Ground is presumed to be a “safe haven” for sensitive components. All grounded surfaces and connections are supposed to be “equipotential” i.e. with no voltage difference between them. This assumption may work only for DC. At high frequencies a wire is an inductor presenting impedance, and isolated wires and metal parts are plates of capacitors …
With its new firmware, the SecurityBridge firewall now offers comprehensive protection for industrial automation networks. Not only does it protect the configurable safe small controllers PNOZmulti and the automation system PSS 4000, it also now enables control over data communication between any other subscribers outside of the Pilz range. The SecurityBridge was developed in line with the …