Omron E3FA-RP11 2M Retroreflective Photoelectric Sensor
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A. Product Overview
The Omron E3FA-RP11 2M 4m PNP Retroreflective Photoelectric Sensor belongs to the Omron E3FA family of cylindrical industrial photoelectric sensors. It is a straight type sensor with a plastic housing, retroreflective sensing with MSR function, PNP output, and a factory-fitted 2 m cable.
The sensor is designed for industrial applications where machines need fast and dependable object detection. Omron describes the E3FA series as compact, easy to install, easy to align, and suitable for applications in food and beverage, textiles, ceramics, brick production, logistics, and other automation environments.
Key Specifications
| Specification | Details |
|---|---|
| Brand | Omron |
| Model | E3FA-RP11 2M |
| Sensor Type | Retroreflective photoelectric sensor with MSR function |
| Output | PNP open collector |
| Sensing Distance | 0.1 to 4 m with E39-R1S reflector |
| Light Source | Red LED, 624 nm |
| Supply Voltage | 10 to 30 VDC |
| Load Current | 100 mA maximum |
| Response Time | 0.5 ms |
| Operating Mode | Light ON and Dark ON selectable by wiring |
| Connection | Pre-wired |
| Cable Length | 2 m |
| Housing | ABS plastic |
| Protection | IP67 and IP69K |
| Adjustment | One-turn sensitivity adjuster |
These ratings are specified by Omron for the E3FA retroreflective models.
B. Working Principle
The Omron E3FA-RP11 2M works using the retroreflective photoelectric sensing principle.
The sensor emits visible red light toward a reflector positioned opposite the sensor. Under normal conditions, the reflector returns the light to the sensor receiver. When a box, component, product, container, or other opaque object moves between the sensor and reflector, the returning light beam is interrupted.
The sensor detects this change and switches its PNP output. This output can then be used by a PLC, relay, counter, controller, or other industrial control system.
The E3FA-RP11 2M supports both Light ON and Dark ON operation, selected through wiring. Its response time is approximately 0.5 ms, making it suitable for fast industrial detection tasks.
For the rated sensing distance of 0.1 to 4 m, Omron specifies use with the E39-R1S reflector. The reflector is sold separately.
C. Why is the Omron E3FA-RP11 2M Used?
The Omron E3FA-RP11 2M is used when a machine needs reliable non-contact detection of moving or stationary objects.
Common purposes include:
- Detecting products on conveyor systems
- Counting boxes, cartons, containers, and components
- Detecting object presence or absence
- Position detection in automated machinery
- Triggering machine sequences through a PLC
- Product detection in packaging machines
- Material handling and logistics automation
- Detection in production and assembly lines
- Automated sorting systems
- Industrial machine monitoring
The E3FA series is specifically designed for reliable detection and includes high EMC protection, high light immunity, a robust housing, and sensing stability in environments where dust or vibration may be present.
D. Suitable Buyers
The Omron E3FA-RP11 2M photoelectric sensor is suitable for:
Machine manufacturers, industrial automation companies, control panel builders, PLC system integrators, conveyor manufacturers, packaging machine manufacturers, material handling companies, production plants, warehouse automation companies, OEM machine builders, maintenance departments, factory automation engineers, electrical contractors, industrial distributors, food and beverage machinery manufacturers, textile machinery manufacturers, logistics companies, and manufacturing plants.
Omron specifically identifies industrial applications including food and beverage, textiles, ceramics, brick production, and logistics for the E3FA family.
Frequently Asked Questions
1. What is the Omron E3FA-RP11 2M?
The Omron E3FA-RP11 2M is a PNP retroreflective photoelectric sensor from the E3FA series with a pre-wired 2 m cable.
2. What is the sensing range of the E3FA-RP11 2M?
The rated sensing distance is 0.1 to 4 m when used with the Omron E39-R1S reflector.
3. Is E3FA-RP11 2M a PNP or NPN sensor?
The E3FA-RP11 2M is a PNP output model. Omron's model numbering identifies "P" as PNP output.
4. What power supply does the E3FA-RP11 2M require?
It operates from a 10 to 30 VDC power supply.
5. Does the Omron E3FA-RP11 2M come with a cable?
Yes. The E3FA-RP11 2M is a pre-wired model with a 2 m cable. The E3FA pre-wired dimensions section also specifies a standard cable length of 2 m.
6. Is the reflector included with the sensor?
No. Omron states that the reflector is not supplied with retroreflective sensors and must be ordered separately. For this model, the E39-R1S reflector is specified for the rated sensing distance.
7. Does the E3FA-RP11 2M support Light ON and Dark ON?
Yes. Light ON and Dark ON operation can be selected through wiring.
8. What is the response time?
The sensor has a 0.5 ms response time, making it suitable for fast object detection in industrial automation systems.
9. What is the protection rating?
The E3FA series straight type sensors are rated IP67 and IP69K, providing strong protection for demanding industrial installations.
10. What type of light does the E3FA-RP11 2M use?
It uses a red LED with a wavelength of 624 nm.
11. Can the E3FA-RP11 2M connect to a PLC?
Yes. Its PNP open collector output can be interfaced with compatible industrial PLC digital inputs and control systems, provided the electrical ratings and wiring requirements are followed.
12. Can this sensor be used as a personnel safety sensor?
No. Omron specifically states that the product is not designed or rated for directly or indirectly ensuring the safety of persons.
13. Where is the Omron E3FA-RP11 2M commonly used?
Typical applications include conveyor systems, packaging machinery, logistics automation, production lines, product counting, object detection, positioning, material handling, and general factory automation.