With C-DIAS Safety, the SIGMATEK control system is expanded with safety functions through a decentralized configuration and component modularity, existing systems can be easily expanded with Safety functions. The basis of SIGMATEK Safety components are hardware solutions that regularly monitor themselves to detect possible errors and put the machine in a safe status if necessary. The entire system meets the IEC 61508 / SIL3 / Ple standard.
The Safety components are fully integrated into the control system. With the modular construction, Safe and non-Safe components can be combined as desired. The individual requirements for various machine types can therefore be met. The wiring is drastically reduced in comparison with classic safety systems.
Also for communication, no additional wiring is needed. For both Safe and non-Safe signals, only one bus system is used: The Ethernet-based, hard real-time VARAN bus. For communication between the Safety components, the "Black-Channel" principle is used in which the bus does not assume any safety-relevant tasks but serves as a data exchange medium only. 
Components 
