The Festo CPX-FB23-24 is a fieldbus node module that sits within the CPX terminal platform, handling communication between the CPX system and a higher-level controller. It's a current-production part, meaning it's still actively manufactured and specified into new designs without obsolescence risk.
As a CPX-family module, this unit snaps onto the CPX backplane alongside I/O slices, pneumatic valve manifolds, and other function blocks. The FB23-24 variant provides a specific fieldbus interface — the exact protocol is determined by the module variant, but the CPX-FB23-24 is the order code for the bus coupler node that bridges the CPX terminal to the control network.