BECKHOFF EP9128-0021 EtherCAT Box Junction

SKU EP9128-0021

In stock

12-month warranty
Free returns within 30 days

Manufacturer: BECKHOFF
Product No.: EP9128-0021
Origin Germany
Product Type: EtherCAT Junction Boxes
Payment: T/T, Western Union
Weight: 0.3 kg
Dimensions: 60 mm x 126 mm x 26.5 mm
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

The BECKHOFF EP9128-0021 is an 8-port EtherCAT junction module designed for branching EtherCAT topologies in demanding industrial environments. This EtherCAT Box enables the configuration of flexible line, star, or tree topologies directly in the field, reducing cabling overhead and eliminating the need for protective control cabinets. It distributes the EtherCAT signal to up to eight separate junctions using standard shielded M8 connections.

Housed in a compact, polyamide enclosure, the BECKHOFF EP9128-0021 offers excellent environmental resistance with an IP65/66/67 rating. Its decentralized design supports high-speed industrial data transfer up to 100 Mbit/s with a minimal propagation delay of approximately 1 microsecond per port. This makes it suitable for complex machine configurations where fieldbus nodes are widely distributed.

Features

8-port EtherCAT junction for flexible star, tree, or line topology distribution.
Shielded M8 connection technology providing reliable signal transmission under mechanical stress.
High-speed data transfer rates of 100 Mbit/s conforming to Fast Ethernet standards.
Low propagation delay of approximately 1 microsecond per port.
High protection class (IP65, IP66, and IP67) for direct machine mounting without control cabinets.
Compact, space-saving PA6 polyamide housing with pre-drilled mounting holes.

Applications

Decentralized fieldbus topology design for modular production machinery.
Star-branching of EtherCAT networks in packaging, assembly, and material handling systems.
Field-level sensor/actuator integration in high-vibration or washdown environments.
Distributed network routing over long distances of up to 100 meters between communication stations.

Technical Specifications

Parameter	Specification
System and Communication
Protocol	EtherCAT
Task within System	Coupling of EtherCAT junctions
Data Transfer Rate	100 Mbit/s
Delay Time	Approx. 1 microsecond per port
Data Transfer Medium	Ethernet/EtherCAT cable (minimum Category 5), shielded
Distance Between Stations	Maximum 100 meters (100BASE-TX)
Electrical Requirements
Nominal Power Supply	24 V DC (-15% / +20%)
Current Consumption (24 V DC)	Approx. 150 mA
Physical and Connection Details
Bus Interface	8 x M8 sockets, shielded, screw type
Connection Method	M8, screw type, 4-pin
Dimensions (W x H x D)	60 mm x 126 mm x 26.5 mm
Enclosure Material	PA6 (polyamide)
Weight	Approx. 300 g
Environmental and Compliance
Operating Temperature Range	-25 to +60 Celsius
Storage Temperature Range	-40 to +85 Celsius
Protection Rating	IP65, IP66, IP67 (conforms to EN 60529)
Vibration / Shock Resistance	Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity / Emission	Conforms to EN 61000-6-2 / EN 61000-6-4
Approvals and Markings	CE, UL

Connections / Interfaces

Interface Type	Function
8 x M8 Sockets (Screw-type, 4-pin)	Shielded EtherCAT junction ports for incoming and outgoing communication paths
Power Supply Connections	Fieldside feed-in for logic and sensor power supply

Installation Guidelines

Verify that the system power supply is completely de-energized before mounting or wiring the device.
Securely mount the module directly to the machine frame or mounting plate using the integrated fixing holes (2 x 3.5 mm holes for M3 screws or 2 x 4.5 mm holes for M4 screws).
Use only shielded, Category 5 (or higher) Ethernet/EtherCAT cabling suitable for industrial M8 screw connectors to prevent electromagnetic interference.
Ensure that all M8 connectors are tightened to their rated torque to maintain the IP65/66/67 environmental protection standard.
Connect the supply voltage to the designated power pins, verifying correct polarity (24 V DC) before energizing the system.
Verify communication status using the integrated diagnostic LED indicators during initial system startup.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What is the primary function of the BECKHOFF EP9128-0021?

The BECKHOFF EP9128-0021 is an 8-port EtherCAT junction box designed to branch a standard line topology into a star or tree topology directly in the field, eliminating the need for a control cabinet.

What connector type does the BECKHOFF EP9128-0021 use for its bus interfaces?

The BECKHOFF EP9128-0021 uses eight shielded, 4-pin M8 screw-type sockets for its EtherCAT junction connections to ensure secure data transmission under mechanical strain.

Does the BECKHOFF EP9128-0021 require configuration in TwinCAT?

No, the BECKHOFF EP9128-0021 operates as a transparent junction unit within the EtherCAT network and does not require complex software configuration to distribute the signals.

What are the environmental ratings of the BECKHOFF EP9128-0021?

The BECKHOFF EP9128-0021 is rated IP65, IP66, and IP67, making it highly resistant to dust, water jets, and temporary immersion, suitable for mounting directly onto machines in harsh industrial environments.

What is the signal transmission delay through the BECKHOFF EP9128-0021?

The BECKHOFF EP9128-0021 introduces a very low propagation delay of approximately 1 microsecond per port, preserving high-speed synchronization across the EtherCAT network.

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