ABB 2TLA050204R1333 LineStrong3D Safety Switch, 4NC/4NO

The ABB 2TLA050204R1333 is a LineStrong3D safety switch carrying 4NC/4NO contacts — four normally-closed and four normally-open positions. That contact arrangement gives you dual-channel safety monitoring plus auxiliary feedback in a single housing, typical for guarding applications where the NC channels wire into the safety relay or controller and the NO contacts signal door status back to the PLC. Listed under Specialized Switches > Safety Switches, this is a dedicated safety-rated device, not a general-purpose limit switch. The 4NC side handles the redundant safety circuit; the 4NO side handles the status indication. On a machine guard door or access hatch, that means one device covers both the safety loop and the diagnostic feedback without a separate auxiliary block.