Conveyor & Variable Speed Drive Solution — SIEMENS 6SL3544-0FB20-1FA0 | SINAMICS G120D Series
Where This Product Is Used
The SIEMENS 6SL3544-0FB20-1FA0 CU250D-2 DP is the control intelligence behind distributed drive systems in demanding industrial environments. Engineers specify this unit across the following application sectors:
- Conveyor & Material Handling: Baggage handling at airports, automotive assembly lines, parcel sorting centers — where distributed motor control eliminates central cabinet wiring.
- Pump & Fan Systems: Water treatment plants, HVAC systems, and process cooling towers requiring precise speed regulation and energy savings.
- Intralogistics & Warehousing: High-bay storage, pallet conveyors, and AGV charging stations with PROFIBUS DP network integration.
- Food & Beverage Processing: Hygienic conveyor lines where IP65-rated distributed drives reduce installation footprint.
- Mining & Bulk Handling: Belt conveyors and bucket elevators requiring robust, decentralized motor management.
Technical Specifications
| Part Number (SKU) | 6SL3544-0FB20-1FA0 |
| Series | SINAMICS G120D |
| Control Unit Type | CU250D-2 DP |
| Fieldbus Interface | PROFIBUS DP (RS-485) |
| Encoder Interface | HTL/TTL incremental encoder input |
| Digital Inputs | 6 × DI (24 V DC) |
| Digital Outputs | 2 × DO (relay) |
| Analog Inputs | 2 × AI (0–10 V / 0–20 mA) |
| Analog Outputs | 1 × AO (0–20 mA) |
| Protection Rating | IP65 (when mated with PM250D Power Module) |
| Ambient Temperature | -10 °C to +40 °C (operating) |
| Supply Voltage | 24 V DC (via Power Module) |
| Weight | 780 g |
| Manufacturer | SIEMENS AG |
| Country of Origin | Germany / China (per batch) |
Why Engineers Specify This Model
- Distributed Architecture: Mounts directly on the motor, eliminating long cable runs and reducing EMC interference in large conveyor systems.
- PROFIBUS DP Native: Seamless integration into SIMATIC S7 PLC networks without additional gateways — reduces commissioning time significantly.
- Vector Control with Encoder Feedback: CU250D-2 supports closed-loop speed and torque control, enabling precise positioning on conveyor indexing applications.
- Energy Recovery: Compatible with PM250D regenerative power modules — feeds braking energy back to the supply grid.
- STARTER / TIA Portal Ready: Full parameterization via SIEMENS STARTER software or TIA Portal Drive Control Chart (DCC).
- Proven Reliability: SINAMICS G120D is deployed in millions of drive axes globally across automotive, logistics, and process industries.
Complete System Bill of Materials
The CU250D-2 DP (6SL3544-0FB20-1FA0) is the control unit only. A complete SINAMICS G120D drive system requires:
- Power Module: PM250D (e.g., 6SL3525-0PE21-8AA1 for 1.5 kW) or PM240D series
- Motor: SIEMENS 1LE1 / 1LA series induction motor or third-party IEC motor
- Fieldbus Cable: PROFIBUS DP shielded cable (e.g., 6XV1830-0EH10)
- Termination Resistor: Required at bus ends (120 Ω)
- Operator Panel (optional): BOP-2 (6SL3255-0AA00-4CA1) for local parameterization
- PC Connection Cable (optional): USB-to-RS232 adapter for STARTER software
Compliance & Industry Standards
- CE Marked — EU Low Voltage Directive 2014/35/EU & EMC Directive 2014/30/EU
- UL Listed (File E164110) — suitable for North American installations
- IEC 61800-5-1: Adjustable speed electrical power drive systems — safety requirements
- IEC 61800-3: EMC requirements for drive systems
- PROFIBUS DP: IEC 61158 / EN 50170 compliant
- RoHS 2 Compliant (Directive 2011/65/EU)
Quality Assurance & Sourcing
- Authenticity: All units sourced from authorized SIEMENS distribution channels or verified surplus with full traceability documentation.
- Inspection: Each unit undergoes visual inspection, label verification, and functional power-on test before dispatch.
- Packaging: Ships in original or equivalent ESD-safe anti-static packaging with foam protection.
- Warranty: 12-month replacement warranty against manufacturing defects.
- Documentation: SIEMENS datasheet and wiring diagram available upon request.
How to Source This Part
Stock availability for the 6SL3544-0FB20-1FA0 fluctuates due to global supply chain conditions. Konmask.com maintains dedicated inventory for industrial buyers with the following sourcing options:
- In-Stock Orders: Add to cart and checkout — ships within 2–5 business days via DHL Express or FedEx International Priority.
- Bulk / Project Quotes: Email support@konmask.com with your project BOM for volume pricing.
- Urgent Requirements: Call +0086 19859288691 for same-day stock confirmation and expedited shipping options.
- Lead Time Orders: If out of stock, we can source from SIEMENS authorized channels with typical 4–8 week lead time.
Application-Specific FAQ
Q: Can the 6SL3544-0FB20-1FA0 be used without a PROFIBUS network?
A: Yes. The CU250D-2 DP supports standalone operation via digital I/O control or local BOP-2 operator panel. PROFIBUS is optional.
Q: What is the maximum motor power this control unit supports?
A: The CU250D-2 DP is compatible with PM250D and PM240D power modules ranging from 0.75 kW to 7.5 kW (400 V AC). Motor power is determined by the Power Module selected.
Q: Is this unit compatible with SIMATIC S7-300 / S7-400 PLCs?
A: Yes. Via PROFIBUS DP, the G120D integrates natively with S7-300, S7-400, and S7-1500 using standard GSD files available from SIEMENS.
Q: Can I use TIA Portal to parameterize this drive?
A: Yes. SINAMICS G120D is fully supported in TIA Portal V14 and above via the Drive Control Chart (DCC) function block library.
Q: What encoder types are supported?
A: The CU250D-2 DP supports HTL (High Threshold Logic) and TTL incremental encoders for closed-loop vector control applications.
Q: Is the IP65 rating on the control unit itself?
A: IP65 protection is achieved when the CU250D-2 DP is correctly mated with a compatible PM250D or PM240D power module. The control unit alone is not IP65 rated.
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