Festo Intelligent End Plates: Simplify CPX-AP-A Remote I/O Expansion | Doskee Automation

The Pain of Expansion: Gateways, Addresses, and Power

OEM machine platforms evolve as additional zones, modules, or downstream cells are integrated into the original control design. When remote I/O extends beyond its initial boundary, added gateways, new Ethernet addresses, and separate power distribution increase wiring complexity and commissioning effort.

To simplify scalable machine architecture, Festo has introduced intelligent end plates for the CPX-AP-A remote I/O platform. This solution extends system communication, diagnostics, and power across multiple machine zones, connecting distributed on-machine I/O to cabinet-based PLC control with no cabinet rewiring or added gateways.

EPLI / EPLI-S: Making Expansion Simpler

With the EPLI and EPLI-S intelligent end plates, machine builders can scale remote I/O systems across independent machine sections without redesigning controls or duplicating power and networking connections. I/O and pneumatic valves can be placed at the point of use. The AP architecture maintains high-speed communication, unified diagnostics, and clean grounding across all segments — supporting modern modular and hybrid system architectures, reducing cabinet density, shortening wiring runs, and speeding up machine building and commissioning.

CPX-AP-A: A New Generation of Remote I/O

CPX-AP-A remote I/O modules are based on over two decades of Festo expertise in distributed valve and I/O systems. Modules can be mounted together in a cabinet or placed individually across the machine — all appearing as one system to the PLC. This flexibility lets machine builders locate valves, I/O, smart sensors, and safety functions exactly where needed, without adding fieldbus nodes or device profiles.

The AP architecture consolidates dozens of functions under a single industrial Ethernet address, reducing network complexity, controller overhead, and configuration time. It maintains high-speed communication and unified diagnostics across all machine zones, simplifying commissioning and maintenance while supporting scalable modular designs.

No Added Gateways, No Extra Addresses

The EPLI and EPLI-S intelligent end plates extend the AP backplane, enabling the connection of additional modules without introducing gateways or consuming additional network addresses. EPLI is a convenient and efficient way to extend AP communications and system power to downstream modules, while EPLI-S additionally provides power to connected modules. Together they give engineers full control over system architecture, cable routing, and power zones while maintaining AP timing and diagnostic fidelity across long distances (up to 50 m / 164 ft between modules).

Festo’s design of the intelligent end plates preserves AP performance, bandwidth, and synchronization through each module. The result is cleaner field wiring and tubing runs, flexible power distribution, and cabinet-free expansion — supporting modern machine cells, remote I/O and valve islands, and distributed power zones without duplicating network nodes or adding protocol layers.

Doskee Automation specializes in industrial automation and pneumatic components, offering selection and sourcing support for Festo CPX-AP-A remote I/O modules, intelligent end plates, valve terminals, and related pneumatic products. If you’re planning machine expansion, remote I/O wiring, or cabinet reduction, please contact us for selection guidance and a quote tailored to your architecture.

Reference: Adapted from PneumaticTips “Festo introduces intelligent end plates for remote I/O system expansion” by Mary Gannon (2026-04-29)