Overview
The Omron E3F2-R2B4-P1 is a retroreflective photoelectric sensor engineered for demanding industrial applications requiring stable, long-distance detection. This M18 cylindrical sensor operates via reflected light off a supplied reflector, making it ideal for detecting objects on conveyor systems, packaging lines, and assembly equipment where through-beam installation is impractical.
Key Features
- Retroreflective sensing method with included E39-R1 reflector—no separate receiver required
- 2-meter maximum sensing distance for versatile mounting options
- PNP output with switchable DARK-ON/LIGHT-ON logic via connector pin configuration
- M18 cylindrical body with M12 4-pin connector for sealed, plug-and-play installation
- 10–30 VDC operation with 100 mA output capacity
- IP67-rated housing for washdown and dusty environments
Technical Specifications
| Parameter | Value |
| Part Number | E3F2-R2B4-P1 |
| Sensing Method | Retroreflective (non-polarizing) |
| Sensing Range | 0.1–2 m |
| Detection Logic | DARK-ON, LIGHT-ON (selectable) |
| Output Type | PNP, transistor |
| Output Current | 100 mA (max.) |
| Supply Voltage | 10–30 VDC |
| Housing | M18 cylindrical, plastic |
| Connection | M12 4-pin connector (IP67) |
| Cable Length | 2 m standard (custom lengths available) |
| Operating Temperature | −10 to +50 °C |
| IP Rating | IP67 |
| Included Reflector | E39-R1 |
Typical Applications
- Conveyor Systems: Detect product presence, gaps, or orientation on moving lines
- Packaging: Monitor box fill, seal verification, and labeling accuracy
- Material Handling: Track pallets, containers, and parts in warehouse automation
- Assembly: Position feedback and part-presence confirmation in robotic or manual assembly
- Print & Label: Mark detection and registration control on printing equipment
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLC inputs (via appropriate I/O modules)
- Siemens S7-1200, S7-1500, and Simatic controllers with digital input cards
- Omron CJ-series, CS-series, and NJ-series controllers
- Mitsubishi FX and Q-series PLCs with 24 VDC input modules
- Any industrial controller with 10–30 VDC PNP input capability
- EtherNet/IP, PROFINET, and CC-Link networks (via industrial communication gateways)
Replaces / Drop-In Replacement For
- Omron E3F2-R2C4-P1 (NPN variant—same specs, opposite output polarity)
- Omron E3F2-R4B4F-P1 (polarizing model with extended 0.1–4 m range, where reflector distance is greater)
- Other M18 retroreflective sensors with M12 connectors and 10–30 VDC input when pin-compatible
Works With
- Programming Platforms: Studio 5000 (Logix), TIA Portal, GX Developer, Sysmac Studio
- Protocols: EtherNet/IP gateway modules, PROFINET IO-Link adapters, Modbus RTU over serial gateways
- Safety Systems: Non-safety-rated detection; confirm with system architect before use in safety-critical circuits
- Reflectors: Omron E39-R1 or E39-R1S reflector cartridges
