| Item | Specification |
|---|---|
| Part Number | 6RA2477‑6GS22‑0 |
| Product Family | SIMOREG‑K (6RA24 Series) |
| Product Type | Full‑digital microprocessor DC drive converter |
| Quadrant Operation | 4‑quadrant regenerative operation (B6)A(B6)C bridge |
| Input Power | 3‑phase AC 400 V, 50 / 60 Hz |
| Rated Armature DC Current | 485 A |
| Rated Field Exciter | 250 MRE‑GEEF‑6S22, controllable field rectifier |
| Armature Output Voltage | 0‑420 V DC |
| Control Principle | Closed‑loop speed / current / armature voltage regulation |
| Interfaces | Analog input/output, binary digital I/O, serial USS interface for OP1S operator panel |
| Mounting | Cabinet floor‑mount, requires line‑reactor and fusing |
| Protection Class | IP00 (power unit), control board IP20 |
| Ambient Operating Temperature | 0 °C … +45 °C (derating above 45 °C) |
| Cooling | Forced air fan cooling |
| Product Lifecycle | Discontinued, no new production; only spare‑part / surplus / refurbishment supply |
| Successor Series | SIMOREG DC‑Master 6RA70, later SINAMICS DC‑MASTER 6RA80 |
| Weight | Approx. 185 kg |
| Certifications | CE, UL |
The 6RA2477‑6GS22‑0 belongs to Siemens legacy SIMOREG‑K 6RA24 full‑digital thyristor DC converter family, built for heavy‑duty four‑quadrant variable‑speed DC motor control with energy regeneration back to mains. This unit integrates power thyristor stack, field excitation rectifier, microprocessor closed‑loop regulator, I/O terminals and fan cooling assembly in one floor‑standing cabinet power unit. It supports high armature current up to 485 A DC for large DC motors, with adjustable field excitation for field‑weakening high‑speed operation. Equipped with analog set‑point inputs, binary control signals and USS serial port for OP1S operator panel, it realizes complete drive functions including speed ramp, current limitation, motor protection, fault diagnostics and status message output. The device is IP00 power‑section design, must be installed inside customer control cabinet with proper input fusing and line reactor. The product is fully discontinued by Siemens; new units are no longer manufactured, available only as surplus, refurbished or spare‑part replacement for existing old‑plant installations.
