The Honeywell 4LS1 limit switch features a side-plunger actuator and a SPDT contact configuration with one normally open (NO) and one normally closed (NC) output. It is used for end-of-travel and position sensing in industrial automation and machinery, where displacement of the side plunger toggles the switch state. The model is identified by Honeywell as 4LS1 with SPDT-1NO 1NC contacts.
