Overview
The Allen-Bradley 42GRF-9002-QD is a standard on/off photoelectric sensor featuring large aperture fiber optic technology. Part of the Series 9000 family, this sensor operates on a wide voltage range of 70-264V AC/DC and includes an SPDT electromagnetic relay output for direct control of pilot devices and contactors. The 2-meter cable with mini quick-disconnect connector enables flexible installation in confined spaces and rapid fixture changes without rewiring.
Key Features
- Large aperture fiber optic design for remote sensing through fiber bundles
- Wide voltage compatibility: 70-264V AC/DC operation
- SPDT electromagnetic relay output for switching loads up to rated contact capacity
- Infrared light source with integrated sensing electronics
- Mini quick-disconnect (QD) connector for fast installation and field replacement
- Compact, rugged construction rated for industrial environments
Technical Specifications
The 42GRF-9002-QD delivers high excess gain and stable operation across temperature variations typical in factory floor conditions. Its relay output configuration allows direct interface with motor starters, solenoid valves, and other AC/DC loads without additional output modules. The large aperture fiber design maximizes light collection from the remote sensor head, improving detection margin in dusty or vibration-prone applications.
Typical Applications
- Conveyor line object detection and counting
- Machine positioning and work-in-progress tracking
- Presence sensing for parts coming off assembly fixtures
- Robotic arm end-of-arm tool presence detection
- Hazardous area sensing with fiber optic cable isolation
- High-temperature or chemically aggressive environment monitoring
Compatibility & Replacements
Compatible With
- Allen-Bradley control systems and PLCs with relay input modules
- Industrial control circuits operating 70-264V AC or DC supply
- Standard fiber optic sensor heads and remote sensing cables
- M12 micro and 5-pin mini quick-disconnect connectors
- Third-party relay input modules accepting SPDT contact closures
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 42GRF-9002-QD features SPDT relay output; ensure replacement applications do not require different output configurations (DC, NPN, PNP). Related models in the 42GR family (42GRC, 42GRL, 42GRP, 42GRR, 42GRU) offer alternative sensing modes and outputs.
Works With
- Rockwell Automation Studio 5000 and RSLogix platforms (via relay input cards)
- Allen-Bradley CompactLogix, ControlLogix, and MicroLogix controllers with analog or relay input modules
- PLC ladder logic programs using standard input/output instructions
- Industrial relay banks and switching circuitry
- Remote fiber optic sensor head assemblies with standard LC or ST connectors
