Allen Bradley Guardmaster Roller Plunger Limit Switch, 2NC/1NO Configuration, M20 Connection - 440P-CRPB12B This limit switch from Rockwell Automation's Allen Bradley Guardmaster range is designed to detect the position of objects in your industrial equipment. It features an operating head that you can rotate up to 90° for ease of installation in awkward spaces. Thanks to a mechanical life of 10,000,000 cycles, you can rely on the switch for longevity. A broad operating temperature range between -25°C and +80°C, makes it suitable for use in demanding environments. • Can be mounted in any position for design flexibility
• Glass-filled polybutylene terephthalate (PBT) body is resistant to impacts and corrosion for durability
• IP66 (ingress protection) rating means it's dustproof and protected against strong jets of water
• Switching speed ranges between 100mm/min and 250mm/s for rapid operation Standards and Certifications • EN954-1 (European Norm)
• cULus (Underwriters' Laboratories in Canada and the US)
• TUV (Technical Inspection Association)
• CE (Conformitè Europëenne) These 22 mm plastic-body safety limit switches conform to EN 50047 standards and are available with snap-acting or slow-break/make 2- or 3-contact configurations as well as a variety of actuator heads. These switches also feature an optional rotating head that can be adjusted in 90° increments before installation to allow for ease of mounting. Allen-Bradley Guardmaster limit switches can be used in guard door applications as well as on moving machine beds, crane arms, lifts, elevators, etc. How does a limit switch work? Large selection of actuator heads
Positive operation, forced disconnection of contacts
Snap-acting, slow make before break or slow break before make contact blocks When the roller plunger actuator makes contact with an object, it sends a signal to the switch contacts to open or close the electrical circuits.