Overview
The Allen-Bradley 42EF-P2MPB-F4 is a PHOTOSWITCH photoelectric sensor engineered for industrial detection applications requiring precision and durability. This RightSight-designed polarized retroreflective sensor combines visible red LED illumination with PNP output switching to provide reliable object detection across a 3-meter sensing range. Built with an 18mm cylindrical polymer housing, this sensor features complementary Light-On (LO) and Dark-On (DO) outputs for flexible logic configuration and includes integrated IO-Link communication for diagnostics and status monitoring.
Key Features
- Polarized retroreflective sensing mode eliminates false triggers from ambient light and specular reflections
- IO-Link enabled for real-time sensor diagnostics and parameter configuration
- Complementary PNP outputs (Light-On and Dark-On) for flexible switching logic
- Visible red LED light source with 3-meter maximum sensing distance
- Rugged 18mm cylindrical design with threaded and cable mount options
- Fast 1 millisecond response time for high-speed detection applications
Technical Specifications
- Supply Voltage: 10.8 to 30 VDC
- Output Current: 100 mA maximum
- Output Type: PNP (Source), complementary LO/DO
- Sensing Range: 3 meters (3,000 mm)
- Response Time: 1 millisecond
- Light Source: Visible red LED
- Sensing Mode: Polarized retroreflective
- Field of View: 7 degrees
- Housing Material: Polymer
- Mounting: 18mm cylindrical, front through-hole, threaded and cable mount
- Connector: 4-pin micro quick-disconnect on 152mm (6 inch) pigtail cable
- IP Rating: IP67 (dust and water resistant)
- Operating Temperature: −25°C to +70°C
- Weight: 0.10 lbs
- Certifications: CE, CSA, IEC 947-5-2, NEMA 3R, NEMA 4X, NEMA 6P, UL
- Communication Protocol: IO-Link
Typical Applications
The 42EF-P2MPB-F4 is ideal for:
- Conveyor system part detection and jam sensing
- Packaging machinery object presence verification
- Automated assembly line alignment and positioning
- Liquid level detection with retroreflective targets
- Industrial motion control and automation systems requiring high-speed response
- Applications where environmental lighting or polished surfaces cause false triggers
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix programmable logic controllers
- Rockwell Automation safety controllers and PLCs
- Any standard 10.8−30 VDC industrial automation system
- IO-Link-capable master modules and industrial switches
- Studio 5000 Automation Engineering & Design Environment
Replaces / Drop-In Replacement For
The 42EF-P2MPB-F4 is a direct upgrade in the 42EF RightSight family. For alternative connector styles and cable lengths, refer to replacement options with different suffixes (-A2 for 2m cable without connector, -Y4 for M8 pico connector). Verify compatibility with your system integrator before ordering alternative configurations.
Works With
- Studio 5000 Automation Engineering & Design Environment
- Rockwell Automation FactoryTalk View
- IO-Link Masters and IO-Link Hubs
- EtherNet/IP networks via IO-Link gateway
- Allen-Bradley Flex I/O and CompactLogix analog/digital input modules


















