Module identity and deployment
The Festo CPX-8DE is an 8-input digital input module belonging to the CPX series of PLC expansion modules. It sits on the CPX system backplane, extending the digital input count for a valve terminal or remote I/O node.
Comparison with CPX-8DE-8DA
The closest sibling in the CPX family is the CPX-8DE-8DA, which combines 8 digital inputs with 8 digital outputs in a single slice. The CPX-8DE is input-only — if the panel layout already has output modules, the CPX-8DE saves one slot versus the combo unit.