Product Description:

The EPP1816-0008 is a compact EtherCAT P digital input module manufactured by Beckhoff in the EPP EtherCAT P Box Modules series. Designed for decentralized architectures, the device links sensors to an EtherCAT controller through a daisy-chainable fieldbus and shared power rail, simplifying wiring in conveyors, packaging machines, and handling cells. It functions as a passive collection point that forwards discrete status signals to the network without adding computational load to the host PLC. The combined communication and power connection reduces the number of separate cables required between distributed devices.

The I/O channels operate from a 24 VDC control rail that also powers the onboard logic within a 3 A control-sum limit. All 16 digital inputs comply with Type 3 of EN 61131-2 and draw 6 mA each, keeping connected sensor loads low. Incoming signals pass through a 10 µs input filter that suppresses contact bounce before they enter the EtherCAT P cycle. Two 4-pin, P-coded M8 sockets carry EtherCAT data and peripheral power, while a 25-pin D-sub socket handles field wiring. The housing carries IP65, IP66, and IP67 ratings, allowing installation directly on machinery without an additional enclosure. Distributed-clock hardware synchronizes input sampling with the network cycle for deterministic signal acquisition.

The compact dimensions of 30 × 126 × 26.5 mm allow the module to fit in narrow cable trays and other confined mounting locations. Its housing has a mass of 165 g, which adds minimal load when the device is installed on movable end effectors. The internal electronics draw only 100 mA, leaving the separate peripheral line available to power connected field devices. A sensor supply current of up to 0.5 A total is available through the D-sub interface for proximity switches, optical sensors, and similar equipment. The module maintains a common input-side voltage reference for the connected channels. Its sealed housing helps protect the electronics from dust, water jets, and temporary immersion in demanding industrial locations.