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    • SCHNEIDER XB4BS9442 Harmony XB4 Emergency Stop Push Button

      The SCHNEIDER XB4BS9442 is a Harmony XB4 metal emergency stop / emergency switching-off push button with a red 40 mm mushroom head, 22 mm mounting diameter, 1NC contact, and key release. The supplied key is Ronis 455.

      Key Technical Specifications

      Parameter	Specification
      Brand	Schneider Electric
      Model	XB4BS9442
      Product Family	Harmony XB4
      Product Type	Emergency Stop Push Button
      Head Type	Red Mushroom
      Mushroom Diameter	40 mm
      Mounting Diameter	22 mm
      Operator Action	Trigger action + mechanical latching
      Reset Method	Key release
      Key	Ronis 455
      Contacts	1NC
      Contact Terminals	21-22
      Contact Operation	Slow-break
      Positive Opening	Yes
      Bezel Material	Chrome-plated metal
      Fixing Collar	Zamak
      Protection	IP66
      Dimensions	Approx. 47 × 40 × 104 mm
      Net Weight	Approx. 0.133 kg
      Mounting	Panel mounting

      Schneider specifies the device for standard 22 mm panel cutouts, with screw-clamp terminals and a mechanical latching emergency-stop mechanism.

      Advantages & Features

      • Large 40 mm red mushroom head for easy emergency identification
      • Mechanical latching for reliable emergency-stop operation
      • Key-release reset helps prevent unauthorized reset
      • 1NC positive-opening contact
      • Rugged metal construction
      • Suitable for demanding industrial environments
      • Standard 22 mm panel mounting
      • Screw-clamp terminal connection
      • Harmony XB4 modular design

      Typical Applications

      • Industrial machinery
      • Factory automation
      • CNC machines
      • Production lines
      • Conveyor systems
      • Motor control panels
      • Machine safety circuits
      • Industrial control cabinets

      Important Precautions

      • This is an emergency-stop device, so installation and safety-circuit validation should follow the applicable machinery-safety requirements.
      • Verify the 1NC contact configuration (21-22) before wiring.
      • Confirm the panel cutout is suitable for the 22 mm mounting system.
      • The key-release mechanism should be tested after installation.
      • Do not use the emergency-stop button as a normal start/stop control.
      • Check the complete safety circuit and connected contactors/relays before commissioning.

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