OMRON E3FA-RN21 Photoelectric Sensor

The OMRON E3FA-RN21 is a reliable and versatile photoelectric sensor designed for a wide range of applications. This sensor features a retro-reflective sensing method, offering a detection range of 0.1 to 4 meters. Its robust design includes a durable M18 threaded barrel made from ABS plastic, ensuring durability and ease of installation in various environments.

Key Features

• Sensing Method: Retro-reflective with Multi-Surface Reflection (MSR) functionality.
• Sensing Distance: Up to 4 meters, with a minimum distance of 100 mm.
• Output Type: NPN, allowing for efficient integration into most control systems.
• Operation Modes: Both Light-ON and Dark-ON modes are available, providing flexibility in different applications.
• Response Time: Rapid response of 0.5 milliseconds.
• Power Supply: Operates on a DC voltage of 10 to 30 volts.
• Connection Method: Convenient M12 connector for easy setup.

Design and Build

The E3FA-RN21 features a cylindrical axial shape, ensuring straightforward mounting and alignment. Its compact size, with a length of 45 mm, makes it suitable for installations where space is limited. The ABS housing provides excellent environmental resistance, with an IP67/IP69K rating for protection against dust and water.

Technical Specifications

• Type of Light: Polarized red LED with a wavelength of 624 nm.
• Operating Temperature: Ranges from -25°C to 55°C, ensuring performance in various conditions.
• Ambient Illuminance: Resistant to incandescent lamps up to 3,000 lux and sunlight up to 10,000 lux.

Unique Selling Points

• Easy Adjustment: Features a robust adjuster for simple sensitivity setting.
• High Visibility LED: The bright red LED facilitates easy alignment, even over longer distances.
• Safety and Protection: Includes output short-circuit protection, output reverse polarity protection, and power supply reverse polarity protection.

Safety and Compatibility

The E3FA-RN21 does not include a reflector, which must be ordered separately, such as the E39-R1S. It is not suitable for safety functions and does not support communication interfaces. However, it offers reliable performance in general industrial automation environments.

This sensor is an ideal choice for applications requiring reliable performance.