Siemens SINAMICS G120 VFD Control Panel

Engineered VFD panels built around the modular SINAMICS G120 — PM240-2 power modules (6SL3210 series) with PROFINET control units (CU250S-2 PN) for pumps, fans, conveyors and process drives; IEC 61439, FAT-tested, export-ready.

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Key Takeaways

Custom G120 VFD panels: PM240-2 power modules (6SL3210 series) with CU250S-2 PN (6SL3246) control units — or I/O-fieldbus CUs per your network.
Single-drive panels or multi-drive pump/fan packages with V/f and sensorless vector, built-in pump technology functions and multi-pump management.
Integrated Safety (STO) on current control units; PROFINET diagnostics into TIA Portal/WinCC for S7-1500 architectures.
Panel engineering: incoming protection, EMC layout, input reactors/harmonic treatment per system, compartment cooling rated for 50°C ambient where needed.
IEC 61439 build, 100% FAT with drive parameter verification, genuine Siemens channel supply, 12-month warranty.

SINAMICS G120 is Siemens' modular low-voltage drive platform for industrial variable-speed control — widely the default in plants standardizing on TIA Portal and S7-1500. Its split design (power module + control unit) suits panel building particularly well: heat-producing power components and control electronics are engineered separately inside the cabinet.

SENTRADO designs and builds complete G120-based VFD panels for export projects — from single 0.75 kW pump drives to multi-motor pump-station packages — with the protection, harmonics treatment, cooling and FAT documentation that consultants expect.

Typical panel configuration

Drive platform	SINAMICS G120 modular: Power Module PM240-2 (6SL3210 series) + Control Unit CU250S-2 PN (6SL3246) for PROFINET / vector performance
Power range	Standard frame sizes covering ~0.75–250 kW in PM240-2; multi-drive panels combined per motor schedule
Typical duties	Pumps, fans, blowers (variable torque); conveyors and process drives (sensorless vector); not for servo/positioning — ask for our servo scope instead
Control functions	V/f and sensorless vector; pump/fan technology controller, multi-pump staging, hibernation, PID; STO safety integrated
Communication	PROFINET via CU250S-2 PN into S7-1500/WinCC; other fieldbus CUs available; Modbus RTU fallback
Panel scope	Incoming breaker/fuses, reactor/EMC filter per study, VFD compartment, control circuit, terminations, VFD-rated cabling
Thermal / enclosure	IP54 (IP55/IP65 outdoor); forced ventilation or heat-exchanger cooling; derated design for up to 50°C ambient on Gulf projects
Standards & FAT	IEC 61439 / IEC 60204; parameter check, insulation tests, control simulation at FAT; video or SGS/BV/TÜV witness
Lead time	Approx. 11–14 weeks; project schedule confirmed against your required delivery date

Pump-station specialization

Pressure/flow control loops, multi-pump alternation and staging, dry-run/no-flow protection, run-hour balancing — proven pump-station architecture.

TIA Portal integration

Drives configured in the TIA framework alongside the PLC; drive diagnostics, alarms and energy data surface in WinCC without gateway workarounds.

Energy savings built in

We document the affinity-law saving case for fixed-speed pump/fan retrofits — typically 20–40% on throttled systems — before order.

Power-quality engineering

Input reactors, EMC filters or harmonic mitigation sized to your switchboard; motor-cable length and du/dt effects handled at layout stage.

Genuine Siemens channel

Certified System Integrator sourcing: authentic power and control modules with manufacturer warranty and global service network.

Full documentation

Single-line, GA, parameter lists, FAT report and spares recommendation in English; parameter files handed over at completion.

To quote, send the motor schedule: motor kW and rated current, voltage (400V/480V/690V), duty (pump/fan/conveyor), control requirements (local/remote/PROFINET), cable length from panel to motor, and ambient. We size drives, recommend reactor/filter packages, and return a budgetary indication within 24 hours. Panels are frequently delivered together with our PLC cabinets and MCCs as an integrated package under one FAT.

Frequently Asked Questions

Straight answers from our engineering team.

What G120 part numbers do your panels use?

Power Modules are PM240-2 frames (6SL3210-1PE series typical) selected to motor kW and current; Control Units are commonly CU250S-2 PN (6SL3246-0BA22-1FA0) for PROFINET/vector. Exact MLFBs are configured to your project — not sold as fixed catalog items.

G120 or G120C?

G120C is the compact all-in-one variant for smaller standalone drives; the modular G120 offers higher powers, separate CU/PM replacement and stronger thermal design inside panels. For cabinet-mounted multi-drive packages we default to modular G120.

Can the panel control multiple pumps?

Yes — multi-pump panels with lead/lag alternation, staging and hibernation are standard for water projects; see our pump-station architecture reference for the full architecture.

Do I need a reactor or EMC filter?

Depends on grid impedance, installed drive power and motor cable length. We evaluate from your electrical data and include the appropriate input reactor, EMC filter or harmonic mitigation in the panel build.

How does G120 connect to S7-1500?

Native PROFINET via the CU250S-2 PN control unit: the drive appears in TIA Portal hardware config with full diagnostics and telemetry, and safety via PROFIsafe where specified.

Are these brand-new genuine Siemens drives?

Yes — new, genuine SINAMICS units from Siemens channels with manufacturer warranty; we do not use grey-market or refurbished power modules in export panels.