Image courtesy of Hardy Process Solutions Hardy Process Solutions offers a new PROFINET Option card for the HI 4050+ weight controller. Hardy Process Solutions offers a new PROFINET Option card for the HI 4050+ weight controller. PROFINET is a Fieldbus protocol compatible with Siemens PLCs that is widely used in Europe, Asia, and Latin America, and is increasing in popularity in the US. The Hardy implementation supports two-port PROFINET with MRP (Media Redundancy Protocol), which enables the HI 4050+ to join into a ring topology network (Conformance Class B or CC-B). The card installs in the communications options slot and automatically scans for PROFINET networks.