Siemens 6RA7091-6FS22-0 DC Converter | Replacement, Equivalent & Selection Guide
The Siemens 6RA7091-6FS22-0 is a fully digital DC drive converter from the SIMOREG DC Master (6RA70) series, engineered for demanding industrial motor control applications. This page provides complete technical specifications, compatible replacement models, equivalent alternatives, and a structured selection guide to help engineers and procurement teams make informed sourcing decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6RA7091-6FS22-0 |
| Series | SIMOREG DC Master (6RA70) |
| Manufacturer | Siemens AG |
| Drive Type | 4-Quadrant DC Converter (Fully Digital) |
| Rated DC Output Current | 900 A |
| AC Supply Voltage | 3-phase, 400 V AC (±15%) |
| Supply Frequency | 45–65 Hz |
| Armature Circuit | Fully controlled 3-phase bridge (B6C) |
| Field Circuit | Single-phase semi-controlled bridge (B2HZ) |
| Cooling Method | Forced air cooling (fan) |
| Protection Degree | IP00 (chassis unit) |
| Communication Interface | PROFIBUS DP (optional), USS protocol |
| Control Technology | Digital closed-loop (speed & torque) |
| Ambient Temperature | 0 °C to +40 °C (operating) |
| Standards | CE, UL (cULus), EN 60146 |
| Weight | Approx. 75 kg |
Compatible Replacement & Equivalent Models
When the original 6RA7091-6FS22-0 is unavailable or discontinued, the following models offer direct or near-equivalent functionality. Always verify electrical ratings and mechanical dimensions before substitution.
| Model | Brand | Type | Compatibility Notes |
|---|---|---|---|
| 6RA7093-4GS22-0 | Siemens | Direct upgrade (higher current) | Same 6RA70 series; verify current rating match |
| 6RA8091-6DS22-0 | Siemens | SINAMICS DCM (next-gen) | Functional replacement; requires parameter migration |
| DCS800-S02-0900-05 | ABB | DCS800 DC Drive | Equivalent current class; different wiring layout |
| 590P/0900/500/0011 | Parker SSD | 590P Series DC Drive | Compatible current range; check field supply specs |
| MD500-DC-900A | Inovance | MD500 DC Drive | Cost-effective alternative; verify PROFIBUS support |
Why Choose the Original Model
- Proven reliability — The SIMOREG 6RA70 series has over 20 years of field-proven performance in heavy industry.
- Seamless SIMATIC integration — Native PROFIBUS DP and USS protocol support for direct integration with Siemens S7 PLC systems.
- Precise torque & speed control — Fully digital closed-loop control with fast dynamic response for demanding processes.
- Comprehensive diagnostics — Built-in fault memory, parameter logging, and PMU operator panel support.
- Wide ecosystem — Compatible with Siemens STARTER, DriveMonitor, and SIMATIC PDM commissioning tools.
Typical Applications
- Paper & printing machine main drives
- Rolling mill and metal processing lines
- Crane and hoist drive systems
- Extruder and winding/unwinding machines
- Test bench and dynamometer drives
- Marine and offshore auxiliary drives
System Compatibility
- PLC Systems: Siemens SIMATIC S7-300, S7-400, S7-1500 (via PROFIBUS DP)
- HMI: Siemens SIMATIC HMI panels (TP/OP series)
- Engineering Tools: STARTER v4.x+, DriveMonitor, SIMATIC PDM
- Fieldbus: PROFIBUS DP (CBP2 board), USS over RS-485
- Motor Types: Separately excited DC motors (shunt-wound)
Selection Guide
Use the following criteria to confirm the 6RA7091-6FS22-0 is the correct model for your application, or to identify the right alternative:
- Step 1 — Current Rating: Confirm your DC motor’s rated armature current ≤ 900 A.
- Step 2 — Supply Voltage: Verify 3-phase 400 V AC supply availability at the installation site.
- Step 3 — Quadrant Requirement: 4-quadrant operation required? This model supports regenerative braking.
- Step 4 — Communication: PROFIBUS DP required? Confirm CBP2 option board is included or ordered separately.
- Step 5 — Enclosure: IP00 chassis unit — requires installation in a suitable control cabinet (min. IP54).
- Step 6 — Cooling: Ensure adequate forced-air ventilation clearance per Siemens installation guidelines.
Quality Assurance & Sourcing
- All units sourced through authorized distribution channels or verified surplus with full traceability.
- Pre-shipment inspection includes visual check, label verification, and where applicable, power-on functional test.
- Original factory packaging preserved where available; anti-static and moisture-proof packaging for all shipments.
- Counterfeit prevention: serial number and date code verification against Siemens product databases.
- Warranty: 12 months from date of shipment (subject to terms & conditions).
How to Order
- Online: Add to cart directly on this page — stock availability shown in real time.
- Email RFQ: Send your BOM or part number list to [email protected]
- Phone / WhatsApp: +0086 19859288691 (Mon–Fri, 09:00–18:00 CST)
- Lead Time: In-stock orders ship within 1–3 business days; sourced orders 5–15 business days.
- Payment: T/T, PayPal, credit card, and trade assurance accepted.
Replacement & Compatibility FAQ
Q: Is the 6RA7091-6FS22-0 still in production?
A: The SIMOREG 6RA70 series has been phased out by Siemens in favor of the SINAMICS DCM (6RA80) series. New production units may have limited availability; refurbished and surplus stock are the primary sourcing options.
Q: Can the SINAMICS DCM 6RA8091 directly replace the 6RA7091-6FS22-0?
A: Functionally yes — the 6RA80 series is the designated successor. However, parameter sets are not directly transferable and commissioning with STARTER software is required.
Q: What is the difference between 6RA7091-6FS22-0 and 6RA7091-6GS22-0?
A: The digit in position 8 of the order number indicates the field supply voltage variant. Verify your motor’s field voltage requirement before ordering.
Q: Does Konmask provide installation and commissioning support?
A: Yes — our technical team can provide remote commissioning guidance and parameter backup/restore services. Contact us for details.
Q: What warranty is provided on surplus/refurbished units?
A: All units carry a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: [email protected] | +0086 19859288691
