The 1SBV010231R1211, manufactured by ABB, is a limit switch with a lever R 13.5mm, plastic roller of diameter 12.5mm, and a NO + NC configuration. It is a power-operated limit switch used for the protection of persons, equipment, and machinery. Its features include a breaking capacity of 10A AC and 7A DC, an operating temperature range of -25°C to +60°C, and an adjustable differential of up to 8 mm. This limit switch is suitable for use in automation and in hazardous environments, such as petrochemical or mining industries. It offers a high degree of mechanical and electrical protection and is designed with snap-action contact for extremely reliable switching.