GE DS3800NRRA1G1F

¥999.00

The DS3800NRRA1G1F is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model belongs to the “NRRA” family—a redundant rack power interface designed for high‑availability power distribution to entire I/O racks or sub‑racks within the Mark IV/V system. The “1G1F” suffix indicates a high‑performance revision within the NRRA family, offering increased output capacity, enhanced monitoring, improved diagnostics, and advanced intelligent control compared to the baseline NRRA. The DS3800NRRA1G1F provides redundant, conditioned power to auxiliary I/O racks, satellite cabinets, or expansion chassis that require independent power redundancy. It incorporates dual input power feeds, automatic failover (< 5ms), individual output protection (adjustable per output), advanced fault detection, predictive failure analytics (capacitor ESR and MOSFET health monitoring), event logging (5,000‑event buffer), and comprehensive diagnostic reporting to ensure uninterrupted operation of I/O racks in critical turbine control applications. This board is typically installed in auxiliary I/O cabinets or satellite racks within the Mark IV/V ecosystem.

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Description

Technical Parameters

Parameter Specification
Input Voltage 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter
Input Redundancy Dual independent inputs with automatic failover (< 5ms) and jumper‑configurable priority
Output Rails +5 VDC / 18A (logic power), ±15 VDC / 4A (each rail, analog circuits)
Isolation Full isolation (1.5kV input‑to‑output, 2.0kV output‑to‑ground)
Protection Overcurrent protection (adjustable per output via jumpers), short‑circuit protection, transient suppression (6kV surge), reverse polarity protection, input undervoltage lockout
Regulation Load regulation: ±0.2%; Line regulation: ±0.1%; Ripple: < 15mVpp (+5V), < 10mVpp (±15V)
Monitoring 6 analog feedback channels (voltage and current monitoring for each output rail, plus input voltage and current); 4 digital fault outputs (relay, 24V/1.5A) for output faults, input failover, overtemp, and system health
Digital Interface 4 digital inputs for external enable/disable and status override; 6 digital outputs for system status indication and external alarm signaling
Intelligent Control Onboard ARM Cortex‑M7 microcontroller for redundancy management, diagnostic reporting, predictive failure analytics (capacitor ESR, MOSFET health), and event logging (5,000‑event buffer); communicates with main CPU via backplane
Operating Temperature –40°C to +70°C
Form Factor 6U × 6HP (30mm) – requires 1.5 slots
Backplane Connector Standard VME 96‑pin P1 + reinforced 60‑pin P2 (for second input and high‑current outputs)
Status LEDs 10 indicators: INPUT 1 OK (green), INPUT 2 OK (green), +5V OK (green), +15V OK (green), –15V OK (green), FAULT (red), OVERTEMP (yellow), FAILOVER ACTIVE (amber), COMM ACTIVE (white), PREDICTIVE ALERT (purple)
Certifications CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified)
Efficiency ~86% at full load

Critical note: The DS3800NRRA1G1F is a redundant rack power interface designed for auxiliary I/O racks and satellite cabinets. It offers the highest capacity, advanced intelligent control, predictive analytics, event logging, and SIL 2 certification in the NRRA family. This board is physically wider (6HP) than standard 4HP boards and requires 1.5 adjacent slots. Hot‑swapping is not supported.

Key Features & Advantages

  • Highest Capacity in NRRA Family – The DS3800NRRA1G1F offers +5V at 18A (50% more than baseline NRRA) and ±15V at 4A (100% more), making it suitable for the most demanding auxiliary racks.

  • Advanced Intelligent Control – Onboard ARM Cortex‑M7 supports predictive failure analytics (capacitor ESR and MOSFET health monitoring), event logging (5,000 events), and diagnostic reporting via backplane communication.

  • Predictive Failure Analytics – The board continuously monitors capacitor ESR and MOSFET health, providing advanced warning (purple PREDICTIVE ALERT LED) before component failure occurs, enabling condition‑based maintenance.

  • Event Logging – The onboard 5,000‑event buffer stores power events (input transients, output deviations, load changes, temperature excursions, capacitor wear trends) with microsecond timestamps, enabling detailed failure analysis.

  • Comprehensive Monitoring – Six analog feedback channels provide voltage and current telemetry for all output rails plus input monitoring, enabling detailed remote monitoring.

  • Four Fault Relays – Four form‑C relay contacts (24V/1.5A) provide separate fault indication for each output rail, input failover, overtemp, and system health.

  • Enhanced Digital I/O – Four digital inputs for external control; six digital outputs for system status indication.

  • IEC 61508 SIL 2 Certification – TÜV‑certified for functional safety, suitable for safety‑related auxiliary rack applications.

  • Wide Temperature Range – Extended –40°C to +70°C range makes the DS3800NRRA1G1F suitable for demanding environments.

Typical Application Cases

  • Redundant I/O Racks – Provides redundant power to auxiliary I/O racks with high capacity requirements.

  • Satellite Cabinets – Powers remote I/O cabinets located near field devices.

  • Expansion Chassis – Supplies power to expansion racks added to existing Mark IV/V systems.

  • Safety‑Related Systems – SIL 2 certification makes it suitable for safety‑related auxiliary applications.

  • Upgrade from Baseline NRRA – Offers a significant performance upgrade without changing rack configuration.

Competitive Comparison

Aspect DS3800NRRA1G1F (GE) DS3800NRRA (baseline) DS3800NPSR1B1B (GE)
+5V Output 18A 12A 15A
±15V Output 4A each 2A each 3A each
Predictive Analytics Yes No No
Event Logging 5,000 events No No
Monitoring Channels 6 (V + I) 4 (V + I) 4 (V + I)
SIL 2 Yes No No
Price (refurb) ~$5,000–$7,500 ~$3,800–$5,500 ~$4,500–$6,500

The DS3800NRRA1G1F is the flagship redundant rack power interface in the DS3800 family, offering the highest capacity, advanced intelligent control, predictive analytics, and SIL 2 certification for auxiliary rack applications.

Selection Guidelines & Precautions

  1. Application Verification – Designed for redundant I/O rack power with high capacity and advanced monitoring. If advanced features are not required, lower‑cost options may suffice.

  2. Physical Compatibility – 6HP wide, requires 1.5 adjacent slots. Will not fit in 4HP slots.

  3. Backplane Compatibility – Uses P1 and reinforced P2. If backplane lacks P2, advanced features unavailable.

  4. Power Budget – Do not exceed: +5V/18A, ±15V/4A each.

  5. Protection Thresholds – Adjust via onboard jumpers (JP1–JP3) based on load requirements.

  6. Predictive Analytics – Access health data via backplane communication; purple LED warns before failure.

  7. Event Log Retrieval – Access via backplane or Ethernet port; 5,000 events can be exported in CSV.

  8. SIL 2 Compliance – Follow GE safety manual GEI‑100938 for installation and proof‑test intervals.

  9. Thermal Derating – Full output to 60°C; derate to 90% at 60–65°C, 80% at 65–70°C. Do not operate above 70°C.

  10. Spare Sourcing – Production ended in 2022. Request test report for all outputs at 25°C, 55°C, 65°C, plus failover, predictive analytics, event logging, and digital I/O. Inspect for capacitor bulging or discoloration.

SCHNEIDER LC1D258
ABB 3HAB2038-1
A-B 1485P-RDR5

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