The Telemecanique XCKN2121P20 is a compact limit switch from the XC Standard series, designed for lateral position detection using a spring return roller lever plunger with thermoplastic construction. It features a 1NC+1NO snap action contact arrangement with IP65 protection, suited for industrial machine control applications requiring reliable end-of-travel sensing. Cable entry is via a single M20 x 1.5 tapped entry accepting cable outer diameters of 7…13 mm.

Technical specifications:

• Catalog reference: XCKN2121P20
• Manufacturer: Telemecanique (Schneider Electric)
• Product type: Limit switch, compact form E
• Contact arrangement: 1NC + 1NO, snap action
• Operator type: Spring return roller lever plunger, thermoplastic
• Approach direction: Lateral, 1 direction
• Switch actuation: 30 cam
• Positive opening: Yes, minimum force 10 N
• Minimum tripping force: 6 N
• Maximum actuation speed: 1 m/s
• Rated insulation voltage [Ui]: 500 V (pollution degree 3) per IEC 60947-1
• Rated impulse withstand voltage [Uimp]: 6 kV per IEC 60947-1
• AC-15 rating: 240 V, 3 A (Ie), 10 A (Ithe)
• DC-13 rating: 250 V, 0.1 A
• Electrical connection: Screw-clamp terminals, 1 x 0.34…2 x 1.5 mm
• IP degree of protection: IP65 per IEC 60529
• IK degree of protection: IK04 per IEC 62262
• Mechanical durability: 10,000,000 cycles
• Electrical durability: 5,000,000 cycles per IEC 60947-5-1 appendix C
• Short-circuit protection: 10 A cartridge fuse, type gG
• Operating temperature: -25…70 C
• Storage temperature: -40…70 C
• Dimensions: 30 x 94 x 30 mm (W x H x D)
• Net weight: 0.145 kg
• Certifications: UL, CSA, CCC
• Standards: IEC 60947-5-1, IEC 60204-1, UL 508, CSA C22.2 No 14
• Warranty: 18 months

Features and benefits:

• Snap action contacts with positive opening operation ensure reliable disconnection even under contact welding conditions, as defined by IEC 60947-5-1.
• IP65 sealing protects against dust ingress and water jets, suitable for washdown and dusty industrial environments.
• High mechanical durability of 10,000,000 cycles reduces maintenance requirements in high-cycle applications.
• Compact 30 x 30 mm footprint with body-fixing and elongated mounting holes allows flexible installation in tight machine spaces.
• UL, CSA, and CCC product certifications support deployment across international markets.

Applications:

• End-of-travel detection on linear actuators and pneumatic cylinders in automated machinery.
• Position sensing on conveyor systems to detect carriage or pallet presence at defined stops.
• Machine guarding interlocks where positive opening contacts are required for safety-relevant switching.
• Door and hatch position monitoring on industrial enclosures and access panels.

Also known as: Telemecanique XCKN2121P20, XCKN limit switch, XC Standard roller lever plunger switch.