Cascading functionality on the S4B simplifies installation by reducing the wiring needed to connect light curtains to a controller. The auto cascade feature in the S4B goes a step further to facilitate setup and installation, automatically recognizing the next light curtain as they are connected. The minimal response time impact when cascaded allows the S4B to be installed closer to the equipment being guarded, making more efficient use of valuable floor space. Each curtain has the flexibility to be used as a standalone pair, part of a cascade, or in mixed-resolution configurations for various applications. That determination is made by the cordset selected. This means fewer parts to stock, easier ordering, and faster installation. That same flexibility extends across the entire cascade: sensor pairs can be configured with any length, any number of beams, or different resolutions (14 mm or 30 mm), as long as each emitter is paired with its matching receiver.

Integrated visual indication and IO-Link diagnostics help operators and maintenance teams identify S4B status, alignment issues, and recent faults faster. An illuminated endcap provides clear local status indication, while zone indication and weak beam strength indicators support faster commissioning and help identify maintenance needs before they become larger issues. On devices with Feature ID 4 (FID 4), both the first and last beams can maintain synchronization, ensuring consistent response times regardless of which beam has been blocked. When IO-Link is used, the S4B can log the last 10 faults, provide blocked-beam and measurement data, and allow custom indication states for advanced applications. This gives teams more information to troubleshoot intermittent faults, track the causes of nuisance trips, and support applications such as product height verification, open box detection, pallet wrapping, and material feed location.

Reduced resolution allows the S4B to ignore one blocked beam anywhere along the light curtain while still triggering a safety response if two or more beams are blocked. Enabled with two DIP switches, this function is useful in applications such as horizontal guarding or material feed, where small objects, falling scraps, machine components, or passing material may temporarily interrupt the sensing field. This helps plant managers reduce unnecessary downtime, maintain throughput, and keep safety systems working as intended.