A PROFIBUS fail-safe control unit with integrated drive safety functions for modular SINAMICS G120D installations.
Siemens 6SL3544-0FB21-1PA0 is the SINAMICS G120D CU240D-2 DP-F Control Unit for decentralized variable-speed drive systems. It uses PROFIBUS DP communication and combines standard drive control with fail-safe inputs, outputs and integrated safety functions.
The Control Unit operates as part of a modular G120D converter together with a separately selected Power Module. Its IP65 construction supports installation close to the motor in conveyor, material-handling and distributed machine applications.
| Manufacturer | Siemens |
| Product series | SINAMICS G120D |
| Product designation | CU240D-2 DP-F Control Unit |
| Lifecycle | Current official PLM wording not confirmed |
| Country of origin | Germany |
| Parameter | Official specification |
| Article number | 6SL3544-0FB21-1PA0 |
| Control Unit | CU240D-2 DP-F for SINAMICS G120D |
| Communication | PROFIBUS DP |
| Digital inputs | 6, including up to 3 fail-safe inputs |
| Digital outputs | 2, including up to 1 fail-safe output |
| Analog inputs | 2 |
| Safety Integrated functions | STO, SLS, SS1, SSM and SDI |
| Local interfaces | USB, SD/MMC card interface and HTL encoder interface |
| Control supply | External 24 V DC supply required |
| Degree of protection | IP65 |
| Ambient temperature | 0 to +55 °C without Power Module |
| Converter structure | Control Unit used with a separately selected SINAMICS G120D Power Module |
Place motor control close to conveyor sections while retaining PROFIBUS coordination and drive diagnostics.
Support decentralized motors in logistics, transfer systems and modular handling equipment.
Integrate verified drive-safety functions where the machine risk assessment and safety project require them.
A current Siemens PLM lifecycle phrase for the complete order number was not confirmed in the official documents retrieved for this edit.
The page therefore makes no Active, Classic, Discontinued or Obsolete claim. Availability must be verified using the exact MLFB.
It is a Siemens SINAMICS G120D CU240D-2 DP-F fail-safe Control Unit with PROFIBUS DP communication.
Siemens lists STO, SLS, SS1, SSM and SDI for the CU240D-2 DP-F variant.
No. The Control Unit works with a separately selected SINAMICS G120D Power Module.
The 1PA0 order-code variant uses PROFIBUS DP.
Confirm the exact MLFB, Power Module, fieldbus, safety project, I/O assignment, encoder and parameter backup.
Send the full order number, Power Module, motor data, safety requirements, quantity and destination for availability and configuration review.
Structured identification, compatibility review, sourcing coordination, inspection planning and international delivery support for decentralized drive maintenance.
We compare the complete Siemens MLFB, CU240D-2 DP-F designation, PROFIBUS network, fail-safe I/O arrangement, Power Module, motor and encoder information supplied with the inquiry. This helps distinguish the requested Control Unit from standard, PROFINET and other G120D variants.
Where available, nameplate photographs, cabinet records, parameter backups and safety documentation are reviewed together rather than relying on the model description alone.
The requested condition, label evidence, connector areas, enclosure condition and included accessories can be aligned before shipment. For drive electronics, visible damage, contamination, bent contacts and storage history are especially relevant to the inspection scope.
The order discussion can include packaging expectations, documentation, warranty terms and any evidence required by the maintenance team before release.
Exact-code comparison reduces the risk of mixing DP-F, PN-F and standard variants or overlooking the required Power Module and safety configuration.
Commercial and technical questions are organized around the installed drive, helping procurement, engineering and maintenance teams work from the same evidence.
Quantity, destination, transport preference and documentation needs are discussed early so packing and shipment planning match the project schedule.
| Stage | How it supports the order |
| 1. Inquiry | Send 6SL3544-0FB21-1PA0, quantity, destination and available drive or nameplate details. |
| 2. Technical review | We compare PROFIBUS, safety functions, Power Module, I/O, encoder and replacement requirements. |
| 3. Commercial confirmation | Availability, lead time, condition, inspection scope, warranty and delivery plan are clarified before processing. |
| 4. Dispatch support | Protective packing and shipment documentation are coordinated for the selected destination and transport method. |
Share the exact quantity, installed Power Module, motor, PROFIBUS and safety-project details for an availability and compatibility review.
A 70-model cross-brand reference list for automation, drives, networking, instrumentation and maintenance procurement. Confirm every complete order code before purchase.
| 70 Model References | |||
| 6GK5208-0BA00-2FC2 | 330104-02-09-10-01-00 | PRO3000 | EM100 - 823-865 |
| 0243002430 4.300-2420 | E175096 | REG-K 12X230/16 | 140471-01 3500/70 |
| AB444230035 | 15B10851G1 | KJ2003X1-BA2 /12P2093X102 | R6010 |
| SD55X | BM11D | DSX-PLA004 | ABB M2301 2TMA070080W0012 |
| GT437-491 | CK721-A | PR 4501 | BMP21 |
| EB0518(A) FXYMP-M 1677287 | 5642-50 | PSM700 | 24138990 |
| 60950-50 | ACHILLES-NGFW-300-2-R3B | LM4-LC24J-2A2UN | WV-S1112 |
| F9342DT-01 | 2182-227 | 233.52.100 | 15B10840G1 / 15H50541 |
| Nrk16/A | IEM-3000-8TM | ABB DC505-FBP 1SAP220000R0001 | 1SVR450055R0000 |
| 14YB3-230/C 29317AA8 | D504 | ATM-20 | GVAG-2VK1S |
| sms1600 pn sg001043 | 407860 | OC485 | B4-24-T-5-30 |
| PRO32IN 10290-0000-F REV-C | ABB PM582 / 1SAP140200R0100 | EDB14030 | MP80 |
| 102MC-SC | 02-70325-02 | 1860114A | TSW-552-BS |
| K9149FF-05 AS KG149FA | BOB1024 | 9418/01-201-10 | ABB 61318968 NDPC-02 |
| Eurotherm 2404 | RKLB57 6180BKR000000-H1111 | KNX /644692 | AVPR100S151213 |
| SDVN-2S | LBB4540/04 F01U508294 HW04/02 WK:2017 | EFCB12T-OE1 | O5H700 |
| GTD-2000Tx | ULFIM-D37M-45-XOR | 1606-XLE240EN | WTD-868-T |
| H2O | MA2-08E | ||
Send the exact order code, quantity and destination for availability, configuration and compatibility review.
