Safety Limit Switches. IDEM's LSMM range of Safety Limit Switches are used to signal the achievement of a particular position. The circuit breakers have safety contacts in accordance with IEC 947-5-1 so that they can be used in safety applications.Wide range of levers, 7 different heads, allows the use of switches in almost all systems. The distinguishing feature of this circuit breaker is its small size, metal casing and built-in cable. The cabl..