D4C-1202 Omron, D4C-1202 Datasheet - Page 30

• 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

Typical Problems, Probable Causes, and Remedies
Mechanical
failure
Failures
related to
chemical or
physical
characteristics
Failures
related to
electric
characteristics
1. The actuator does not
2. The actuator does not return.
3. The actuator has been
4. The actuator is worn.
5. The actuator has been
There is a large deviation in
operating position (with
malfunctioning involved).
The terminal part wobbles. (The
mold part has been deformed.)
Contact chattering
Oil or water penetration
Deterioration of the rubber part
Corrosion (rusting or cracks)
No actuation.
No current breakage.
Contact welding
operate.
deformed.
damaged.
Problem
The shape of the dog or cam is incorrect.
The contacting surface of the dog or cam is
rough.
The actuator in use is not suitable.
The operating direction of the actuator is not
correct.
The operation speed is excessively high.
Excessive stroke.
The rubber or grease hardened due to low
temperature.
The accumulation of sludge, dust, or
cuttings.
Dissolution, expansion, or swelling damage
to the rubber parts of the driving
mechanism.
Damage to and wear and tear of the internal
movable spring.
Wear and tear of the internal mechanism.
The loosening of the mounting screws
causing the position to be unstable.
Overheating due to a long soldering time.
The Switch has been connected to and
pulled by thick lead wires with excessive
force.
High temperature or thermal shock resulted. • Use a temperature-resistive switch or change
Vibration or shock is beyond the rated
value.
Shock has been generated from a device
other than the Switch.
Too-slow operating speed.
The sealing part has not been tightened
sufficiently.
The wrong connector has been selected
and does not conform to the cable.
The wrong switch has been selected.
The terminal part is not molded.
The Switch has been burnt or carbonated
due to the penetration of dust or oil.
The expansion and dissolution of the rubber
caused by solvent or lubricating oil.
Cracks due to direct sunlight or ozone.
Damage to the rubber caused by scattered
or heated cuttings.
The oxidation of metal parts resulted due to
corrosive solvent or lubricating oil.
The Switch has been operated in a
corrosive environment, near the sea, or on
board a ship.
The electrical deterioration of metal parts of
the Switch resulted due to the ionization of
cooling water or lubricating oil.
The cracking of alloyed copper due to rapid
changes in temperature.
Inductive interference in the DC circuit.
Carbon generated on the surface of the
contacts due to switching operations.
A short-circuit or contact weld due to contact
migration.
Contact weld due to an incorrectly
connected power source.
Foreign materials or oil penetrated into the
contact area.
Probable cause
Precautions for All Switches
• Change the design of the dog or cam and
• Scrutinize the suitability of the actuator.
• Attach a decelerating device or change the
• Change the stroke.
• Use a cold-resistive switch.
• Use a drip-proof model or one with high
• Use a protection cover and change the
• Regularly inspect the Switch.
• Use a better quality switch.
• Tighten the mounting screws securely. Use a
• Solder the Switch quickly.
• Change the lead wire according to the carry
• Attach an anti-vibration mechanism.
• Attach a rubber circuit to the solenoid.
• Increase the operating speed (with an
• Use a drip-proof or waterproof switch.
• Use the correct connector and cable. (Use a
• Use an oil-resistant rubber or fluororesin
• Use a weather-resistant rubber or protective
• Use a switch with a metal bellows protective
• Change the lubricating oil.
• Change mounting positions.
• Use a crack-resistant material.
• Add an erasing circuit.
• Use a switch with a special alloy contact or
• Reduce the switching frequency or use a
• Change the circuit design.
• Use a protective box.
smooth the contacting surface of the cam.
Make sure that the actuator does not bounce.
mounting position of the Switch.
degree of protection.
solvent and materials.
mounting board.
current and ratings.
mounting positions.
accelerating mechanism).
sealed connector for sealed switches.)
bellows.
cover.
cover.
use a sealed switch.
switch with a large switching capacity.
Remedy
25