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.

Activate or deactivate fans, lights, and other devices inside your enclosure when you open or close the door. These switches work with most enclosures, since you can slide the housing up to 1 3/8” to make the switch longer or shorter. Mount screws anywhere along the mounting slots to install.

Normally open switches activate a device such as a fan when you close the door.

Normally closed switches set off an alarm, light, or other device when you open the door.

Normally open and normally closed switches control two devices at the same time—for example, use them to turn a light on and a fan off when you open the door.

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