Omron D4JL Series Solenoid Interlock Switch, Power to Unlock, 24V dc

These plastic guard lock safety door switches from Omron rank among the strongest in the world with a holding force of 3,000 N, making them suitable for large, heavy doors.

Two safety circuits and two monitor contacts provide an array of monitoring patterns
Standard gold clad contacts enable use with ordinary loads and microloads
IP67 degree of protection

Model with rear release buttons allow people to unlock the switch and escape if they are locked into hazardous areas.