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Delay access to hazardous areas until conditions are safe; use these switches with machines that take time to stop after they are turned off. Mount the switch to the door frame and mount the key to the door so that the key is inserted into the switch when the door is closed. When the door is pulled, the key is held in place with 225 lbs. of force until the switch receives a signal from a time-delay relay, motion sensor, or position sensor (not included) that the machine’s motion has stopped. After the motion has stopped, the key can be removed from the switch, releasing the access door. They’re often used with machine guards. All have positive-force, normally-closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick. They’re rated for protection from washdowns and temporary submersion.

Style A and B have a key entry on the top and side of the switch.

Style C has a key entry on two opposite sides of the switch.

Emergency override keys (sold separately) bypass the access delay feature.

For technical drawings and 3-D models, click on a part number.

Replace access door hinges with these switches; they actuate when the door opens at least 4°. Also known as interlock switches, they ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. All have positive-force, normally-closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick. In addition to access doors, these switches can also be used on machine guards constructed from aluminum T-slotted framing. They’re rated IP65 for protection from washdowns.

For technical drawings and 3-D models, click on a part number.

Turn fans, lights, alarms, and other components mounted inside an enclosure on or off when you open or close the enclosure door. Designed to work with a variety of enclosures, these switches have an adjustable housing that lets you alter the length of the switching travel up to 1 3/8". They also have mounting slots, so you can mount screws anywhere along the 0.81" slot length.

Normally open switches turn a component on when you close the door.

Normally closed switches turn a component on when you open the door.

Normally open and normally closed switches control two components at the same time. Use them to turn one component on while also turning another one off when you open the door.

For technical drawings and 3-D models, click on a part number.