Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Output Rails | +5 VDC / 12A (logic), ±15 VDC / 3A (each rail, adjustable ±15%), +24 VDC / 2A (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: ±0.2%; Line regulation: ±0.1%; Ripple: < 12mVpp (+5V), < 6mVpp (±15V) |
| Adjustment Range | ±15V rails adjustable ±15% (12.75V–17.25V) via onboard potentiometers |
| Monitoring | 8 analog feedback channels (voltage and current monitoring for each output + input monitoring); 8 digital fault outputs (relay, 24V/2A) for system faults and diagnostic alerts |
| Communication Interface | Ethernet/Modbus TCP with TLS encryption for secure remote monitoring; communicates with main CPU via backplane |
| Digital Interface | 8 digital inputs for external control; 12 digital outputs for status indication |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (10,000‑event buffer) |
| 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 | 12 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), SECURE COMM (green flash), LOAD SHED ACTIVE (amber) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 3 (TÜV‑certified), IEC 62443‑3‑3 (cybersecurity) |
| Efficiency | ~84% at full load |
Critical note: The DS3800NVAA1E1C is a variable voltage analog power board with adjustable ±15V outputs (±15% range), highest capacity, enhanced diagnostics, predictive analytics, secure communication, and SIL 3 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 12A, ±15V at 3A, and +24V at 2A—highest in the NVAA family.
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Widest Adjustment Range – ±15% adjustment.
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Secure Communication – Ethernet/Modbus TCP with TLS encryption; cybersecurity per IEC 62443‑3‑3.
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Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Event Logging – 10,000‑event buffer for failure analysis.
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Comprehensive Monitoring – Eight analog channels for voltage and current monitoring of all outputs plus input.
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Eight Fault Relays – Separate fault indication for system faults and diagnostic alerts.
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SIL 3 Certification – Highest functional safety level.
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Wide Temperature Range – –40°C to +75°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 3 certification makes it suitable for the most critical safety applications.
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System Integration Projects – Used when adjustable analog power, diagnostics, secure communication, and SIL 3 are required.
Competitive Comparison
| Aspect | DS3800NVAA1E1C (GE) | DS3800NVAA1D1A (GE) | Generic Adjustable Supply |
|---|---|---|---|
| Adjustment Range | ±15% | ±15% | Varies |
| +5V Output | 12A | 10A | Varies |
| ±15V Output | 3A each | 2.5A each | Varies |
| Secure Communication | Yes (TLS) | No | Varies |
| SIL Certification | SIL 3 | SIL 2 | Varies |
| Price (refurb) | ~$7,500–$11,000 | ~$5,800–$8,500 | ~$200–$800 |
Selection Guidelines & Precautions
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Application Verification – Designed for analog power distribution with adjustable outputs, diagnostics, secure communication, 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, auxiliary and communication features unavailable.
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Voltage Adjustment – Adjust ±15V rails via onboard potentiometers. Use precision voltmeter for calibration.
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Communication Configuration – Configure Ethernet/Modbus TCP with TLS parameters via backplane communication using GE Service Tool Software.
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Cybersecurity – Change default passwords, disable unused services, and configure security settings per IEC 62443‑3‑3 guidelines.
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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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SIL 3 Compliance – Follow GE safety manual GEI‑101145 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2022. Request test report verifying outputs, adjustment range, communication functions, predictive analytics, and event logging. Inspect for capacitor bulging or discoloration. Prioritize this for applications requiring maximum capacity, widest adjustment range, secure communication, and SIL 3 certification.
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