The Allen Bradley 22DJ3-4000 is a photoelectric sensor equipped with an on/off function module designed for Type 22DJ3 and Model 4000 devices. This Series B module serves as a Series 4000 LED plug-in control function unit, providing precise photoelectric sensing and reliable switching performance in industrial automation systems. Engineered for stable operation and ease of integration, the 22DJ3-4000 ensures consistent detection accuracy and responsive control in light-based sensing applications. In North America, Europe, Asia, and worldwide installations, this photoelectric sensor may possibly be implemented in automation setups requiring dependable on/off photoelectric functionality and modular LED-based control.