GE DS200SDCCG1AFD Speed‑Drive Control Card (SDCC)

Description

Hardware & Electrical Specifications

‑ Model: DS200SDCCG1AFD ‑ Part Number: DS200SDCCG1AFD ‑ Module Type: Mark‑V EX2000 / DM2000 SDCC VME Drive‑Control PCB Board ‑ Mounting: Standard 6U VME slide‑in rack‑mount with front‑panel ejector latches ‑ Power supply: +5 VDC, ±15 VDC supplied from VME backplane; typical power consumption approx 7‑10 W ‑ On‑board Processors: Three 16‑bit DSP multi‑processor parallel‑processing architecture for real‑time drive algorithm ‑ Memory: EPROM for firmware; dual‑port shared RAM for high‑speed inter‑processor data exchange ‑ Configuration components: 8 on‑board hardware jumpers for drive‑mode, rack‑address and signal‑path assignment; partial jumpers reserved for factory test only ‑ Connectors: Dual rear VME backplane connectors; multi‑pin ribbon‑cable field‑signal interfaces ‑ Diagnostics resources: Front‑panel multi‑LED array for power‑status and drive‑fault indication; large quantity of on‑board metal test‑point posts for waveform measurement ‑ PCB treatment: Industrial conformal‑coated multilayer circuit board (‑AFD revision, improved EMI suppression filter circuit) ‑ Compatibility note: Exclusively for GE Speedtronic Mark‑V gas‑steam turbine, EX2000 generator‑excitation and DIRECTO‑MATIC2000 DC‑drive platforms; not drop‑in compatible with Mark‑VI / Mark‑VIe. After replacement, strictly duplicate original jumper‑configuration, guarantee dual VME‑backplane connectors fully engaged, confirm firmware version matches system requirement, measure key signal waveforms via test‑points and validate drive closed‑loop regulation performance.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃ ‑ Storage temperature: −40 ℃ ~ +85 ℃ ‑ Relative humidity: 5%‑95% non‑condensing ‑ Installation location: Indoor turbine / drive control cabinet, Pollution Degree 2, IP20 ‑ EMC compliance: Industrial EMC requirements for power‑generation excitation‑drive equipment ‑ Certifications: CE, UL compliant for power‑plant control‑system components

Mechanical Data

‑ Board dimension: 233 mm × 160 mm (standard 6U VME form‑factor) ‑ Mounting: VME rack slide‑in assembly with front‑panel ejector latches ‑ Weight: approx 0.87 kg

Main Functions

1. Three‑DSP parallel‑computing hardware executes real‑time drive‑control algorithm for EX2000 excitation and DM2000 DC‑drives: collects analog armature‑voltage / current feedback signals, completes SCR firing‑angle calculation, implements current‑loop / speed‑loop closed‑loop regulation.
2. High‑speed bidirectional data‑exchange with LDCC main controller over VME backplane: receives drive‑set‑point commands, uploads real‑time process‑values, alarm‑fault‑codes and drive‑operating‑status information.
3. Eight hardware jumpers configure drive‑operating‑mode, rack‑address and signal‑channel assignment. Massive on‑board test‑point posts support commissioning waveform‑measurement and field‑fault‑isolation troubleshooting; front‑panel LED array intuitively indicates drive‑fault status.
4. EPROM stores drive‑firmware program; dual‑port shared RAM realizes high‑speed data interaction among multi‑processors.

Installation & Wiring Requirements

1. Cut off rack low‑voltage control power AND high‑voltage excitation‑drive power before installation or replacement. Non‑hot‑swappable. ESD wrist‑strap protection is mandatory during board handling.
2. Insert DS200SDCCG1AFD into target VME slot, push fully home to engage dual rear VME‑backplane connectors and lock front‑panel ejector latches. Reproduce jumper‑settings strictly consistent with original‑board hardware configuration, do not alter factory‑reserved test‑jumpers. Confirm all ribbon‑cable connectors fully mated.
3. All signal‑cable wiring must strictly follow Mark‑V / EX2000 system‑wiring drawings. Reliable protective‑earth connection for drive cabinet is mandatory.
4. After replacement: Restore rack low‑voltage control‑power only. Observe front‑panel LED power‑status and fault‑indication. Measure key signal waveforms via on‑board test‑points. Confirm normal communication with LDCC controller. Complete static‑signal‑verification test before applying high‑voltage drive‑power; validate excitation‑drive closed‑loop‑regulation performance.
5. Replacement note: Incorrect jumper‑configuration, poor VME‑backplane contact or firmware‑version mismatch will cause communication‑failure, drive‑algorithm‑abnormality, excitation‑mis‑operation or unit‑trip‑events. Full‑system communication‑function, drive‑control‑loop and protection‑logic‑verification test is mandatory before putting excitation‑drive into service.