The Omron D4NL4AFAB 2 is a guard locking safety-door switch from the D4NL Series, meaning it physically locks the machine guard closed until the safety circuit releases it. This is the type of switch you spec on a hinged door or sliding gate guarding a robot cell, press brake, or packaging machine — anywhere a solenoid lock prevents access until the hazardous motion stops. The IP67 rating means the switch body and the locking mechanism are sealed against dust ingress and temporary immersion in water. On a washdown line or in a dusty mill environment, that seal keeps the internal contacts and solenoid from corroding or jamming.
Contact configuration is 1NO + 1NC — one normally-open channel for the safety monitoring circuit and one normally-closed channel for the feedback loop. The NC contact is the one that proves the door is closed and locked before the machine can start; the NO contact signals the guard position to the safety relay or PLC. Rated at 10 A switching current at 250 V AC, this switch handles the control voltage for most safety relay inputs and small solenoid loads directly. The 500,000-cycle electrical service life and 1 million-cycle mechanical service life give a solid endurance baseline for a production line running several cycles per minute. Dimensions are 88.5 mm wide, 95 mm high, and 35.5 mm deep.
This part is classified at a mature lifecycle stage, meaning it's an established, widely-installed product that Omron continues to support. It is not in a phase-out or last-time-buy window.