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Eaton Limit Switch - LS-11S - 266105

Eaton Limit Switch - LS-11S - 266105

Eaton Moeller series LS Position switch with a rounded plunger. This basic, expandable device feat...

Best current price£24.55from Tameson UK

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Product Information

Full details

This Eaton Moeller LS-11S position switch is designed for industrial automation and control applications, offering reliable actuation with its rounded plunger and snap-action mechanism. It's ideal for machine builders and maintenance personnel needing a robust, expandable limit switch with both Normally Open (NO) and Normally Closed (NC) contacts. A key benefit is its versatility with multiple voltage ratings and IP66/IP67 protection, though its non-electronic output limits its use in highly specialized digital control systems.

All features

SeriesLS-11S
Model Part Number266105
BrandEaton

Extended Product Information

FAQs

What does 'snap-action' mean for this switch?

Snap-action means the switch contacts change state very quickly once a certain threshold of actuator movement is reached, ensuring a decisive and reliable switching event rather than a gradual contact change.

What is the purpose of the 1 Normally Open (NO) and 1 Normally Closed (NC) contact?

The NC contact is closed when the switch is not actuated and opens when actuated, typically used for safety or interrupt circuits. The NO contact is open when not actuated and closes when actuated, often used to signal an event or start a process.

How do I connect wires to the Cage Clamp terminals?

Strip the end of the wire to the appropriate length (refer to manual if available) and insert it directly into the terminal opening. The internal clamp automatically grips the wire securely. To release, a screwdriver or tool may be needed depending on the specific terminal type.

Can this switch be used outdoors?

Yes, with its IP66 and IP67 ratings, the switch is protected against dust ingress and can withstand powerful water jets and temporary immersion, making it suitable for many outdoor applications when properly installed.

What is the typical lifespan of this limit switch?

The LS-11S is rated for a mechanical durability of 8 million switching cycles, which translates to a long operational life under normal load and environmental conditions.

Is this switch suitable for high-frequency switching applications?

The switch has a maximum operating frequency of 6000 switching cycles per hour. While suitable for many automation tasks, extremely high-frequency applications might require specialized devices.

What is the significance of EN 50047 Form B compliance?

This compliance indicates that the switch meets specific international standards for dimension, mounting, and contact type, ensuring interoperability and safety in various industrial control systems.

Troubleshooting

Switch not activating

Verify that the actuator is properly aligned with the moving part. Check for obstructions or damage to the plunger. Ensure the mounting position allows for full actuation.

Contacts not switching (NO remains open, NC remains closed)

Check wiring connections to ensure they are secure in the Cage Clamp terminals. Verify the voltage and current ratings are within limits. Test continuity of the contacts with a multimeter.

Intermittent operation

Inspect for debris or foreign objects around the actuator. Check for vibration causing partial actuation. Ensure the mounting is secure and the switch is not being subjected to excessive force beyond its rating.

IP rating compromised (water/dust ingress)

Inspect the housing and cable entries for damage. Ensure all seals are intact and covers are securely fastened. Replace the unit if significant ingress is detected.

Pros and Cons

Pros

  • Robust construction with high IP ratings (IP66/IP67) for harsh environments.
  • Versatile contact configuration (1 NO, 1 NC) suitable for various control tasks.
  • Easy and quick wiring with Cage Clamp spring-loaded connectors.
  • Wide operating temperature range (-25 °C to +70 °C) for broad application.
  • Compliance with EN 50047 Form B standard.

Cons

  • Non-electronic output limits integration with advanced digital control systems.
  • Rounded plunger actuator may require precise alignment for consistent triggering.
  • Maximum switching current of 6A might be insufficient for high-power applications.
  • Plastic housing, while durable, may not withstand extreme physical impact compared to metal alternatives.

Setup, Compatibility & Care

Setup:

  1. Mounting: Securely mount the switch in the desired location, ensuring the actuator path aligns with the moving component.
  2. Wiring: Connect wires to the Cage Clamp terminals. Insert a stripped wire end into the terminal opening and the clamp will secure it automatically. Ensure correct connection of NO and NC contacts based on your circuit design.
  3. Actuator Adjustment: If applicable, ensure the plunger or actuator mechanism is correctly positioned to be triggered by the moving part at the desired point.

Compatibility:

  • Voltage/Current: Suitable for AC circuits up to 400V (6A at 125-240V AC) and DC circuits up to 230V (0.8A at 125V DC, 0.3A at 230V DC).
  • Environmental: Designed for ambient temperatures from -25 °C to +70 °C and protected against dust and water (IP66/IP67).
  • Standards: Complies with EN 50047 Form B.

Care:

  • Cleaning: Use a dry or slightly damp cloth to clean the exterior housing. Avoid harsh chemicals or solvents that could damage the plastic.
  • Inspection: Periodically inspect the actuator for damage or obstruction and check wiring connections for tightness.
  • Actuator Maintenance: Ensure the plunger moves freely. If sticking occurs, check for debris or misalignment.

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