Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Output Rails | +5 VDC / 18A (main logic), ±15 VDC / 5A (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: ±0.15%; Line regulation: ±0.08%; Ripple: < 12mVpp (+5V), < 8mVpp (±15V) |
| Monitoring | 8 analog feedback channels (voltage and current monitoring for each output rail, plus input voltage and current monitoring); 6 digital fault outputs (relay, 24V/2A) for system faults |
| Digital Interface | 6 digital inputs for external control; 10 digital outputs for system status indication |
| Supervisory Control | Onboard dual‑core ARM Cortex‑M7 microcontroller for diagnostic reporting, system health monitoring, predictive failure analytics (capacitor ESR, MOSFET health), event logging (10,000‑event buffer), and programmable load shedding; communicates with main CPU via backplane |
| Operating Temperature | –40°C to +75°C |
| Form Factor | 6U × 6HP (30mm) – requires 1.5 slots |
| Backplane Connector | Standard VME 96‑pin P1 + reinforced 60‑pin P2 |
| Status LEDs | 10 indicators: +5V OK (green), +15V OK (green), –15V OK (green), SYSTEM OK (green), FAULT (red), COMM ACTIVE (white), OVERTEMP (yellow), PREDICTIVE ALERT (purple), LOAD SHED ACTIVE (orange), INPUT STATUS (blue) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 3 (TÜV‑certified) |
| Efficiency | ~87% at full load |
Critical note: The DS3800NSCC1E1D is functionally identical to the 1E1B and 1E1C. The revision letter “D” primarily reflects alternative component suppliers (e.g., different capacitor brands, MOSFET part numbers) and PCB artwork refinements to mitigate obsolescence and improve manufacturing yield. Performance specifications remain unchanged. This board is physically wider (6HP) than standard 4HP boards and requires 1.5 adjacent slots. Hot‑swapping is not supported.
Key Features & Advantages
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Same High Capacity as 1E1B/1E1C – Retains +5V at 18A and ±15V at 5A—the highest in the NSCC family.
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Same Advanced Supervisory Control – Dual‑core ARM Cortex‑M7 provides predictive analytics, event logging (10,000 events), diagnostic reporting, and programmable load shedding.
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Same Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Same SIL 3 Certification – TÜV‑certified for the highest functional safety level.
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Updated Component Selection – Uses currently available components, ensuring consistent availability and longer shelf life.
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PCB Artwork Refinements – Minor layout optimizations for improved manufacturing yield and thermal performance.
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Direct Drop‑In Replacement – Pin‑compatible with all 6HP Mark IV/V backplanes and fully interchangeable with 1E1B, 1E1C, and earlier NSCC boards.
Typical Application Cases
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Main Control Cabinets – Provides power with integrated system monitoring, diagnostics, and load shedding.
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Advanced I/O Racks – Powers racks requiring supervisory power management.
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Safety‑Related Systems – SIL 3 certification makes it suitable for the most critical safety applications.
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System Integration Projects – Used when integrated power reporting, predictive analytics, and load shedding are required.
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Upgrade from Lower NSCC Revisions – Offers the ultimate performance upgrade without changing rack configuration.
Competitive Comparison
| Aspect | DS3800NSCC1E1D (GE) | DS3800NSCC1E1C (GE) | DS3800NSCC1E1B (GE) |
|---|---|---|---|
| +5V Output | 18A | 18A | 18A |
| ±15V Output | 5A each | 5A each | 5A each |
| Predictive Analytics | Yes | Yes | Yes |
| Event Logging | 10,000 events | 10,000 events | 10,000 events |
| SIL 3 | Yes | Yes | Yes |
| Component Availability | Best | Good | Good |
| PCB Revision | Most mature | Refined | Original |
| Price (refurb) | ~$7,000–$10,000 | ~$7,000–$10,000 | ~$7,000–$10,000 |
The DS3800NSCC1E1D offers no functional advantage over the 1E1B or 1E1C but provides the most mature PCB revision and best long‑term availability due to modernized component selection.
Selection Guidelines & Precautions
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Application Verification – Designed for integrated power management with supervisory control, predictive analytics, and SIL 3.
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Physical Compatibility – 6HP wide, requires 1.5 adjacent slots.
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Backplane Compatibility – Uses P1 and P2. If backplane lacks P2, supervisory features unavailable.
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Thermal Derating – Full output to 65°C; derate to 90% at 65–70°C, 80% at 70–75°C. Do not operate above 75°C.
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Load Shedding Configuration – Program priority levels via backplane communication.
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SIL 3 Compliance – Follow GE safety manual GEI‑100962 for installation and proof‑test intervals.
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Component Differences – While the DS3800NSCC1E1D is functionally equivalent to earlier revisions, it may use different capacitor brands or MOSFET part numbers. These substitutions are GE‑approved and do not affect performance. Request the component deviation list from your supplier if verification is required.
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PCB Differences – Minor layout optimizations may affect component placement. If you are a repair facility, update your rework procedures accordingly.
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Spare Sourcing – Production ended in 2023. Request test report verifying outputs, predictive analytics, event logging, and load shedding. Inspect for capacitor bulging or discoloration. The DS3800NSCC1E1D is the most mature NSCC revision—prioritize this over 1E1B, 1E1C, or earlier revisions when available.
A-B 1794-IB16
SCHNEIDER TSX07301028
AB 800T-24JRH91KB7AX
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