Description
Product Overview
6SL3244-0BA20-1PA0 is a CU240S DP control unit for Siemens SINAMICS G120 modular variable frequency drive system. It serves as the drive controller core, paired with G120 power modules to realize closed-loop speed control, logic processing and communication. This variant is equipped with PROFIBUS DP interface, built-in I/O terminals, encoder interface and brake relay output. The product has been discontinued by Siemens and supplied as legacy spare parts only.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | Siemens |
| Part Number | 6SL3244-0BA20-1PA0 |
| Product Type | SINAMICS G120 CU240S DP Control Unit |
| Communication | PROFIBUS DP |
| Digital Inputs | 9 DI |
| Digital Outputs | 3 DO (including integrated brake relay) |
| Analog Inputs | 2 AI |
| Analog Outputs | 2 AO |
| Sensor Interface | PTC / KTY motor temperature input |
| Feedback | Encoder interface |
| Memory Card Slot | MMC slot for parameter backup / firmware upgrade |
| Enclosure Rating | IP20 |
| Operating Temperature | -10 ~ +50 °C |
| Humidity | 5%–95% RH, non-condensing |
| Mounting | DIN rail mount, stacked onto G120 power module |
| Certifications | CE, UL, CSA |
| System Compatibility | SINAMICS G120 power modules |
Key Features
- PROFIBUS DP Industrial Communication: High-speed fieldbus connection to Siemens S7 PLCs for setpoint transmission, status feedback and fault diagnostics.
- Rich Built-in I/O Resources: 9 digital inputs, 3 digital outputs, 2 analog inputs and 2 analog outputs to handle interlock, sensor signals and analog setpoints without extra I/O modules.
- Motor Thermal Protection: Supports PTC and KTY temperature sensors to monitor motor winding temperature and trigger overheat protection.
- Encoder Feedback Interface: Supports speed closed-loop control with encoder for high-precision speed regulation.
- Integrated Brake Relay: Built-in EM brake relay output to control motor mechanical brake directly.
- MMC Memory Card Slot: Stores drive parameters and firmware; supports quick parameter restoration during spare replacement.
- Modular Stack Design: Clips directly on top of G120 power module, compact cabinet layout.
Applications
- Conveyor systems in material handling
- Pumps, fans and compressors
- Packaging machinery and textile production lines
- Mixers, extruders and general factory automation equipment
- Retrofit of existing G120 drive systems
Installation & Maintenance Notes
- Power down the drive and implement lockout-tagout before removing or installing the control unit.
- ESD protection required during handling to avoid damage to onboard electronics.
- Properly match CU and power module ratings when assembling the G120 drive.
- Download parameter backup to MMC card for quick recovery before replacement.
- Separate signal wiring from high-current motor power cables to reduce EMI interference.
- Verify firmware compatibility and commission drive parameters via STARTER software after replacement.
- Check PROFIBUS address and bus termination resistor during commissioning.
FAQ
Q: What does CU240S DP stand for? A: CU = Control Unit; 240S = S-type standard unit; DP = PROFIBUS DP communication interface.
Q: Is 6SL3244-0BA20-1PA0 still in production? A: This model is discontinued by Siemens; available stock is new surplus or refurbished spare parts for legacy G120 systems.
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