Beckhoff EL6731 EtherCAT Terminal

The Beckhoff EL6731 is a powerful PROFIBUS master/slave communication terminal for EtherCAT systems, enabling direct integration of PROFIBUS devices into Beckhoff’s modular I/O environment. Supporting PROFIBUS DP, DP-V1, and DP-V2 protocols, it facilitates communication at up to 12 Mbaud while offering advanced diagnostic tools and configurable error management for robust industrial networking.

Ideal for space-constrained applications, the EL6731 offers an embedded alternative to traditional PROFIBUS PCI™ cards, eliminating the need for internal PC slots and reducing panel footprint.

Technical Specifications

Manufacturer: Beckhoff
Part Number: EL6731 Beckhoff
Product Type: PROFIBUS Communication Terminal
Technology: PROFIBUS Master/Slave Interface
Supported Protocols: PROFIBUS DP, DP-V1 (Class 1 & 2), DP-V2, PROFIBUS MC
Number of Channels: 1
Data Transfer Rate: 9.6 kbaud to 12 Mbaud
Cycle Time: From 200 µs (with per-slave CDL configuration)
Max. Slaves: Up to 125
Max. Data per Slave: 244 bytes input/output/parameter/configuration

Connectivity & Communication

Interface: 1 x 9-pin D-sub socket, galvanically isolated
Distributed Clocks: Supported
Status LEDs: Integrated hardware diagnostics
Process Image Bit Width: Max. 1.4 kB input and 1.4 kB output
GSD File Assignment: Automatic detection and configuration

Electrical & Environmental

Nominal Voltage: Supplied via E-bus
Current Consumption (E-bus): Typ. 200 mA
Operating Temperature: -25°C to +60°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 95%, non-condensing
Vibration/Shock Resistance: EN 60068-2-6 / EN 60068-2-27
EMC Standards: EN 61000-6-2 / EN 61000-6-4
Protection Rating: IP20

Mechanical & Mounting

Dimensions (W x H x D): 24 mm x 100 mm x 52 mm
Material: Polycarbonate
Mounting: 35 mm DIN rail (EN 60715)
Design Form: Compact terminal housing with signal LEDs
Side-by-Side Mounting: Double slot and key connection
Wiring Method: Specific push-in connection

Compliance & Approvals

Certifications: CE, CCC, UL, ATEX, IECEx
ATEX Marking: II 3 G Ex ec IIC T4 Gc
IECEx Marking: Ex ec IIC T4 Gc

Key Features

✅ PROFIBUS Master or Slave: Fully supports DP, DP-V1, DP-V2 protocols.

✅ Space-Saving Design: Replaces PCI PROFIBUS cards in tight installations.

✅ Fast Data Exchange: Supports up to 12 Mbaud and 200 µs cycle times.

✅ Advanced Diagnostics: Built-in LED indicators and parameter/status tools.

✅ Automatic GSD Assignment: Streamlined device configuration.

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