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Siemens
6SL3111-4VE21-6FA1
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SKU: 2100000019106
$4,875.00
Contact us for pricing
2-Year Warranty
Free Diagnostics
5–30 Day Turnaround
Nationwide Service
Repair option: send in your faulty unit for component-level repair — $4,875.00 with free diagnostics, a 2-year warranty, and a 5–30 business day turnaround. Repair typically costs 40–70% of a new unit, saving you 30–60%. Learn more about our VFD repair service.
6SL3111-4VE21-6FA1 repair service is available at Flexa Systems for facilities running Siemens SINAMICS S120 Combi Power Module configurations that have experienced unexpected downtime. Siemens 6SL3111-4VE21-6FA1 repair covers the full internal assembly of this multi-axis module, and we also stock 6SL3111-4VE21-6FA1 refurbished units ready for immediate exchange when turnaround time is critical. This Combi Power Module accepts a 3-phase AC 400V input at 16 kW and distributes power across up to four output axes rated at 18 A, 9 A, 5 A, and 5 A respectively, making it a compact solution for coordinated multi-axis motion in a single cabinet footprint. Engineers searching for 6SL3111-4VE21-6FA1 troubleshooting support will find this unit commonly deployed in CNC machining centers, packaging lines, and automated material handling systems where precise axis synchronization is mandatory. The module interfaces directly with S120 Motor Modules and the S120 Control Unit over the DRIVE-CLiQ communication backbone, meaning any internal failure can cascade across all connected axes simultaneously. For facilities asking where to repair Siemens VFD hardware quickly, our industrial VFD repair team performs component-level diagnostics on the power stage, gate driver circuitry, and DC bus capacitor banks specific to this module. If you need to buy 6SL3111-4VE21-6FA1 USA stock or arrange an advance exchange, Flexa Systems maintains inventory and can ship same-day from our Lewisville, TX facility to customers nationwide.
Technical Specifications
Part Number
6SL3111-4VE21-6FA1
Manufacturer
Siemens
Voltage
AC 400V
Current Rating
18 A
Power Rating
16 kW
Package / Type
SINAMICS S120
Compatibility
The 6SL3111-4VE21-6FA1 is compatible with the Siemens SINAMICS S120 platform and is engineered to operate alongside S120 Motor Modules such as the 6SL3120-1TE21-8AA3 and 6SL3120-1TE23-0AA3, connecting via the integrated DRIVE-CLiQ interface for closed-loop speed and torque control. Siemens 6SL3111-4VE21-6FA1 integration is supported under TIA Portal V15 and later using the STARTER commissioning tool or Startdrive add-in, and the module communicates upstream with S120 CU320-2 Control Units including the 6SL3040-1MA00-0AA0. The 6SL3111-4VE21-6FA1 replacement for earlier S120 Booksize Power Modules requires verification of DRIVE-CLiQ topology and firmware compatibility, but it supports both synchronous and asynchronous motor types with HTL and TTL encoder feedback through the connected Motor Modules. This module also operates within PROFINET and PROFIBUS-based automation networks when paired with the appropriate S120 Control Unit, and it conforms to EN 61800-5-1 safety standards, making it suitable for integration with Safety Integrated functions like STO and SS1.
Service Options
Repair Service
Ship your faulty 6SL3111-4VE21-6FA1 to our facility. Our expert technicians perform IGBT testing, capacitor inspection, gate driver diagnostics, and full load testing. Typical turnaround: 5–7 business days. 2-year warranty included.
Refurbished
In-stock Siemens 6SL3111-4VE21-6FA1 variable frequency drive, reconditioned to OEM specifications and verified under load. Ships immediately. 2-year warranty included.
Brand New
New 6SL3111-4VE21-6FA1 in original Siemens packaging. Full manufacturer warranty applies. Contact us to confirm availability and lead time.
Common Failure Modes
IGBT desaturation fault (F30015) triggered during acceleration on one output axis — a known 6SL3111-4VE21-6FA1 fault pattern caused by degraded gate driver optocouplers on the 18 A output stage, often misdiagnosed as a motor winding fault.
