Siemens 6SL3244-0BB00-1PA1 CU240B-2DP – PROFIBUS DP Control Unit | SINAMICS G120 Platform
Engineering Background
The SINAMICS G120 series represents Siemens’ flagship modular drive platform for industrial variable-speed applications. The CU240B-2DP Control Unit is the PROFIBUS DP-enabled variant of the CU240B-2 family, designed to deliver deterministic fieldbus communication with minimal engineering overhead in distributed automation architectures.
Product Positioning
Part number 6SL3244-0BB00-1PA1 is the standard CU240B-2DP control unit without safety functions, optimized for cost-sensitive OEM machine builders and system integrators who require reliable PROFIBUS DP connectivity with the SINAMICS G120 Power Module ecosystem. It is the preferred choice for conveyor systems, pumps, fans, and compressors in process and factory automation environments.
Complete Technical Specifications
| Part Number | 6SL3244-0BB00-1PA1 |
| Product Family | SINAMICS G120 – CU240B-2DP |
| Manufacturer | Siemens AG |
| Control Unit Type | CU240B-2DP (without safety functions) |
| Fieldbus Interface | PROFIBUS DP (RS-485, up to 12 Mbit/s) |
| Digital Inputs | 6 × DI (24 V DC, isolated) |
| Digital Outputs | 3 × DO (relay, 30 V DC / 0.5 A) |
| Analog Inputs | 2 × AI (0–10 V / 0–20 mA, 10-bit) |
| Analog Outputs | 1 × AO (0–20 mA) |
| Supply Voltage | 24 V DC (external, via Power Module) |
| Compatible Power Modules | PM240, PM240-2, PM250, PM260 |
| Ambient Temperature | -10 °C to +60 °C (operation) |
| Storage Temperature | -40 °C to +70 °C |
| Protection Class | IP20 |
| Degree of Pollution | 2 |
| Approvals | CE, UL, cUL, RCM |
| Weight | Approx. 1.5 kg (with PM) |
| Firmware | Upgradeable via SD card / STARTER / TIA Portal |
| Parameter Storage | Non-volatile memory (MMC/SD card slot) |
Proven Application Environments
- Conveyor & Material Handling: Precise speed regulation with PROFIBUS DP cyclic data exchange for multi-axis coordination
- Pump & Fan Control: Energy-saving PID control with auto-tuning for HVAC and water treatment plants
- Compressor Drives: Stable torque control under variable load conditions in oil & gas and chemical processing
- Packaging Machinery: Fast setpoint response via PROFIBUS DP for high-throughput OEM lines
- Crane & Hoist Systems: Integrated brake control logic with safe deceleration ramps
- Water & Wastewater: Robust operation in high-humidity environments with conformal coating options
Engineering Advantages
- Modular Architecture: Hot-swap CU replacement without rewiring – reduces MTTR in production environments
- PROFIBUS DP Master/Slave: Supports GSD file integration with Siemens S7-300/400/1200/1500 and third-party PLCs
- BICO Parameterization: Flexible signal interconnection via Binector-Connector technology eliminates external wiring
- Integrated PID Controller: Closed-loop process control without additional hardware
- Automatic Motor Identification (AMI): One-button motor data acquisition for rapid commissioning
- TIA Portal & STARTER Compatible: Full integration with Siemens engineering toolchain
- SD Card Parameter Backup: Instant parameter cloning across multiple drives on the production floor
System Architecture & Signal Flow
The 6SL3244-0BB00-1PA1 interfaces directly with the SINAMICS G120 Power Module via the Drive-CLiQ-compatible backplane connector. The PROFIBUS DP port (9-pin Sub-D) connects to the PLC DP master, enabling cyclic process data (PZD) and acyclic parameter access (PKW) in a single cable run. The onboard I/O terminal block provides local override capability for commissioning and maintenance without fieldbus dependency.
Signal flow: PLC (PROFIBUS DP Master) → CU240B-2DP → Power Module (PM240/PM250) → Motor
Parameter access is available via: PROFIBUS DP acyclic channel | BOP-2 operator panel | STARTER software | TIA Portal Drive Library
Sourcing & Quality Verification
- ✅ OEM-Sourced: All units sourced from authorized Siemens distribution channels or verified surplus with full traceability
- ✅ Pre-Shipment Inspection: Each unit inspected for physical integrity, firmware version, and label authenticity
- ✅ Serialization Check: Siemens serial number verified against production records where applicable
- ✅ Packaging Integrity: Original Siemens anti-static packaging preserved; repackaged units clearly disclosed
- ✅ Warranty: 12-month Konmask operational warranty covering manufacturing defects
Procurement Process
- Confirm Compatibility: Verify your Power Module model (PM240 / PM240-2 / PM250 / PM260) and firmware version requirements
- Request Quote: Contact support@konmask.com for volume pricing, lead time, and export documentation
- Order Placement: Purchase order accepted via website checkout, bank transfer (T/T), or trade platform
- Shipping: DHL / FedEx / UPS express worldwide; sea freight available for bulk orders; export customs documentation included
- After-Sales: Technical commissioning support available via email and WhatsApp within 24 hours
Technical FAQ
Q: Is the 6SL3244-0BB00-1PA1 compatible with SINAMICS G120C?
A: No. The CU240B-2DP is designed for the modular G120 platform (PM240/PM250/PM260). The G120C is a compact integrated drive and uses a different architecture.
Q: Can I use this CU with a third-party PROFIBUS DP master (e.g., Rockwell, Schneider)?
A: Yes. The CU240B-2DP is a standard PROFIBUS DP slave. Import the Siemens GSD file (SIEM80C3.GSD) into your engineering tool to configure the DP slave.
Q: What is the difference between CU240B-2DP and CU240E-2DP?
A: The CU240E-2DP adds integrated safety functions (STO, SS1, SLS) certified to SIL2/PLd. The CU240B-2DP is the standard variant without safety functions, suitable for non-safety-critical applications.
Q: How do I back up parameters?
A: Insert a Siemens-compatible MMC/SD card and use parameter P0971 (save to card) or perform an automatic upload via STARTER / TIA Portal.
Q: What firmware version is pre-installed?
A: Firmware version varies by production batch. Please contact us to confirm the version on available stock. Firmware upgrade files are available from Siemens Support.
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