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Schneider Electric Push Button - Harmony XB4

Schneider Electric Push Button - Harmony XB4

This is a complete illuminated double-headed push-button with a chromium-plated metal bezel and sp...

Best current price£12.25from eBay

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Product Information

Full details

This Schneider Electric Harmony XB4 illuminated double-headed push-button is designed for industrial control panels and automation systems, offering reliable two-state signaling. Its key benefit is providing clear visual feedback for operational status with a durable metal construction. A potential consideration is its specific voltage requirement of 24V AC/DC. Key features include a chromium-plated metal bezel, spring return operator, 1 normally open (NO) and 1 normally closed (NC) contact, and a standard 22mm mounting diameter.

All features

SeriesHarmony XB4
Model Part NumberXB4BW73731B5
BrandSchneider Electric

Extended Product Information

FAQs

What voltage is required for the illumination?

The button operates on 24V AC/DC for both the contact switching and the illumination.

Can I replace the illumination source if it burns out?

The illumination source is typically integrated into the operator head. Depending on the specific model variant, it may be replaceable or require replacement of the entire head assembly. Refer to the detailed product manual for specifics.

What is the difference between the NO and NC contacts?

NO (Normally Open) contacts are open circuits when the button is not pressed and close when pressed. NC (Normally Closed) contacts are closed circuits when the button is not pressed and open when pressed.

Is this button waterproof?

The Harmony XB4 series generally offers good protection for industrial environments, but specific IP ratings should be checked based on the exact model and panel sealing. It is not designed for submersion.

What is the mounting size?

The mounting diameter required for this button is 22mm.

Can I wire both NO and NC contacts to the same circuit?

Yes, the dual contact configuration allows for separate or combined wiring for different functions within a control circuit.

Troubleshooting

Button does not illuminate.

Check the 24V AC/DC power supply connection to the illumination terminals. Ensure the polarity is correct if using DC and verify the bulb/LED is not faulty.

NO contact does not close when pressed.

Verify wiring to the NO terminal. Ensure the button mechanism is not obstructed and the spring return is functioning. Check if the NC contact is active, which might indicate a wiring error or a faulty internal contact.

NC contact does not open when pressed.

Check wiring to the NC terminal. Confirm the button mechanism is fully depressed. Inspect for damage to the internal contact mechanism.

Button feels stiff or does not return properly.

Clean the button mechanism. Check for any debris or foreign objects obstructing movement. Ensure the button is securely mounted and not misaligned.

Pros and Cons

Pros

  • Robust construction with a metal bezel for industrial durability.
  • Dual contact (NO/NC) provides versatile control options.
  • Illuminated head offers clear visual status indication.
  • Standard 22mm mounting ensures compatibility with many control panels.
  • Suitable for a wide range of automation and control applications.

Cons

  • Requires a specific 24V AC/DC power supply.
  • Illumination requires a separate power source connection.
  • Momentary function may not be suitable for all latching applications.
  • Only one button head is included, despite being double-headed in function.

Setup, Compatibility & Care

Setup:

  1. Ensure the control panel cutout is 22mm in diameter.
  2. Mount the button assembly by inserting it into the cutout and securing it with the provided locking mechanism from behind the panel.
  3. Connect the electrical wiring to the screw clamp terminals for the NO and NC contacts, and to the illumination circuit, respecting the 24V AC/DC voltage rating.
  4. Verify wiring against the circuit diagram and product documentation before energizing.

Compatibility:

  • Compatible with standard 22mm mounting panels.
  • Requires a 24V AC/DC power source for illumination and operation.
  • Suitable for use with programmable logic controllers (PLCs), relays, and other control systems.

Care:

  • Clean the metal bezel and button head with a soft, dry or slightly damp cloth. Avoid abrasive cleaners.
  • Periodically check electrical connections for tightness.
  • Ensure the area around the button is free of excessive dust or debris that could impede the spring return mechanism.

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