DC bus undervoltage alarm (A06900) combined with asymmetric input phase current, typically resulting from failed inrush suppression components in the rectifier section of this Combi module, particularly in units operating near rated load continuously.
DRIVE-CLiQ communication loss fault (F01910) appearing on all downstream Motor Modules simultaneously, which points to a failed DRIVE-CLiQ hub IC on the Combi module itself rather than individual motor cable faults — critical for 6SL3111-4VE21-6FA1 troubleshooting to distinguish from wiring issues.
Electrolytic DC bus capacitor degradation causing repeated F06200 overcurrent faults across multiple axes at moderate load, a failure mode accelerated by high ambient temperatures above 40°C and inadequate cabinet ventilation in the installed enclosure.
Frequently Asked Questions
Is the 6SL3111-4VE21-6FA1 compatible with other Siemens S120 modules, and can it replace units from other drive series?
The 6SL3111-4VE21-6FA1 compatible with the full SINAMICS S120 Booksize ecosystem, and it is interchangeable with other S120 Combi Power Modules of matching power ratings such as the 6SL3111-4VE21-6EA1, provided firmware versions and DRIVE-CLiQ topology are aligned before commissioning. It is not a direct drop-in 6SL3111-4VE21-6FA1 replacement for SINAMICS G120 or G120C drives, as those platforms use a fundamentally different power and control architecture without DRIVE-CLiQ. Cross-platform replacement from ABB ACS550 or Yaskawa A1000 series to this S120 Combi module requires full rewiring, control unit selection, and TIA Portal recommissioning due to differences in communication protocol and encoder interface. Always confirm DC bus voltage rating and axis current distribution requirements before swapping any S120 Combi module variant.
How do I know whether my 6SL3111-4VE21-6FA1 is worth repairing or should be replaced outright?
A Siemens 6SL3111-4VE21-6FA1 unit is generally a strong candidate for 6SL3111-4VE21-6FA1 repair when faults are isolated to specific subsystems such as gate driver boards, capacitor banks, or DRIVE-CLiQ interface ICs, rather than widespread damage to the power bus bars or transformer core. Units that have sustained physical damage from a catastrophic overcurrent event — such as burned PCB traces across multiple layers, fused IGBT modules, or cracked bus capacitors with electrolyte leakage — may have repair costs that approach replacement cost and should be evaluated with a formal diagnostic quote. Fault codes F30015, F06200, and A06900 in isolation are almost always repairable at the component level, while simultaneous failure across all four output axes after a confirmed supply surge warrants a closer cost-benefit review. Flexa Systems provides free diagnostics on every unit received, so you receive a clear repair-vs-replace recommendation before any work is authorized.
Where can I get 6SL3111-4VE21-6FA1 repair service with a warranty?
Flexa Systems, based in Lewisville, TX, provides complete 6SL3111-4VE21-6FA1 repair service with a 2-year warranty on all repaired and refurbished units, covering both parts and labor. Our standard repair turnaround is 5 to 7 business days from receipt, with expedited options available for critical production lines, and we ship repaired units to customers nationwide with full functional test documentation included. If your production schedule cannot accommodate downtime, we maintain exchange inventory so you can buy 6SL3111-4VE21-6FA1 USA stock directly from us and ship your core unit back for credit. Contact our technical team to arrange a prepaid inbound shipping label, free diagnostics, and a firm repair quote before committing to any service.
Where can I get 6SL3111-4VE21-6FA1 repair service with a warranty?
Flexa Systems provides professional 6SL3111-4VE21-6FA1 repair service from our facility in Lewisville, TX, serving customers nationwide. Standard turnaround is 5–7 business days from receipt and all repaired units ship with a 2-year warranty. Rush service (2–3 business days) is also available.
Flexa Systems specializes in Siemens 6SL3111-4VE21-6FA1 variable frequency drive repair, supplying refurbished and new units backed by a 2-year warranty. All drives are load-tested before shipping. Serving industrial facilities nationwide from Lewisville, TX.
Technical Specifications
Part Number:
6SL3111-4VE21-6FA1
Manufacturer:
Siemens
Voltage:
AC 400V
Current:
18 A
Power:
16 kW
Type:
SINAMICS S120
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