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6SL3544-0FB21-1PA0

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Within a SINAMICS G120D drive, Siemens 6SL3544-0FB21-1PA0 serves as the CU240D-2 DP-F control unit for PROFIBUS DP and PROFIsafe motor control.
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Technical specifications for 6SL3544-0FB21-1PA0

  • Manufacturer:
    Siemens
  • Part Number:
    6SL3544-0FB21-1PA0
  • Product Family:
    Siemens SINAMICS
  • Product Type:
    SINAMICS G120D CU240D-2 DP-F Control Unit
  • Stock:
    1
  • External Electronics Supply:
    24 V DC
  • Fieldbus:
    PROFIBUS DP
  • Safety Communication:
    PROFIsafe
  • Standard Digital Inputs:
    6
  • Fail-Safe Digital Inputs:
    3
  • Standard Digital Outputs:
    2 isolated outputs, 0.5 A each
  • Fail-Safe Digital Output:
    1
  • Analog Inputs:
    2, 0 to 10 V
  • Encoder Input:
    HTL encoder
  • Control Modes:
    Linear V/f, square-law V/f, FCC and sensorless vector control
  • Connector System:
    M12 plug connections
  • Protection Rating:
    IP65 / UL Type 3
  • Operating Temperature:
    0 to 55 °C
  • Storage Temperature:
    -40 to 70 °C
  • Maximum Relative Humidity:
    95% at 40 °C, non-condensing
  • Safety Functions:
    Integrated drive safety through PROFIsafe and local F-signals
  • Weight:
    1.7196 lbs (0.78 kg)
  • Estimated shipping dimensions:
    20.8x27.8x9cm
  • Tariff Code:
    85049090
  • Country of origin:
    Great Britain
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Fieldbus and Safety Local I/O Paths Motor Feedback Commissioning Record

Features:

  • PROFIBUS DP exchanges drive setpoints, status and diagnostics with the controller.
  • PROFIsafe and local fail-safe I/O form the configured safety communication path.
  • Motor data, encoder feedback and the matched power module complete the drive-control loop.
Machine commands enter through the fieldbus or M12-connected local inputs.

The control unit processes those commands and sends gating instructions to the power stage.

Encoder and diagnostic feedback return motor and drive state to the controller.

The Siemens 6SL3544-0FB21-1PA0 G120D CU240D-2 DP-F Control Unit may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6SL3544-0FB21-1PA0 G120D CU240D-2 DP-F Control Unit Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Keeping standard and safety telegrams distinct

  • PROFIBUS DP: Setpoints, control words, status words, and diagnostics use the standard bus channel.
  • PROFIsafe: Safety telegrams carry the configured fail-safe commands and acknowledgements.
  • Addressing: The fieldbus address and telegram selection match the controller project.
  • Acceptance: Safety parameters and every protective function are proved before operation.

Connecting machine signals to the distributed drive

  • Standard inputs: Six digital inputs receive operating commands and sensor states.
  • Analog inputs: Two 0 to 10 V channels accept analog references or measurements.
  • Standard outputs: Two isolated outputs report configured drive conditions.
  • Fail-safe signals: Three F-DI and one F-DO connect the local safety circuit.

Closing the control loop around the motor

  • Motor data: Nameplate values establish current, voltage, speed, and power limits.
  • HTL encoder: Pulse count and direction describe actual motor movement.
  • Control method: V/f, FCC, or sensorless vector operation is selected for the load.
  • Power stage: The control unit commands the matched G120D power module to energize the motor.

Preserving the settings that define the installed drive

  • Project archive: Keep the approved drive configuration and parameter backup.
  • Network data: Record PROFIBUS address, telegram, controller assignment, and diagnostics.
  • I/O map: Document every M12 input, output, analog signal, and encoder connection.
  • Safety proof: Retain the PROFIsafe configuration and signed functional-test results.
Description
Within a distributed SINAMICS G120D drive, Siemens 6SL3544-0FB21-1PA0 serves as the CU240D-2 DP-F control unit. It interprets PROFIBUS commands and local machine signals, executes the selected motor-control method, and sends switching instructions to the matched power module.

The communication path of 6SL3544-0FB21-1PA0 separates ordinary drive data from safety data on the same fieldbus. PROFIBUS DP carries setpoints, status, and diagnostics, while PROFIsafe transfers the configured safety telegrams that work with the unit’s fail-safe inputs and output.

Machine wiring reaches 6SL3544-0FB21-1PA0 through M12 connections. Six standard digital inputs and two analog inputs handle operating commands and references, three fail-safe inputs serve safety devices, two isolated digital outputs report standard states, and the fail-safe output belongs to the safety circuit.

An HTL encoder gives 6SL3544-0FB21-1PA0 the motor feedback needed by the configured control mode. Commissioning therefore links motor nameplate data, encoder pulses and direction, PROFIBUS address, I/O functions, safety parameters, and the approved acceptance test instead of treating the control unit as a stand-alone spare.
Alternative Names
6SL35440FB211PA0 6SL3 544-0FB21-1PA0 6SL3544 0FB21 1PA0 Siemens 6SL3544-0FB21-1PA0 6SL3544-0FB21-1PA0 CU240D-2 DP-F CU240D-2 DP-F 6SL3544-0FB21-1PA0 6SL 3544 0FB21 1PA0 6SL3544/0FB21/1PA0
Technical notes
For Siemens 6SL3544-0FB21-1PA0, retain PROFIBUS address, PROFIsafe parameters, motor data, encoder settings, I/O assignment, safety acceptance record, and drive project.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does Siemens 6SL3544-0FB21-1PA0 show PROFIBUS communication without enabling the motor?
For Siemens 6SL3544-0FB21-1PA0, check control word, enable sequence, active fault, local input assignment, PROFIsafe state, motor data, and power-module readiness.
What must be preserved before replacing 6SL3544-0FB21-1PA0?
Preserve the 6SL3544-0FB21-1PA0 parameter set, motor and encoder data, PROFIBUS address, telegram, I/O mapping, safety configuration, firmware level, and acceptance record.
How are normal and safety inputs separated on Siemens 6SL3544-0FB21-1PA0?
Siemens 6SL3544-0FB21-1PA0 assigns six inputs to standard control and three inputs to fail-safe functions, with the safety logic coordinated through PROFIsafe.
Why can the HTL encoder direction be wrong on 6SL3544-0FB21-1PA0?
Compare the 6SL3544-0FB21-1PA0 encoder wiring, pulse setting, channel assignment, mechanical direction, and motor rotation before changing control parameters.
Can Siemens 6SL3544-0FB21-1PA0 be treated as a complete drive by itself?
No. Siemens 6SL3544-0FB21-1PA0 is the control unit; operation also depends on the matched G120D power module, motor, supply, fieldbus, I/O, encoder, and safety circuit.