Original Siemens CIB comm. Component 6SL3353-6TG41-0AA3 6SL33536TG410AA3 6SL3353-6TG41-OAA3 6SL3 353-6TG41-0AA3

Siemens 6SL3353-6TG41-0AA3 | SINAMICS S120 Replacement Control Interface Board — 500–690V Smart Line Module

Part Number: 6SL3353-6TG41-0AA3

Manufacturer: Siemens AG (Germany)

Product Type: Replacement Control Interface Board (Communication Board)

Product Family: SINAMICS S — Spare Part

Compatible Unit: SINAMICS S120 Smart Line Module, 500–690V 3AC, 50/60 Hz 

Overview

The 6SL3353-6TG41-0AA3 is a Siemens SINAMICS S replacement control interface board — a spare part designed for installation into the SINAMICS S120 Smart Line Module operating on 500–690V three-phase AC power.

This board is the electronic control and communication layer of the Smart Line Module, handling the module's Drive-CLiQ network interface, SINAMICS control logic, and the monitoring and management functions that keep the line side of the S120 drive system operating within specification.

The SINAMICS S120 is Siemens' high-performance modular drive platform for servo-controlled motion, multi-axis synchronisation, and precision speed control.

It is widely deployed in machine tools, printing and packaging machinery, plastics processing equipment, material handling conveyors, and other manufacturing systems that require coordinated multi-axis drive control. 

The chassis format — the large, cabinet-mounted version of the S120 — handles the highest power levels in the range, and the Smart Line Module is the supply-side component that feeds the shared DC bus on which all Motor Modules in the system draw their motor power.

The Smart Line Module occupies a specific and essential role in the S120 drive architecture. Where the Basic Line Module provides a simple unregulated DC bus from the AC supply, the Smart Line Module adds active control of the line current.

It can regenerate energy from decelerating motors back to the AC supply — a function that improves system efficiency significantly in applications where motors decelerate frequently.

The 6SL3353-6TG41-0AA3 is the control board that implements this active line management intelligence.

Key Specifications

SINAMICS S120 Smart Line Module — Control Board Function

In the S120 chassis system, the Smart Line Module connects directly to the three-phase AC supply. Inside the module, the power section converts the AC supply into a regulated DC bus voltage.

The control interface board — the 6SL3353-6TG41-0AA3 — manages this conversion process actively. 

It monitors the AC supply voltage and frequency, regulates the DC link voltage to the required level, controls the PWM switching of the active front-end IGBT devices, and manages the regenerative energy flow back to the supply when motor modules decelerate.

The Drive-CLiQ interface on the control board is the communication backbone of the S120 system. All S120 modules — Motor Modules, Power Modules, the CU320 Control Unit, and the Smart Line Module itself — connect through Drive-CLiQ in a network topology that allows the system's Control Unit to configure, monitor, and control every module in real time.

The 6SL3353-6TG41-0AA3 implements the Smart Line Module's end of this communication network. When the board fails, the module either drops off the Drive-CLiQ network entirely or generates persistent faults that prevent the system from starting.

Regenerative Operation — Smart Line Module Advantage

The active front-end design of the Smart Line Module provides a fundamental operational advantage over passive rectifier line modules.

In a typical drive cycle, motors decelerate frequently — especially in machine tools, where rapid axis reversals are standard, and in packaging machinery, where constant acceleration/deceleration cycles characterise the process.

When a motor decelerates, its kinetic energy must go somewhere. In passive drive systems, this energy is dissipated as heat in braking resistors. The Smart Line Module instead feeds this energy back to the AC supply as controlled three-phase power.

For high-cycle applications, the energy recovery is substantial — the Smart Line Module can reduce the system's net energy consumption significantly compared to a passive rectifier front end.

The 6SL3353-6TG41-0AA3 implements the control algorithms that manage this energy recovery in real time, synchronising the regenerative current to the supply voltage and frequency.

Replacement Procedure

The 6SL3353-6TG41-0AA3 is supplied as a replacement spare part for installation into a Smart Line Module that has experienced a control board fault.

The replacement procedure involves safe isolation of the drive cabinet, discharge of the DC bus capacitors (which retain high-voltage charge after power off), physical extraction of the existing board, installation of the replacement board with all connector reconnection, and firmware verification.

The Smart Line Module's firmware version must be compatible with the S120 Control Unit (CU320-2 or similar) and the SINAMICS Startdrive or STARTER commissioning software version in use. Siemens recommends verifying firmware compatibility using the SINAMICS firmware release notes before installation.

After board replacement, the system should be recommissioned through the Drive-CLiQ auto-configuration process to ensure the module is correctly identified by the Control Unit.

FAQ

Q1: The S120 system generates a fault on the Smart Line Module with error code F06000 or similar (module not recognised on Drive-CLiQ). Is the 6SL3353-6TG41-0AA3 the fault?

A module not recognised on Drive-CLiQ is often a control board issue — the board implements the Drive-CLiQ communication, and if it has failed, the module becomes invisible to the Control Unit.

Before concluding it is the board, check the Drive-CLiQ cable connection between the Smart Line Module and the next device in the chain.

Clean and reseat the connector. If the fault persists with a confirmed-good cable, the 6SL3353-6TG41-0AA3 requires replacement.

Q2: The Smart Line Module is generating an F30001 fault (overcurrent) at startup under no load. The power section IGBTs have been tested and confirmed functional. Is this a control board fault?

An F30001 under no load with confirmed-good IGBTs suggests a current sensing or gate drive fault on the control board.

The control board reads the module's phase current sensors to regulate the active front-end current waveform. 

If a current sensor reading is incorrect due to a board-level fault, the control algorithm interprets the offset as overcurrent and trips.

This is a control board fault pattern. Verify the current sensor connections at the board first — if connections are secure and the fault persists, the board requires replacement.

Q3: After replacing the 6SL3353-6TG41-0AA3, the S120 system starts but the Smart Line Module generates a firmware incompatibility message. What is the correct action?

Firmware incompatibility after board replacement is a normal occurrence when the replacement board has a different firmware version from the original. Use SINAMICS Startdrive or STARTER to update the module's firmware to a version compatible with the Control Unit's firmware level.

The SINAMICS compatibility matrix specifies which firmware versions can operate together.

After updating and saving parameters, perform an auto-configuration in STARTER/Startdrive and verify that all modules reappear correctly in the drive topology.

Q4: The 6SL3353-6TG41-0AA3 board is rated for 500–690V. Can it be used in a 380–480V system as a substitute if the correct board is unavailable?

No. The control boards for 500–690V and 380–480V Smart Line Modules are specific to their voltage range. The gate drive timing, current sensing calibration, and DC link voltage control parameters are configured for the module's rated voltage.

Using a 690V-rated board in a 380–480V module will produce incorrect DC link voltage regulation and may damage the system.

Always match the replacement board to the exact voltage specification of the installed module.

Q5: The original 6SL3353-6TG41-0AA3 has been removed from the module. Can the parameters stored on the control board be backed up before replacement, and how?

The 6SL3353-6TG41-0AA3 does not independently store the drive system's parameters in a user-accessible way.

The system parameters are stored in the Control Unit (CU320-2 or similar) and in the project file in SINAMICS Startdrive or STARTER. 

Before any hardware replacement in the S120 system, the project should be backed up from the PC engineering tool.

After board replacement and recommissioning, the backed-up project file is uploaded to the Control Unit to restore the parameter set.

This ensures no parameter data is lost during the hardware exchange.