Safeguard large systems while remaining cost effective. That’ s the key promise of the QS Safety PLC. In the past, production lines were protected by “ islands� of safety control; typically dedicated safety relay panels. While safe, this approach suffered from many of the same disadvantages that lead to replacement of conventional relay panels many years ago. A safety relay panel is expensive to build, difficult to change and slow to troubleshoot. The QS offers a modern approach to safety by combining a CC-Link Safety distributed I/ O network with the flexibility of a modular controller. This offers the capacity to cover an entire production line, while bringing the benefits of reduced wiring, rapid diagnostics and easy program modification and maintenance. Of course, since this is a safety controller however, there is a full complement of safeguards against system failure and unauthorized access. A SIL 3, Category 4 certification completes the picture.