Technical Parameters Parameter Specification Series ABB CR-M Series (Industrial Control Devices) Product Type Emergency Stop Push Button (Mushroom Head, Twist-to-Release) Order Code CR-M4SS Actuator Type Large Mushroom Head (Typically ≥ 40mm diameter) Actuator Material Solid Stainless Steel (Corrosion-resistant, durable) Actuator Color Red with Yellow background ring (Standard for E-Stop per IEC 60204-1) Contact Blocks Sold separately. Compatible with CR-M series contact blocks (e.g., CR-MXT). Typically requires at least 1 NO (Normally Open) and 1 NC (Normally Closed) contact block with positive-guided (force-guided) mechanism for safety circuits. Contact Rating Depends on the attached contact block. Typical: Up to 600V AC, 10A. Mechanical Life Very high, typically > 1,000,000 operations. Electrical Life Depends on contact block and load. Operation Mode Push to activate (lock), Twist clockwise to release and reset. Protection Degree (IP Rating) Front side (actuator): Typically IP65 or higher (Dust-tight and protected against water jets). Behind panel depends on enclosure. Mounting Panel mounting via a mounting collar from the front. Requires a round panel cutout (specific diameter, e.g., 22mm or 30mm). Mounting Hole Diameter Typically 22.5mm or 30.5mm (Must confirm based on exact model). Terminal Connection Screw terminals on the attached contact block(s). Standards Compliance IEC/EN 60947-5-1, IEC/EN 60947-5-5 (for emergency stop function), IEC 60204-1 (Safety of machinery), ISO 13850. Safety Integrity When used with appropriate positively guided contact blocks and safety relays, can contribute to Safety Category (e.g., Cat. 3/4 per ISO 13849-1, SIL 2/3 per IEC 62061). Ambient Temperature -25°C to +70°C (Operation)