Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Input Redundancy | Dual independent inputs with automatic failover (< 5ms) and jumper‑configurable priority |
| Output Rails | +5 VDC / 10A (precision logic), ±15 VDC / 2.5A (each rail, precision 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: ±0.02%; Line regulation: ±0.008%; Temperature coefficient: < 30 ppm/°C |
| Ripple | < 3mVpp (+5V), < 2mVpp (±15V) |
| Temperature Compensation | Active dual‑zone temperature compensation with heatsink‑mounted sensor for improved thermal tracking |
| Redundancy Features | Automatic failover (< 5ms), input priority selection, input status monitoring, failover event logging |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (5,000‑event buffer) |
| Monitoring | 8 analog feedback channels (voltage and current monitoring for outputs + input monitoring + temperature monitoring); 6 digital fault outputs (relay, 24V/1.5A) for system faults, input failover, and diagnostic alerts |
| Digital Interface | 6 digital inputs for external control and priority override; 8 digital outputs for status indication |
| 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 (for second input) |
| Status LEDs | 10 indicators: INPUT 1 OK (green), INPUT 2 OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), COMM ACTIVE (white), DIAGNOSTIC ALERT (orange), OVERTEMP (yellow), PREDICTIVE ALERT (purple), FAILOVER ACTIVE (amber) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified) |
| Efficiency | ~82% at full load |
Critical note: The DS3800NTRF1F1E is a redundant temperature‑compensated power board with enhanced diagnostics 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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Dual Input Redundancy – Automatic failover (< 5ms) with jumper‑configurable priority for maximum availability.
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Ultra‑Low Temperature Drift – < 30 ppm/°C with dual‑zone compensation.
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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 and failover events.
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Comprehensive Monitoring – Eight analog channels for outputs, inputs, and temperature.
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Six Fault Relays – Separate fault indication for system faults, input failover, 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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Critical Instrumentation Cabinets – Powers precision instruments requiring both power continuity and temperature stability.
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Calibration Laboratories – Supplies power to calibration equipment with redundant inputs.
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High‑Precision Measurement Systems – Powers vibration analysis and other critical measurement systems.
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Safety‑Related Systems – SIL 2 certification makes it suitable for safety‑critical applications.
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Offshore Platforms – Dual input capability supports connection to two independent power sources.
Competitive Comparison
| Aspect | DS3800NTRF1F1E (GE) | DS3800NTCF1C1C (GE) | DS3800NRTB (GE) |
|---|---|---|---|
| Input Redundancy | Yes | No | Yes |
| +5V Output | 10A | 10A | 8A |
| ±15V Output | 2.5A each | 2.5A each | 2A each |
| Temperature Coefficient | < 30 ppm/°C | < 25 ppm/°C | < 30 ppm/°C |
| Predictive Analytics | Yes | Yes | No |
| SIL 2 | Yes | Yes | No |
| Price (refurb) | ~$6,800–$10,000 | ~$6,500–$9,500 | ~$4,800–$6,800 |
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation requiring input redundancy, temperature stability, 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 for second input. If backplane lacks P2, redundancy features unavailable.
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Input Priority Configuration – Configure primary/secondary priority via onboard jumpers (JP1‑JP2).
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Temperature Compensation – Requires 30‑minute warm‑up to achieve specified temperature coefficient.
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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‑101105 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. Request test report verifying outputs, failover functionality, diagnostic functions, predictive analytics, and temperature stability. Inspect for capacitor bulging or discoloration. Prioritize this for applications requiring both input redundancy and precision temperature compensation.
AB 1756-BA2
A-B 1756-TBNH
A-B 1746-N2
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