Yokogawa S2EN402-S0001 N-ESB Bus Coupler ModuleDescription The Yokogawa S2EN402 S0001 is an N ESB Bus Coupler Module designed for the CENTUM VP distributed control system. It connects the Field Control Unit (FCU) to N IO nodes, enabling fast and reliable communication across the N ESB bus for scalable and high availability control architectures. Specifications Model Number: S2EN402 S0001 Product Type: N ESB Bus Coupler Module Interface: N ESB bus connection between FCU and N IO nodes Communication