actuator, the dog must touch the actuator at a right
the actuator will not abruptly snap back, thus causing shock. In order
to operate the Limit Switch at a comparatively high speed, use a dog
or cam that keeps the Limit Switch turned ON for a sufficient time so
that the relay or valve will be sufficiently energized.
frequency, and the travel after operation have a large influence on
the durability and operating accuracy of the Limit Switch. The cam
or dog must be smooth in shape.
dog in both rotary operation and linear operation. If the dog touches
the lever as shown below, the operating position will not be stable.
wear and tear on the actuator may result.
angle. The actuator or shaft may deform or break if the dog touches
the actuator (roller) at an oblique angle.
Snapped
back
Snapped
back
Incorrect
Dog
Abruptly
actuated
Dog
Precautions for All Switches
Incorrect
Dog
Abruptly
actuated
Roller
Incorrect
Incorrect
Incorrect
Dog
Correct
Dog
Correct
Correct
Dog
Correct
Roller
Correct
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