EPP2316-0008 BECKHOFF EtherCAT P Box 16-Channel High-Density I/O

Product Overview

The EPP2316-0008 (EPP23160008) is a high-performance EtherCAT P Box designed for decentralized automation environments where space-saving and cabling efficiency are paramount. This robust I/O module integrates 8 digital inputs and 8 digital outputs into a single, compact IP67-rated housing. Utilizing EtherCAT P technology, the EPP2316-0008 combines ultra-fast communication and power supply (both $U_S$ for system/sensors and $U_P$ for peripheral/loads) into a single M8 P-coded cable. By utilizing a 25-pin D-sub interface for I/O connectivity, this module is the ideal solution for B2B applications requiring a high density of channels in a ruggedized, cabinet-free installation, such as robotic end-effectors, modular machine tools, and material handling systems.

Hardware Architecture and One-Cable Automation

The EPP2316-0008 leverages the "One Cable Automation" philosophy. The M8 P-coded connectors prevent accidental connection to standard EtherCAT devices, ensuring that power and data are delivered safely through the same line. The I/O side features a specialized 25-pin D-sub socket (UNC4-40), which allows for the rapid connection of prefabricated cable harnesses. This architecture significantly reduces the mechanical footprint compared to modules using individual M8 or M12 connectors for every channel.

The inputs adhere to EN 61131-2 Type 1/3 specifications with a fast 10 microsecond filter, while the outputs provide up to 0.5 A each. Both inputs and outputs are individually short-circuit proof, ensuring that a fault on a single field device does not compromise the entire module’s operation.

Technical Specifications

Technical FAQs

What is the benefit of the P-coded M8 connector?

The P-coding is a physical safety feature of EtherCAT P. It prevents the module from being plugged into standard EtherCAT (A-coded) ports, protecting the hardware from potential voltage mismatches since EtherCAT P carries both system and peripheral power on the data pairs.

How do I manage the 25-pin D-sub wiring for IP67 compliance?

To maintain the IP67 rating, you must use a compatible D-sub connector hood that features an integrated seal. Beckhoff offers specialized pre-assembled cables and hoods specifically designed to maintain the environmental integrity of the EPP2316-0008 in wash-down or dusty conditions.

Can this module power high-current sensors?

The sensor supply is derived from the control voltage ($U_S$) and can provide up to 0.5 A in total. This supply is short-circuit proof, providing a stable power source for all 8 connected inputs.

Engineering & Installation Guide

• EtherCAT P Topology: When daisy-chaining multiple EPP modules, always calculate the total current consumption from $U_S$ and $U_P$. For long chains, use an EtherCAT P feed-in box (like the EPP1328) to prevent voltage drops that could lead to intermittent communication or output failure.

• D-sub Connector Torque: When securing the 25-pin D-sub cable, ensure the UNC4-40 screws are tightened to the manufacturer's recommended torque. Over-tightening can damage the internal threads, while under-tightening will compromise the IP67 seal and electrical continuity under vibration.

• Grounding Strategy: The shielded M8 connectors provide a functional earth. Ensure the mounting surface or the DIN-rail adapter is connected to a central ground point to dissipate EMC interference, especially in environments with high-frequency noise from VFDs or servo motors.

Engineering Advantages

The EPP2316-0008 is a masterclass in industrial density. By consolidating 16 channels into an IP67 housing with D-sub connectivity, it solves the "cable spaghetti" problem often found in complex machinery. Its resilience to extreme temperatures (-25 to +60 Celsius) and high vibration (EN 60068-2-6) makes it a "mount-anywhere" solution. The dual-purpose inputs (Type 1/3) allow for compatibility with a wide range of industrial sensors, while the fast switching times ensure the module can keep pace with the high-speed cycle times of the EtherCAT protocol, maximizing overall equipment effectiveness (OEE).