Limit Switches Limit Switches LS2 LS3 & LS4 Limit SwitchesABB limit switches are an easy and reliable way to convert mechanical movements into electrical signals. Publications BrochuresCatalogs and Buyers GuidesCertificates/Declarations of Conformity Other Controls & Protective Relays Economic & DIN Rail Range Power Supplies High Performance & Buffer Range Power Supplies Standard Range Time Relays Previous Generation Relays, Timers & Control Measuring & Monitoring Relays Interface Relays & Optocouplers Primary Switched-Mode Power Supplies Limit Switches