Overview
The Allen-Bradley 42GRU-9201-QD Series A is part of the Rockwell Automation PhotoSwitch Series 9000 general-purpose photoelectric sensor family. It is a polarized retroreflective sensor with a visible red LED light source, selectable Light-Operate/Dark-Operate, SPDT relay output, adjustable sensitivity, 4.9 m sensing range, and an integral 5-pin mini QD connector. This unit is supplied in tested used condition and is intended as a drop-in replacement for existing Series 9000 installations.
Key Features
- Polarized retroreflective sensing mode for reliable detection of shiny targets
- SPDT EM relay output with Standard ON/OFF operation
- Selectable Light-Operate or Dark-Operate switching
- Adjustable sensitivity for fine-tuning to the application
- Integral 5-pin mini quick-disconnect for fast wiring
- Wide AC/DC supply range for flexible panel integration
Technical Specifications
The following specifications for the Allen-Bradley 42GRU-9201-QD are taken from Rockwell Automation’s Series 9000 technical data.
Electrical & Optical
- Operating Voltage: 10–55V DC / 20–40V AC
- Light Source: Visible red, 660 nm
- Sensing Distance: 4.9 m (16 ft)
- Output: SPDT relay, mini quick-disconnect
Typical Applications
The 42GRU-9201-QD is suited to general-purpose object detection on conveyors, packaging lines, palletizers, and material-handling equipment where a polarized retroreflective beam and a dry-contact relay output are required to interface with PLC inputs, motor starters, or control relays.
Compatibility & Replacements
This sensor is a member of the Rockwell Automation PhotoSwitch Series 9000 line. Related catalog numbers in the same family include 42GRU-9001-QD (9.1 m range, SPDT EM relay) and the timing variant 42GTU-9201-QD; the -QD suffix designates a 5-pin mini QD for SPDT EM relay models. Always confirm voltage, output type, sensing distance, and connector style against the existing installation before swapping.
