EP2816-0008 | BECKHOFF | 16-Channel Digital Output EtherCAT Box (D-sub)

Product Overview

The EP2816-0008 (EP2816-0008) is a high-density industrial I/O module from the EtherCAT Box series, designed for direct mounting on machines without the need for a control cabinet. Featuring 16 digital outputs in a robust, compact housing, this module is specifically engineered to interface with multi-pin connector valve terminals and complex sensor-actuator blocks. By utilizing a 25-pin D-sub connection for output signals, it simplifies wiring for pneumatic manifolds and robotic end-effectors. With its IP67 protection rating, the EP2816-0008 thrives in harsh environments, resisting water, dust, and vibration while maintaining high-speed deterministic communication via the EtherCAT protocol.

Technical Configuration

The hardware architecture of the EP2816-0008 is optimized for high-performance distributed I/O. It provides 16 discrete 24 VDC outputs, each capable of delivering 0.5 A. The module features individual short-circuit protection for every channel to ensure that a single field fault does not compromise the entire block. A key technical advantage is the support for Distributed Clocks (DC), allowing the outputs to be switched with microsecond precision synchronized across the entire EtherCAT network. The power supply and EtherCAT bus connections are handled via industrial M8 screw-type connectors, supporting a daisy-chain topology for both data and auxiliary power.

Technical Specifications

Technical FAQs

Why does this model use a D-sub connector instead of standard M12 sockets?

The EP2816-0008 is designed for "multi-pin" applications. Using a single 25-pin D-sub cable to carry 16 output signals significantly reduces installation time and cable clutter when connecting to pneumatic valve islands or specialized manifold blocks that already use D-sub interfaces.

Can I daisy-chain power to multiple EtherCAT Boxes?

Yes. The module includes an M8 male input for power and an M8 female output for downstream connection. This allows you to "loop through" the 24 VDC supply to multiple boxes, provided the total current draw (including the 4 A output limit of this box) does not exceed the rating of your M8 power cables.

What happens if a channel is short-circuited?

Each channel is individually short-circuit proof. If a short occurs on one valve or actuator, only that specific channel will shut down. The internal diagnostics will report the fault to the EtherCAT master (e.g., TwinCAT), while the other 15 channels continue to operate normally.

Engineering & Installation Guide

• Pneumatic Valve Integration: This module is the ideal partner for valve terminals from manufacturers like Festo, SMC, or Norgren that utilize D-sub 25-pin connectors. Ensure the pinout of your valve manifold matches the standard Beckhoff D-sub mapping to avoid cross-wiring actuators.

• Current Load Management: While each channel can handle 0.5 A, the total sum of all outputs ($\sum$) must not exceed 4 A. If you are driving 16 inductive loads simultaneously, calculate the continuous current draw to ensure the 4 A total limit is not breached, which would trigger a thermal shutdown of the module.

• Environmental Sealing: To maintain the IP67 rating, all unused M8 connectors must be sealed with protective caps. Ensure the D-sub 25-pin cable is a high-quality industrial grade with an integrated gasket and that the UNC4-40 screws are properly tightened to prevent moisture ingress.

• Mounting and Vibration: The EtherCAT Box can be mounted in any orientation. Use the integrated mounting holes to secure it directly to the machine frame. Its high vibration and shock resistance (EN 60068-2-6/27) make it suitable for mounting on moving parts, such as robotic arms or gantry systems.