Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Output Rails | +5 VDC / 10A (logic), ±15 VDC / 2.5A (each rail, adjustable ±15%), +24 VDC / 1.5A (auxiliary) |
| 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: ±0.25%; Line regulation: ±0.12%; Ripple: < 15mVpp (+5V), < 8mVpp (±15V) |
| Adjustment Range | ±15V rails adjustable ±15% (12.75V–17.25V) via onboard potentiometers |
| Monitoring | 6 analog feedback channels (voltage and current monitoring for each output); 6 digital fault outputs (relay, 24V/1.5A) for system faults and diagnostic alerts |
| Digital Interface | 6 digital inputs for external control; 8 digital outputs for status indication |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (5,000‑event buffer) |
| 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 |
| Status LEDs | 10 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), AUX OK (green), ADJUST ACTIVE (blue), OVERTEMP (yellow), DIAGNOSTIC ALERT (orange), PREDICTIVE ALERT (purple), COMM ACTIVE (white) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified) |
| Efficiency | ~82% at full load |
Critical note: The DS3800NVAA1D1A is a variable voltage analog power board with adjustable ±15V outputs (±15% range), highest capacity, enhanced diagnostics, predictive analytics, and SIL 2 certification. It 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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Adjustable Analog Outputs – ±15V rails adjustable ±15% (12.75V–17.25V) via onboard potentiometers.
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Highest Capacity – +5V at 10A, ±15V at 2.5A, and +24V at 1.5A—highest in the NVAA family.
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Widest Adjustment Range – ±15% adjustment (improved from ±12%).
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Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Event Logging – 5,000‑event buffer for failure analysis.
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Comprehensive Monitoring – Six analog channels for voltage and current monitoring of all outputs.
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Six Fault Relays – Separate fault indication for system faults and diagnostic alerts.
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SIL 2 Certification – TÜV‑certified for functional safety.
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Wide Temperature Range – –40°C to +70°C.
Typical Application Cases
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Instrumentation Cabinets – Powers precision analog circuits with adjustable voltage.
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Analog Signal Conditioning Racks – Provides adjustable power for signal conditioners.
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Calibration Equipment – Supplies adjustable analog power for calibration.
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Safety‑Related Systems – SIL 2 certification makes it suitable for safety‑critical applications.
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System Integration Projects – Used when adjustable analog power, diagnostics, and SIL 2 are required.
Competitive Comparison
| Aspect | DS3800NVAA1D1A (GE) | DS3800NVAA1C1A (GE) | Generic Adjustable Supply |
|---|---|---|---|
| Adjustment Range | ±15% | ±12% | Varies |
| +5V Output | 10A | 8A | Varies |
| ±15V Output | 2.5A each | 2A each | Varies |
| Predictive Analytics | Yes | No | No |
| SIL 2 | Yes | No | Varies |
| Price (refurb) | ~$5,800–$8,500 | ~$4,800–$7,000 | ~$200–$800 |
Selection Guidelines & Precautions
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Application Verification – Designed for analog power distribution with adjustable outputs, diagnostics, and SIL 2.
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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, auxiliary features unavailable.
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Voltage Adjustment – Adjust ±15V rails via onboard potentiometers. Use precision voltmeter for calibration.
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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.
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SIL 2 Compliance – Follow GE safety manual GEI‑101135 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. Request test report verifying outputs, adjustment range, predictive analytics, and event logging. Inspect for capacitor bulging or discoloration. Prioritize this for applications requiring maximum capacity, widest adjustment range, diagnostics, and SIL 2 certification.
A-B 1747-BA
A-B 1756-BA1
A-B 1756-BA2
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