The K-Safe 2 systems are designed to comply with IEC 61508 for use in SIL 2 applications. The K-Safe 2 systems are defined as "1002d shared IO". The system contains redundant power supplies, computers, communication links and single input/output
units. Field termination has single components. In addition to supporting the remote IO units (RIO 400), the system can interface to the KS Stahl I.S. RIO that can be located in hazardous areas.