The Siemens Industry Automation Division presents a new solution for residual current monitoring in the range from 30 milliamperes (mA) to 40 amperes (A). The two Sirius 3UG4625 and Sirius 3UG4825 relays for IO-Link have two separate outputs that can be assigned different limit values for a two-phase alarm system involving a warning and subsequent shutdown. The residual currents are measured using the Sirius 3UL23 differential current transformer.