The ABB 2TLA050070R3108 is a safety switch with an M8 quick-connect (QC) termination and a contact configuration of 2 normally closed and 1 normally open (2NC/1NO). It sits in the Specialized Switches category under Safety Switches, meaning it is intended for use in safety circuits where a positive-break, force-guided contact set is required to reliably signal a guard door or interlock position to the safety controller.
Contact configuration and deployment context
The 2NC/1NO contact arrangement is typical for safety interlock switches: the two normally closed contacts provide a redundant, monitored path to the safety relay or safety PLC input, while the normally open contact can be used for a status indication back to the standard control system. The M8 quick-connect termination reduces wiring time in the panel — no need to open the switch housing for field wiring. This switch is commonly deployed on guard doors, hinged access panels, and removable machine guards where a positive-opening mechanism is required to meet ISO 14119 and IEC 60947-5-1.