ABB 2TLA050003R1101 MKEY5+ NPT 2N Key Interlock, Current Act

The 2TLA050003R1101: The MKEY5+ series is a modular safety interlock system used to guard access to hazardous machinery — common on guarding doors, gates, and removable covers in automated production lines. The NPT designation indicates the actuator key is trapped in the head until the machine cycle completes, preventing unsafe access. The 2N contact block provides two normally-closed safety contacts for integration into a safety circuit, typically monitored by a safety relay or PLC safety input.