HS7A-DMC and HS7A-DMP non-contact magnetic safety switches are designed to be used in applications where no contact is desired between the switch and its actuating key, and space is at a premium. HS7A-DMC safety switches work well in combination with our safety relay modules, making them the smallest Category 4 device in the market. The HS7A-DMP interlock safety switch's auxiliary contacts enable PLCs to monitor the door status as operation signals can be read directly by controllers.