![[OMRON] — D4B-[]N Safety Limit Switch (Direct Opening, Roller/Plunger, G1/2+M20, Snap+Slow)](https://img.prosourcemro.com/2026/05/001-484-1024x1024.png)
Limit Switches
Omron
[OMRON] — D4B-[]N Safety Limit Switch (Direct Opening, Roller/Plunger, G1/2+M20, Snap+Slow)
Family ID: OMRON-D4B-SAFETY
Robust safety limit switch with metal housing Slow-action and snap-action contact with certified direct opening operation certification.
24 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| D4B-2111N | D4B Safety Roller lever (resin roller) G1/2 (PF1/2) 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-4111N | D4B Safety Roller lever (resin roller) M20 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: M20 | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-2511N | D4B Safety Roller lever (resin roller) G1/2 (PF1/2) 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-4511N | D4B Safety Roller lever (resin roller) M20 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: M20 | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-2A11N | D4B Safety Roller lever (resin roller) G1/2 (PF1/2) 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: G1/2 (PF1/2) | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-4A11N | D4B Safety Roller lever (resin roller) M20 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (resin roller) | Conduit: M20 | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-2115N | D4B Safety Roller lever (stainless steel roller) G1/2 (PF1/2) 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-4115N | D4B Safety Roller lever (stainless steel roller) M20 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: M20 | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-2515N | D4B Safety Roller lever (stainless steel roller) G1/2 (PF1/2) 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-4515N | D4B Safety Roller lever (stainless steel roller) M20 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: M20 | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-2A15N | D4B Safety Roller lever (stainless steel roller) G1/2 (PF1/2) 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: G1/2 (PF1/2) | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-4A15N | D4B Safety Roller lever (stainless steel roller) M20 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller lever (stainless steel roller) | Conduit: M20 | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-2170N | D4B Safety Plunger G1/2 (PF1/2) 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-4170N | D4B Safety Plunger M20 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: M20 | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-2570N | D4B Safety Plunger G1/2 (PF1/2) 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-4570N | D4B Safety Plunger M20 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: M20 | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-2A70N | D4B Safety Plunger G1/2 (PF1/2) 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: G1/2 (PF1/2) | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-4A70N | D4B Safety Plunger M20 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Plunger | Conduit: M20 | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-2171N | D4B Safety Roller plunger G1/2 (PF1/2) 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-4171N | D4B Safety Roller plunger M20 1NC/1NO Snap-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: M20 | Contacts: 1NC/1NO | Action: Snap-action | Housing: Metal | ||
| D4B-2571N | D4B Safety Roller plunger G1/2 (PF1/2) 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: G1/2 (PF1/2) | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-4571N | D4B Safety Roller plunger M20 1NC/1NO Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: M20 | Contacts: 1NC/1NO | Action: Slow-action | Housing: Metal | ||
| D4B-2A71N | D4B Safety Roller plunger G1/2 (PF1/2) 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: G1/2 (PF1/2) | Contacts: 2NC | Action: Slow-action | Housing: Metal | ||
| D4B-4A71N | D4B Safety Roller plunger M20 2NC Slow-action | OMRON | Type: Safety Limit Switch (Direct Opening Mechanism) | Actuator: Roller plunger | Conduit: M20 | Contacts: 2NC | Action: Slow-action | Housing: Metal |
