6SL3055-0AA00-2EB0 SINAMICS S120 CBE20 PROFINET Board 4-Port RJ45

The 6SL3055-0AA00-2EB0 is a CBE20 PROFINET Communication Board designed to add PROFINET IO connectivity to a compatible CU320-2 Control Unit.

It provides four RJ45 Ethernet ports with integrated switch functionality, allowing the connected drive controller to communicate with a PROFINET-based automation network.

The CBE20 is installed in the option slot of the CU320-2. It does not independently control motors, execute a machine program or provide motor power.

Its main role is to extend the network capability of the drive controller so that operating commands, setpoints, actual values, alarms and diagnostic information can be exchanged with the automation system.

This model is especially relevant when an existing CU320-2 drive system requires a dedicated PROFINET interface or when replacing a failed CBE20 board while retaining the original controller and machine project.

Key Features

• CBE20 PROFINET Communication Board
• Four RJ45 Ethernet ports
• Integrated network switch
• Designed for CU320-2 Control Units
• Adds PROFINET IO connectivity
• Supports distributed drive communication
• Installed in the controller option slot
• Suitable for replacement and network upgrades
• Active product

Typical Applications

• Multi-axis CNC systems
• Packaging machinery
• Printing and converting lines
• Material handling systems
• PROFINET-based production equipment

PROFINET Communication Function

The 6SL3055-0AA00-2EB0 provides the network interface between a CU320-2 drive controller and a PROFINET IO automation system.

Typical communication data includes:

• Drive control words
• Speed setpoints
• Torque setpoints
• Actual speed values
• Drive status
• Warning messages
• Fault information
• Diagnostic data

The exact telegrams and process data depend on the PLC project and drive configuration.

Four-Port RJ45 Interface

The CBE20 includes four RJ45 Ethernet ports with integrated switch functionality.

This allows the module to support:

• Line network structures
• Connection of downstream devices
• Cabinet-level Ethernet distribution
• Reduced need for a separate local switch
• Flexible machine network layouts

The four ports belong to the same PROFINET communication interface and do not represent four independent controller networks.

Integrated Switch Function

The integrated switch forwards Ethernet traffic between the available RJ45 ports.

This is useful when several drive or automation devices are arranged in a line topology.

Typical connection example:

PROFINET Controller

CBE20 Port 1

CBE20 Internal Switch

Additional Network Devices

CU320-2 Drive System

The CBE20 should not be marketed as a general-purpose unmanaged Ethernet switch because it is a dedicated drive communication board.

CU320-2 Integration

The CBE20 is intended for installation in a compatible CU320-2 Control Unit.

The CU320-2 performs:

• Motor-control calculations
• Multi-axis coordination
• Drive-object management
• Parameter processing
• Safety-function processing
• DRIVE-CLiQ system management

The CBE20 provides the external PROFINET connection for that controller.

CBE20 vs CU320-2 PN

CBE20 with CU320-2

Adds PROFINET communication through a separate option board.

CU320-2 PN

Includes a native PROFINET interface as part of the Control Unit configuration.

These solutions should not be considered identical. Selection depends on:

• Existing controller hardware
• Available option slot
• Original machine project
• Firmware version
• Network architecture
• Replacement strategy

CBE20 vs CU320-2 DP

CU320-2 DP

Uses PROFIBUS DP as its primary integrated fieldbus.

CBE20

Adds a PROFINET IO communication interface to a compatible CU320-2 configuration.

A CBE20 board does not convert every PROFIBUS project automatically into a PROFINET project. PLC hardware configuration and drive communication settings may need to be changed.

CBE20 vs DRIVE-CLiQ

PROFINET

Connects the drive controller to the machine PLC or automation network.

DRIVE-CLiQ

Connects internal drive components such as Line Modules, Motor Modules, motors and encoder modules.

The CBE20 handles PROFINET communication and is not a DRIVE-CLiQ hub.

Network Configuration

Before commissioning, verify:

• PROFINET device name
• IP configuration
• PLC hardware project
• Telegram selection
• Process-data length
• Controller firmware
• CBE20 firmware compatibility
• Network topology
• Cable category
• Port assignment

Incorrect device naming or hardware configuration can prevent the PLC from establishing communication with the drive.

Replacement Identification

Correct Model Number

6SL3055-0AA00-2EB0

Correct Product Type

CBE20 PROFINET Communication Board

Network Connection

Four RJ45 Ports

Compatible Controller

CU320-2

Installation Location

Control Unit Option Slot

Before replacement, confirm:

• Complete order number
• 2EB0 suffix
• Existing Control Unit model
• Controller firmware
• PROFINET project
• Device name
• IP settings
• Option-slot compatibility
• Existing port connections

Do not replace the board only according to the CBE20 name or physical appearance.

Installation Guidelines

Disconnect the Control Unit power supply.

Wait for the complete drive system to become safe.

Use suitable electrostatic-discharge protection.

Record all existing Ethernet connections.

Back up the PLC and drive projects.

Confirm the exact CBE20 order number.

Inspect the Control Unit option slot.

Insert the board securely.

Reconnect the RJ45 cables correctly.

Restore the approved network configuration.

Assign the correct PROFINET device name.

Check communication status.

Verify all connected drive axes.

Test machine safety functions before production use.

Installation should be completed by qualified drive-system personnel.

FAQ

Q1: What is 6SL3055-0AA00-2EB0?

A1: It is a CBE20 PROFINET Communication Board for a compatible SINAMICS S120 CU320-2 Control Unit.

Q2: How many Ethernet ports does it have?

A2: It has four RJ45 Ethernet ports.

Q3: Does it include switch functionality?

A3: Yes. The four ports include integrated switch functionality.

Q4: Is the CBE20 a complete Control Unit?

A4: No. It is a communication expansion board installed in a compatible CU320-2.

Q5: Does it directly control a motor?

A5: No. Motor control is performed by the connected CU320-2 and Motor Modules.

Q6: What communication protocol does it support?

A6: It is designed for PROFINET IO communication.

Q7: Is it a DRIVE-CLiQ hub?

A7: No. It connects the drive controller to PROFINET, while DRIVE-CLiQ connects internal drive components.

Q8: Can it replace a CU320-2 PN?

A8: Not directly. A separate CBE20 configuration and an integrated PN Control Unit have different hardware and project requirements.

Q9: Can it convert an existing PROFIBUS project automatically?

A9: No. The PLC project, device configuration and drive telegrams may require modification.

Q10: Is this model still active?

A10: Yes. It is currently listed as an active product.