The IQAN-MC43FS controller is certified for functional safety, and is a large I/O count module in the MC4 family. It is for applications with higher demands on functional safety, requiring IEC 61508 SIL2 or EN ISO 13849-1 PLd. The IQAN-MC43FS is best for bigger applications such as total vehicle control (all hydraulic functions) when it is desired to have the controller centrally located to save valuable space.