Yokogawa S9345FA Connector Unit For ESB Bus System

The Yokogawa S9345FA Connector Unit for ESB Bus System is a base/interface module that provides the physical and electrical connection to the ESB (Enhanced System Bus) used by Yokogawa ProSafe-RS safety systems and CENTUM control architectures. As a structural connector rather than an active processing module, it enables data exchange between safety control units, node units, and I/O modules across the ESB. Its modular base design mounts within a node unit or rack and supports a stable ESB communication path; the unit weighs about 1.0–1.3 kg and is compatible with ProSafe-RS, CENTUM VP, FIO, and N-IO architectures. For redundancy, it is commonly configured in dual (2x) setups, and common replacements include the S9346FA (terminator) and S9342FA (bus interface module).