Siemens 6SE7042-1WN84-1CF0 SINAMICS S120 Control Unit | Replacement, Equivalent & Selection Guide
The Siemens 6SE7042-1WN84-1CF0 is a high-performance Control Unit (CU320-2 DP) for the SINAMICS S120 drive system, designed for demanding multi-axis motion control applications in industrial automation. This unit integrates PROFIBUS DP communication and supports vector and servo control modes, making it a core component in complex drive topologies.
At Konmask.com, we specialize in sourcing, verifying, and supplying genuine and compatible Siemens drive components for OEM replacements, system upgrades, and spare-parts inventory.
Technical Specifications
- Part Number: 6SE7042-1WN84-1CF0
- Series: SINAMICS S120
- Module Type: Control Unit CU320-2 DP
- Communication Interface: PROFIBUS DP (up to 12 Mbit/s)
- Control Modes: Vector control, Servo control, V/f control
- Drive Objects Supported: Up to 6 drive objects (axes)
- Onboard I/O: 12 DI / 8 DO / 2 AI / 2 AO
- Memory Card Slot: CompactFlash (CF) card supported
- Power Supply: 24 V DC (via DRIVE-CLiQ or external)
- Operating Temperature: 0 °C to +55 °C
- Protection Class: IP20
- Dimensions (W×H×D): Refer to Siemens S120 CU320-2 datasheet
- Weight: Approx. 1.0 kg
- Firmware: Compatible with STARTER / SINAMICS Startdrive
- Standards: CE, UL, cUL
Compatible Replacement & Equivalent Models
If the 6SE7042-1WN84-1CF0 is unavailable or you are evaluating alternatives, the following models offer functional equivalence or direct replacement compatibility:
- 6SL3040-1MA01-0AA0 — SINAMICS S120 CU320-2 DP (current standard successor)
- 6SL3040-1MA00-0AA0 — CU320-2 DP earlier firmware variant
- 6SE7090-0XX84-0AB0 — SIMOVERT MASTERDRIVES CU (legacy equivalent for older systems)
- 6SL3040-0PA00-0AA0 — CU310-2 DP (single-axis, cost-optimized alternative)
- 6SL3040-1LA01-0AA0 — CU320-2 PN (PROFINET variant, requires network adaptation)
Note: Always verify firmware version, DRIVE-CLiQ topology, and licensed drive objects before substituting. Contact Konmask.com for compatibility confirmation.
Why Choose the Original Model
- Proven Multi-Axis Performance: Supports up to 6 drive objects in a single CU, reducing hardware footprint.
- PROFIBUS DP Native: Seamless integration with existing PROFIBUS networks without additional gateways.
- DRIVE-CLiQ Ecosystem: Full compatibility with Siemens Smart Line Modules, Motor Modules, and SMx sensor modules.
- Safety Functions Ready: Supports STO (Safe Torque Off) and extended safety options via Safety Integrated.
- Long-Term Availability: Siemens S120 platform has an extended product lifecycle with ongoing firmware support.
Typical Applications
- CNC machine tool spindle and feed axis control
- Printing and packaging machinery multi-axis synchronization
- Textile and winding machine tension control
- Conveyor and material handling systems
- Plastics injection molding and extrusion lines
- Crane and hoist drive systems
- Test bench and dynamometer applications
System Compatibility
- Drive System: SINAMICS S120 Booksize / Chassis format
- Line Modules: Active Line Module (ALM), Smart Line Module (SLM), Basic Line Module (BLM)
- Motor Modules: Single Motor Module, Double Motor Module
- Sensors: SMC10, SMC20, SMC30, SME20, SME25 via DRIVE-CLiQ
- Engineering Software: STARTER V4.x+, SINAMICS Startdrive (TIA Portal V13+)
- PLC Integration: SIMATIC S7-300, S7-400, S7-1500 via PROFIBUS DP
- HMI: Compatible with SIMATIC HMI panels via PROFIBUS or MPI
Selection Guide
Use the following criteria to determine if the 6SE7042-1WN84-1CF0 is the right control unit for your application:
- Number of axes: ≤6 axes → CU320-2 DP suitable; >6 axes → consider additional CU or CU320-2 with expansion
- Communication protocol: PROFIBUS DP required → 6SE7042-1WN84-1CF0 / 6SL3040-1MA01-0AA0; PROFINET required → CU320-2 PN (6SL3040-1LA01-0AA0)
- Control mode: Servo / Vector → CU320-2 DP; Simple V/f only → CU310-2 DP may suffice
- Safety requirements: STO only → standard CU; Extended safety (SS1, SLS, SOS) → add Safety Integrated option board
- Budget: New OEM → contact Konmask for pricing; Refurbished / tested → available on request
Quality Assurance & Sourcing
- All units sourced from authorized distributors or verified surplus channels
- Pre-shipment functional test and visual inspection performed
- Original packaging and documentation preserved where available
- Traceability records maintained for each unit
- 12-month warranty on new units; 90-day warranty on refurbished units
- Anti-static packaging and export-grade carton for international shipments
How to Order
- Confirm part number: 6SE7042-1WN84-1CF0
- Specify quantity and required delivery timeline
- Provide application details (optional) for compatibility verification
- Contact us via email or phone for a formal quotation
- Payment via T/T, PayPal, or trade terms (MOQ and credit terms negotiable for B2B)
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Replacement & Compatibility FAQ
Q: Is 6SE7042-1WN84-1CF0 the same as 6SL3040-1MA01-0AA0?
A: They serve the same function (CU320-2 DP) but belong to different hardware revisions. The 6SL3040-1MA01-0AA0 is the current catalog successor. Firmware and parameter migration may be required.
Q: Can I replace 6SE7042-1WN84-1CF0 with a CU320-2 PN?
A: Yes, but you must switch from PROFIBUS DP to PROFINET, which requires PLC and network reconfiguration. Not a drop-in replacement.
Q: Does this unit support Safety Integrated?
A: Basic STO is supported natively. Extended safety functions require the optional Safety Integrated Plus license and appropriate wiring.
Q: What CF card is compatible?
A: Siemens 6SL3054-0EJ00-1BA0 (512 MB) or equivalent industrial-grade CompactFlash card. Consumer CF cards are not recommended.
Q: Can Konmask.com provide the matching firmware version?
A: Yes. Please specify your STARTER or Startdrive version and existing drive firmware when ordering.
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