D4N Limit switches Limit switch with plastic housing The D4N series of limit switches in plastic housing is the ideal switch for all standard mechanical position detection applications both for safety and non-safety applications. • Direct opening mechanism and approval by notified body • Rugged plastic housing with double insulation • Wide range of actuators • M12 connectors or terminal block with M20 conduit Ordering information Actuator type Connection method Order code*1 1NC/1NO (snap-action) 1NC/1NO (slow-action) 2NC (slow-action) 2NC/1NO (slow-action) Order code Order code Order code Order code Roller lever (resin lever, resin roller) M20 D4N-4120 D4N-4A20 D4N-4B20 D4N-4C20 M12 connector D4N-9120 D4N-9A20 D4N-9B20 – Plunger M20 D4N-4131 D4N-4A31 D4N-4B31 – M12 connector D4N-9131 D4N-9A31 D4N-9B31 – Roller plunger M20 D4N-4132 D4N-4A32 D4N-4B32 D4N-4C32 M12 connector D4N-9132 D4N-9A32 D4N-9B32 – One-way roller arm lever (horizontal) M20 D4N-4162 D4N-4A62 D4N-4B62 D4N-4C62 M12 connector D4N-9162 D4N-9A62 D4N-9B62 – One-way roller arm lever (vertical) M20 D4N-4172 D4N-4A72 D4N-4B72 – Adjustable roller lever, form lock (metal lever, resin roller) Adjustable roller lever, form lock (metal lever, rubber roller) M20 D4N-412G D4N-4A2G D4N-4B2G – M12 connector D4N-912G D4N-9A2G D4N-9B2G – M20 D4N-412H D4N-4A2H D4N-4B2H – M12 connector D4N-912H D4N-9A2H D4N-9B2H – Switches with MBB contacts MBB (Make Before Break) contacts have an overlapping structure, so that before the normally closed (NC) contact opens the normally open (NO) contact closes. Actuator type Connection method Order code*1 1NC/1NO (slow-action) 2NC/1NO (slow-action) Roller lever (resin lever, resin roller) M20 D4N-4E20 D4N-4F20 M12 connector D4N-9E20 – Roller plunger M20 D4N-4E32 D4N-4F32 M12 connector D4N-9E32 – One-way roller arm lever (horizontal) M20 D4N-4E62 D4N-4F62 M12 connector D4N-9E62 – *1 The NC contacts provide the approved direct opening mechanism. 286 D4N Limit switches Specifications Durability*1 Mechanical 15,000,000 operations min.*2 Electrical 500,000 operations min. for a resistive load of 3 A at 250 VAC 300,000 operations min. for a resistive load of 10 A at 250 VAC Operating speed Roller lever 1 mm/s to 0.5 m/s Operating frequency 30 operations/minute max. Minimum applicable load Resistive load of 1 mA at 5 VDC (N-level reference value) Protection against electric shock Class II (double insulation) Pollution degree (operating environment) 3 (EN60947-5-1) Contact gap Snap-action: 2x0.5 mm min Slow-action: 2x2 mm min Conditional short-circuit current 100 A (EN60947-5-1) Rated open thermal current (Ith) 10 A (EN60947-5-1) Ambient temperature Operating –30 to 70C with no icing Degree of protection IP67 (EN60947-5-1) *1 The durability is acquired for an ambient temperature of 5 to 35°C and an ambient humidity of 40% to 70%. *2 10,000,000 operations min. for fork lever actuator. 1NO/1NC Contact (Snap-action) If metal deposition between mating contacts occurs on the NC contact side, they can be pulled apart by the shearing force and tensile force generated when part B of the safety cam or plunger engages part A of the movable contact blade. When the safety cam or plunger is moved in the direction of the arrow, the Limit Switch releases. 1. When metal deposition occurs. 2. When contacts are being pulled apart. Movable contact 3. When contacts are completely pulled apart. Movable contact blade Fixed contact (NC) Plunger Safety cam Safety cam directly pushes up the movable contact blade. 1NC/1NO Contact (Slow-action) 2NC Contact (Slow-action) Fixed contact (NC) Fixed contact (NC) Contact spring Return spring Movable contact Plunger Contact spring Return spring Movable contact Plunger Fixed contact (NO) NC contacts conform to EN60947-5-1 Direct Opening When metal deposition occurs, the contacts are separated from each other by the plunger being pushed in. is marked on the product to indicate approval of direct opening. 287
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