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 |
| 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 | 6 digital inputs for external control; 8 digital outputs for status indication |
| Communication Interface | RS‑485/Modbus 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 | 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 DS3800NVIA1C1D is a variable voltage industrial analog power board with adjustable ±15V outputs (±15% range), highest capacity, enhanced diagnostics, predictive analytics, communication, 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 NVIA 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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Communication Interface – RS‑485/Modbus for external device communication.
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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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Industrial Control Equipment – Supplies adjustable analog power for industrial applications.
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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 | DS3800NVIA1C1D (GE) | DS3800NVIA1B1B (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) | ~$6,500–$9,500 | ~$4,800–$7,000 | ~$200–$800 |
Selection Guidelines & Precautions
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Application Verification – Designed for industrial analog power distribution with adjustable outputs, diagnostics, communication, 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 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 RS‑485/Modbus parameters via backplane communication using GE Service Tool Software.
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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‑101175 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. 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, widest adjustment range, diagnostics, and SIL 2 certification.
A-B 1756-BA2
A-B 1756-TBCH
A-B 1756-TBNH
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