Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Output Rails | Main Output: 5–24 VDC / 10A (adjustable), +5 VDC / 4A (logic), ±15 VDC / 1.5A (each rail, analog) |
| 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 (main), < 10mVpp (±15V) |
| Adjustment Range | Main output adjustable 5–24 VDC via onboard potentiometer |
| Monitoring | 8 analog feedback channels (voltage and current monitoring for main output, +5V, ±15V, and input); 8 digital fault outputs (relay, 24V/2A) for system faults and diagnostic alerts |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (5,000‑event buffer) |
| Digital Interface | 8 digital inputs for external control; 10 digital outputs for status indication |
| Communication Interface | RS‑485/Modbus and Ethernet/Modbus TCP for external device communication; 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 |
| Status LEDs | 12 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), ADJUST ACTIVE (blue), AUX OK (green), DIAGNOSTIC ALERT (orange), OVERTEMP (yellow), 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 | ~82% at full load |
Critical note: The DS3800NVCD1B1B is a variable voltage converter board with diagnostics, predictive analytics, secure communication, and SIL 3 certification, offering highest capacity and advanced features. 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 Main Output – 5–24 VDC adjustable via onboard potentiometer.
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Highest Capacity – Main output at 10A, +5V at 4A, and ±15V at 1.5A—highest in the NVCD family.
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Secure Communication – RS‑485/Modbus and 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 – 5,000‑event buffer for failure analysis.
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Diagnostic Engine – Onboard diagnostics for power supply health monitoring.
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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 +70°C.
Typical Application Cases
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Auxiliary Control Cabinets – Provides flexible voltage conversion with diagnostics.
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Test Equipment – Supplies adjustable voltage with health monitoring.
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Field Device Power Distribution – Powers devices with varying voltage requirements.
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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 voltage, diagnostics, secure communication, and SIL 3 are required.
Competitive Comparison
| Aspect | DS3800NVCD1B1B (GE) | DS3800NVCD1A1B (GE) | Generic Adjustable Supply |
|---|---|---|---|
| Main Output | 5–24V / 10A | 5–24V / 8A | Varies |
| Communication | RS‑485 + Ethernet | RS‑485 only | Varies |
| SIL Certification | SIL 3 | SIL 2 | Varies |
| Price (refurb) | ~$7,500–$11,000 | ~$5,500–$8,000 | ~$200–$800 |
Selection Guidelines & Precautions
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Application Verification – Designed for flexible voltage conversion with adjustable output, 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 main output via onboard potentiometer. Use precision voltmeter for calibration.
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Communication Configuration – Configure RS‑485/Modbus and 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 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 3 Compliance – Follow GE safety manual GEI‑101165 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2022. Request test report verifying outputs, adjustment range, diagnostic functions, predictive analytics, and communication. Inspect for capacitor bulging or discoloration. Prioritize this for applications requiring maximum capacity, secure communication, and SIL 3 certification.
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