The Keyence PJ-V22 Expansion Unit is a versatile and robust optical sensing device designed to extend the functionality of the PJ-V90 and PJ-V91 controllers. As part of the PJ-V Series, this Extension Unit B provides reliable light curtain functionality with 4 beam axes per module, offering flexible scalability for applications requiring wide detection coverage and dependable object sensing.

One of the key strengths of the PJ-V22 lies in its expandability. A single setup can achieve up to 64 optical axes by combining one PJ-V20 and up to seven PJ-V21/PJ-V22 units, resulting in a maximum detection area of 1,260 mm (49.6″). This scalability makes it an excellent solution for safeguarding wide workspaces, conveyor lines, or automated machinery where full coverage is essential to ensure operator safety and process reliability.

Performance is further enhanced by its long detection range, capable of reliably identifying opaque objects with a diameter as small as 28 mm at distances up to 7 meters. This allows the PJ-V22 to be applied across a wide variety of industrial environments, from production and packaging lines to assembly stations, where objects of varying sizes must be detected quickly and accurately.

The PJ-V22 is engineered with durability in mind. Its IP65-rated enclosure provides strong resistance against dust and water, while its aluminum case and polyarylate lens cover ensure mechanical resilience. The unit is designed to withstand vibrations of 10 to 55 Hz at 0.7 mm amplitude and shocks of 100 m/s² (16 ms pulse) up to 1,000 times in multiple directions, making it ideal for environments where equipment is exposed to constant mechanical stress.

Ease of use is a major consideration in the design of the PJ-V22. Both the transmitter and receiver are fitted with a row of 8 two-color LEDs (red/green), which provide immediate visual feedback for alignment and operational status. This feature reduces setup time, simplifies troubleshooting, and helps operators maintain system performance with minimal downtime.

In addition to its robust construction and user-friendly indicators, the PJ-V22 incorporates an infrared LED light source (880 nm) with a stable and consistent output. Its effective aperture angle of ±2.5° ensures reliable operation even when optical alignment is slightly offset, providing installation flexibility in challenging layouts.

In summary, the Keyence PJ-V22 Expansion Unit combines scalability, durability, and ease of operation in a compact yet powerful module. Designed to work seamlessly with the PJ-V90/91 controllers, it delivers reliable detection across wide areas while withstanding demanding industrial conditions. Its balance of precision detection, rugged build, and intuitive monitoring makes it an excellent choice for machine guarding, automation safety, and large-area object detection systems.