Siemens 6SE7031-7HG84-1JC2 MASTERDRIVES VC Control Module | Replacement, Equivalent & Selection Guide
The Siemens 6SE7031-7HG84-1JC2 is a CUVC (Control Unit Vector Control) module for the Siemens MASTERDRIVES VC series variable-frequency drive (VFD). Designed for high-performance vector control of AC induction and synchronous motors, this module is widely deployed in industrial automation, process control, and motion applications. Konmask.com supplies genuine and compatible replacement units with full traceability.
Technical Specifications
- Part Number: 6SE7031-7HG84-1JC2
- Series: Siemens MASTERDRIVES VC (Vector Control)
- Module Type: CUVC — Control Unit Vector Control
- Rated Output Current: 31.7 A (at 400 V AC)
- Power Range: ~15 kW (400 V, 3-phase)
- Control Mode: Sensorless vector control / closed-loop vector (with encoder)
- Communication: PROFIBUS-DP (via optional CBP2 board), USS protocol
- Digital Inputs: 6 × DI (24 V DC)
- Digital Outputs: 3 × DO (relay)
- Analog Inputs: 2 × AI (±10 V / 0–20 mA)
- Analog Outputs: 2 × AO (0–20 mA)
- Firmware: Compatible with MASTERDRIVES VC firmware V3.x
- Mounting: Plug-in module into MASTERDRIVES VC chassis
- Weight: ~700 g
- Country of Origin: Germany
Compatible Replacement & Equivalent Models
When the original 6SE7031-7HG84-1JC2 is unavailable or discontinued, the following models are commonly evaluated as replacements. Always verify electrical and mechanical compatibility before substitution.
- 6SE7031-7HG84-1JC2 — Original OEM unit (this listing)
- 6SE7031-7EG84-1JC2 — Lower current variant (same CUVC platform, 28 A); verify load requirements
- 6SE7031-7HG84-1BC0 — Earlier firmware revision; may require firmware upgrade
- 6SE7032-1EG84-1JC2 — Next-frame-size CUVC; suitable if upgrading drive chassis
- 6SE7090-0XX84-0AB0 — CUVC blank module (requires parameter cloning from original)
- Siemens SINAMICS G120 / S120 CU320-2 — Modern platform migration option; requires rewiring and re-commissioning
Note: Cross-reference compatibility depends on drive chassis frame size, firmware version, and application requirements. Contact Konmask technical support for a verified match.
Why Choose the Original Model
- ✅ Drop-in replacement — same plug-in form factor, no chassis modification
- ✅ Parameter retention — existing drive parameters (P-codes) remain valid
- ✅ Proven reliability — field-tested in continuous industrial duty cycles
- ✅ Full PROFIBUS-DP support — seamless integration with existing SIMATIC S7 PLC networks
- ✅ Encoder feedback ready — supports closed-loop vector control without additional hardware
Typical Applications
- Pump and fan variable-speed drives in water treatment and HVAC
- Conveyor and hoist control in material handling
- Compressor and extruder drives in process industries
- Crane and winding machine control requiring precise torque regulation
- Retrofit and spare-parts replacement for existing MASTERDRIVES VC installations
System Compatibility
- Drive Platform: Siemens MASTERDRIVES VC (6SE70xx series)
- PLC Integration: SIMATIC S7-300, S7-400 via PROFIBUS-DP
- HMI: SIMATIC OP/TP panels via USS or PROFIBUS
- Engineering Tool: DriveMonitor, STARTER (limited), SIMOVIS
- Encoder Interface: HTL/TTL incremental encoder (via onboard terminal)
Selection Guide
Use the table below to identify the correct CUVC module for your MASTERDRIVES VC drive:
- Step 1 — Identify frame size: Check the drive nameplate for the 6SE70xx order number and frame size (C, D, E, F, GX, HX).
- Step 2 — Confirm rated current: The 6SE7031-7HG84-1JC2 is rated for 31.7 A output. Match to your motor nameplate current.
- Step 3 — Check firmware revision: Suffix -1JC2 indicates firmware revision JC2. Confirm compatibility with your existing parameter set.
- Step 4 — Communication requirement: If PROFIBUS-DP is required, confirm the CBP2 option board is installed in the drive.
- Step 5 — Contact Konmask: Provide your full drive order number and application details for a verified recommendation.
Quality Assurance & Sourcing
- 🔍 Authenticity: All units sourced from authorized distributors or verified industrial surplus with full traceability documentation.
- 📦 Inspection: Each module undergoes visual inspection and functional verification prior to dispatch.
- 🛡️ Warranty: 12-month warranty against manufacturing defects.
- 📋 Documentation: Certificate of conformity and test report available on request.
How to Order
- Add 6SE7031-7HG84-1JC2 to cart and proceed to checkout.
- For bulk orders (>3 units) or urgent requirements, contact us directly for lead time and pricing.
- Provide your application details (drive model, motor rating, control mode) for technical pre-sales support.
- International shipping available — DDP/DAP terms supported for most destinations.
Replacement & Compatibility FAQ
Q: Can I replace 6SE7031-7HG84-1JC2 with a 6SE7031-7EG84-1JC2?
A: Possibly, if your motor’s rated current is within the lower unit’s 28 A rating. Verify motor nameplate data before substitution.
Q: Do I need to re-parameterize after replacing the CUVC module?
A: Yes. Parameters are stored on the CUVC module. Use DriveMonitor to upload parameters from a backup before installing the replacement, then download to the new module.
Q: Is the 6SE7031-7HG84-1JC2 compatible with SINAMICS drives?
A: No. MASTERDRIVES VC and SINAMICS are different hardware platforms. Migration requires full drive replacement and re-commissioning.
Q: What is the lead time for this module?
A: In-stock units ship within 1–3 business days. Contact us for current availability.
Q: Can Konmask provide a parameter backup service?
A: Yes. If you send us your existing drive’s parameter file (.par), we can pre-load it onto the replacement module before shipping.
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