D4B- N.fm Page 206 Wednesday, October 29, 2008 12:25 PM Safety Limit Switch D4B- N Snap-action contact with certified direct Note: Contact your sales representative for details on models with safety standard certification. opening operation certification . Maintenance, seal, and resistance to shock increased and direct opening mechanism added. Three-conduit switches and 2NC switches are also available. Direct opening mechanism (NC contacts only) added to enable opening contacts when faults occur, such as fused contacts. Safety of lever settings ensured using a mechanism that engages a gear between the operating position indicator plate and the lever. Equipped with a mechanism that indicates the applicable operating zone, as well as push-button switching to control left and right motion. Head seal structure strengthened to improve seal properties (TV: IEC IP67, UL: NEMA 3, 4, 4X, 6P, and 13). Wide standard operating temperature range: 40 to 80 C (standard type). Models with gold-plated contacts added to the series to enable handling microloads. Certified standards: UL, CSA, EN (TV), and CCC. Be sure to read the Safety Precautions on page 219 and the Precautions for All Safety Limit Switches on page 170. Model Number Structure Model Number Legend D4B- N 1 2 3 1. Conduit size 3. Actuator 1: PG13.5 (1-conduit) 00: Switch box (without head) 2: G1/2 (PF1/2) (1-conduit) 11: Roller lever (resin roller) 3: 1/2-14NPT (1-conduit) 15: Roller lever (stainless steel roller) 4: M20 (1 conduit) 1R:Roller lever 5: PG13.5 (3-conduit) (conventional D4B-compatible) 6: G1/2 (PF1/2) (3-conduit) 16: Adjustable roller lever 7: 1/2-14NPT (3-conduit) 17: Adjustable rod lever 8: M20 (3-conduit) 70: Top plunger 2. Built-in Switch 71: Top roller plunger 1: 1NC/1NO (snap-action) 81: Coil spring 3: 1NC/1NO (snap-action) gold-plated contacts 87: Plastic rod 5: 1NC/1NO (slow-action) * 6: 1NC/1NO (slow-action) gold-plated contacts * A: 2NC (slow-action) B: 2NC (slow-action) gold-plated contacts * Excluding D4B- 81N and D4B- 87N models. 1D4B- N.fm Page 207 Wednesday, October 29, 2008 12:25 PM D4B- N Ordering Information Set Model Numbers Safety Limit Switches (with Direct Opening Mechanism) 1NC/1NO (Snap-action) 1NC/1NO (Slow-action) 2NC (Slow-action) Actuator Conduit openings Direct Direct Direct Model Model Model opening opening opening Pg13.5 D4B-1111N D4B-1511N D4B-1A11N G1/2 (PF1/2) D4B-2111N D4B-2511N D4B-2A11N 1/2-14NPT D4B-3111N D4B-3511N D4B-3A11N M20 D4B-4111N D4B-4511N D4B-4A11N Roller lever (resin roller) Pg13.5 (3-conduit) D4B-5111N D4B-5511N D4B-5A11N G1/2 (3-conduit) D4B-6111N D4B-6511N D4B-6A11N 1/2-14NPT (3-conduit) D4B-7111N D4B-7511N D4B-7A11N M20 (3-conduit) D4B-8111N D4B-8511N D4B-8A11N Pg13.5 D4B-1115N D4B-1515N D4B-1A15N G1/2 (PF1/2) D4B-2115N D4B-2515N D4B-2A15N Roller lever (stainless steel 1/2-14NPT D4B-3115N D4B-3515N D4B-3A15N roller) M20 D4B-4115N D4B-4515N D4B-4A15N Pg13.5 (3-conduit) D4B-5115N D4B-5515N D4B-5A15N Pg13.5 D4B-1170N D4B-1570N D4B-1A70N G1/2 (PF1/2) D4B-2170N D4B-2570N D4B-2A70N 1/2-14NPT D4B-3170N D4B-3570N D4B-3A70N M20 D4B-4170N D4B-4570N D4B-4A70N Top plunger Pg13.5 (3-conduit) D4B-5170N D4B-5570N D4B-5A70N G1/2 (3-conduit) D4B-6170N D4B-6570N D4B-6A70N 1/2-14NPT (3-conduit) D4B-7170N D4B-7570N D4B-7A70N M20 (3-conduit) D4B-8170N D4B-8570N D4B-8A70N Pg13.5 D4B-1171N D4B-1571N D4B-1A71N G1/2 (PF1/2) D4B-2171N D4B-2571N D4B-2A71N 1/2-14NPT D4B-3171N D4B-3571N D4B-3A71N M20 D4B-4171N D4B-4571N D4B-4A71N Top roller plunger Pg13.5 (3-conduit) D4B-5171N D4B-5571N D4B-5A71N G1/2 (3-conduit) D4B-6171N D4B-6571N D4B-6A71N 1/2-14NPT (3-conduit) D4B-7171N D4B-7571N D4B-7A71N M20 (3-conduit) D4B-8171N D4B-8571N D4B-8A71N 2