Omron D4B-4111N Safety Limit Switch SPDT Metal Enclosure IP67
SKU: D4B-4111NUSD 22.00
Omron D4B-4111N is a SPDT safety limit switch with metal enclosure, IP67 protection, direct opening action for industrial safety applications.
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Product Overview
The D4B-4111N is used to deliver repeatable machine-state detection for sequencing, interlocks, and process confirmation. Whether in packaging, handling, or assembly systems, this sensing class helps reduce false triggers and improves control confidence under continuous operation.
Repeatable State Detection
Accurate detection at the right process moment improves sequence integrity and reduces quality escapes caused by timing uncertainty or missed events.
Fit for Demanding Machine Environments
Industrial sensing components are selected for stability under vibration, contamination, and repetitive duty where consumer-grade devices are not suitable.
Faster Commissioning and Replacement
Standardized sensor families simplify spare strategy, reduce replacement errors, and support quicker return to production after maintenance events.
Key Features
- Contact Form: 1NC + 1NO (slow make/slow break)
- Contact Rating: 5A at 250VAC (AC-15)
- Enclosure: Die-cast aluminum
- Direct Opening: Yes (NC contacts)
- Protection Rating: IP67
- Operating Temperature: -25 to +70°C
- SKU: D4B-4111N
- Series: D4B
Best-Fit Applications
- Provides stable detection signals to PLC logic
- Improves sequence timing accuracy
- Reduces dependence on mechanical contact methods
- Supports high-cycle production operation
- Enables better fault isolation at machine stations
- Simplifies maintenance through standard sensor families
Buying Checklist
- Repeatable industrial detection behavior
- Designed for continuous machine duty
- Improves process timing confidence
- Serviceable and standardizable selection
- Reliable fit for automation sensing layers
Technical Specifications
| Model | D4B-4111N |
|---|---|
| Series | D4B |
| Type | Safety Limit Switch |
| Contact Form | 1NC + 1NO (slow make/slow break) |
| Contact Rating | 5A at 250VAC (AC-15) |
| Enclosure | Die-cast aluminum |
| Direct Opening | Yes (NC contacts) |
| Protection Rating | IP67 |
| Operating Temperature | -25 to +70°C |
| Actuator Type | Roller plunger |
| Mechanical Life | 5 million operations |
| Conduit Size | G1/2 or 1/2-14NPT |
| Mounting | Panel or surface mount |
| Safety Category | Category 3, PL d (when properly applied) |
| Certifications | CE, UL, CSA, CCC |
Resources & Downloads
FAQ for D4B-4111N
What is direct opening action and why is it important for safety?
Direct opening action means NC contacts are opened by direct mechanical force from actuator, not by spring. Even if contacts weld, the actuator physically forces them open. This is required by safety standards (ISO 14119) for safety interlock applications.
What safety category can I achieve with this switch?
When used in properly designed safety circuit with redundancy and monitoring, D4B can achieve Category 3, Performance Level d (PL d) per ISO 13849-1. For Category 4/PL e, use D4NL series with forced guided contacts.
What's the difference between D4B and D4N series?
D4B: metal enclosure, IP67, general safety applications. D4N: plastic enclosure, IP67, compact design. Both have direct opening action. Choose D4B for harsh environments (metal housing), D4N for cost-sensitive applications.
How do I wire the NC and NO contacts for safety?
For safety circuits: use NC contacts in series with safety relay/monitor. NO contacts can be used for indication/monitoring. Never use NO contacts alone for safety function. Always follow safety circuit design per ISO 13849-1.
What applications commonly use D4B safety switches?
Machine guard interlocks, access door monitoring, safety gate switches, movable barrier detection, and any application requiring certified safety interlocking with direct opening action.
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