The PROTECT PSC represents a brand-new generation of a Safety PLC. It is designed in line with the needs of modern production systems and complex individual machines. The PROTECT PSC is developed on a modular system concept to enable the user combining of input and output modules as per the specific application needs. This ensures that none of the inputs or outputs remain vacant unlike the the case of other Safety PLCs. This provides an economical solution by enabling each user to compose his optimal PROTECT PSC system. The system also enables further integration of input and output modules in the existing system at any time using sparse effort as it requires only slight changing of the software.