The Series 61 compact emergency stop switch features a mono-block design with a fool-proof, mechanically decoupled triggering action. With a minimal 21.2-mm back panel depth, this stop switch is suitable for handheld control units or easy-access mounting directly to machines. Optional LED illumination ensures the status is visible in all lighting conditions. Each switch is available with as many as three individually normally open (NO) or normally closed (NC) contacts and a 27- or 40-mm-diameter lens. The switch complies with such international standards as IP69K and IP67 sealing. This front protection ensures reliable functionality in even adverse conditions.