Product Description:

The EK1814 is an EtherCAT I/O coupler manufactured by Beckhoff for the EK EtherCAT Couplers series. The unit combines four digital input channels and four digital output channels with the high-speed EtherCAT fieldbus, allowing a controller to collect signals and actuate devices through a single compact slice. By translating real-time Ethernet frames into 24 V switching logic, the coupler forms the first node of a local terminal block and distributes power and data to subsequent I/O modules.

It communicates along the network at a line rate of 100 MBaud, so telegrams pass through without the bandwidth restrictions typical of slower buses. Upstream and downstream segments connect through 2 × RJ45 connectors, permitting ring or tree layouts with standard CAT-5 cabling. Internal forwarding latency is only 1 µs, which preserves the deterministic timing required by motion axes. The I/O supply is derived from a nominal 24 V DC feed, and the integrated E-bus regulator can source up to 1000 mA for attached terminals. An input current of 3 mA and a 3 ms filter on each input channel minimize sensor loading while suppressing contact bounce over the bus cycle. The installation distance between nodes may reach 100 m without repeaters.

Each of the four output transistors can deliver up to 0.5 A, enabling direct actuation of relays, indicators, or pneumatic valves. The housing measures only 44 × 100 × 68 mm, yet it contains power contacts rated for 10 A to feed subsequent modules. Typical load response is rapid, with switching times of 60 µs when turning on and 300 µs when turning off, ensuring crisp updates in synchronized tasks. Despite the integrated power distribution, the coupler adds just 125 g to a DIN rail, supporting high-density assemblies where weight and width are closely controlled.