OptiSISsolution is a pre-engineered SIS that eases deployment and reduces lead times for process applications of 50 or 100 I/O points. OptiSISsolution accommodates digital and analog I/O and has simplex I/O and fault-tolerant (dual) I/O versions. It also meets requirements up to SIL 3, is compliant with IEC 61511/ISA 84.00.01 and uses ready-to-install, TÜV-certified hardware and validated software.