The L22ER01 is an emergency stop mushroom head control unit with a f 40 mm diameter head designed for safety-critical applications requiring push-turn reset functionality. It features IP 66 protection rating and is housed in a plastic black bezel, making it suitable for harsh industrial environments. The unit is compliant with IEC 60947-5-5 and EN 418/ISO 13850 emergency stop standards, with head position visibility from the side indicated by a yellow collar. The L22ER01 is supplied as a complete unit consisting of the head, clip, and screw electrical blocks pre-assembled, and can be combined with separate clips and electrical blocks for customized configurations. Common applications include emergency stop stations in manufacturing equipment, machinery control panels, and safety-critical industrial systems where reliable emergency shutdown is essential.