Safety Interlock Switches are designed for mounting on a door or a cover, so that when the door or other part is opened, they open automatically. They prevent the gear shift lever from moving until the brake is applied. These safety switches are generally used in woodworking machinery, paper finishing equipment, plastic molding equipment, printing machinery, packaging wrapping, and specialty equipment, among others.

GKNA21 Safety Interlock Switch from Honeywell is designed to deliver reliable performance for various industrial applications. This Honeywell Switch is available with a choice of six actuator keys to provide design flexibility. It has an expected mechanical life of 500, 000 cycles. Featuring double-insulation, it does not need any additional earthing requirements.