Guard Locking Safety Door Switch from Omron STI Boasts World's Top Holding Force of Any Switch in it's Class
D4JL models are available with rear release buttons that allow workers to unlock the switch from inside the protected area and exit the hazardous areas. Trapped key models are also available, and are designed to prevent workers from being locked in hazardous work areas. With trapped key models, the door can be opened only by supplying power to the solenoid to release the trapped key lock, and then turning and removing the trapped key. As long as a person has the trapped key when he enters a hazardous area, he cannot be accidentally locked inside. It is not possible to enter the hazardous area without the trapped key because the trapped key must be removed to open the door. Thirty different types of trapped keys are available for use in applications with adjacent hazardous areas.