Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 90–160 VDC); 24 VDC compatible with external adapter |
| Output Rails | +5 VDC / 8A (precision logic), ±15 VDC / 2A (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: ±0.03%; Line regulation: ±0.01%; 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 |
| Communication Interface | RS‑485/Modbus and Ethernet/Modbus TCP for external device communication; communicates with main CPU via backplane |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (5,000‑event buffer) |
| Monitoring | 6 analog feedback channels (voltage and current monitoring for outputs + input monitoring); 4 digital fault outputs (relay, 24V/1A) for system faults and diagnostic alerts |
| Digital Interface | 4 digital inputs for external control; 6 digital outputs for status indication |
| Operating Temperature | –30°C to +65°C |
| Form Factor | 6U × 6HP (30mm) – requires 1.5 slots |
| Backplane Connector | Standard VME 96‑pin P1 + reinforced 60‑pin P2 |
| Status LEDs | 8 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), COMM ACTIVE (white), DIAGNOSTIC ALERT (orange), OVERTEMP (yellow), PREDICTIVE ALERT (purple) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified) |
| Efficiency | ~80% at full load |
Critical note: The DS3800NTCF1B1B is a temperature‑compensated power board with communications, 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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Higher Capacity – +5V at 8A and ±15V at 2A—higher than baseline NTCF (6A, 1.5A).
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Ultra‑Low Temperature Drift – < 30 ppm/°C with dual‑zone compensation.
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Dual Communication Interfaces – RS‑485/Modbus and Ethernet/Modbus TCP.
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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 outputs and input status.
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Four 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 – –30°C to +65°C.
Typical Application Cases
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Critical Instrumentation Cabinets – Powers precision instruments requiring temperature stability, diagnostics, and communication.
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Calibration Laboratories – Supplies power to calibration equipment with diagnostic monitoring.
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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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System Integration Projects – Used when communication and diagnostic reporting are required.
Competitive Comparison
| Aspect | DS3800NTCF1B1B (GE) | DS3800NTCF1A1A (GE) | DS3800NPTA1E1B (GE) |
|---|---|---|---|
| +5V Output | 8A | 6A | 8A |
| ±15V Output | 2A each | 1.5A each | 2A each |
| Temperature Coefficient | < 30 ppm/°C | < 50 ppm/°C | < 30 ppm/°C |
| Communication | RS‑485 + Ethernet | RS‑485 only | No |
| Predictive Analytics | Yes | No | No |
| SIL 2 | Yes | No | No |
| Price (refurb) | ~$5,500–$8,000 | ~$4,200–$6,000 | ~$3,800–$5,200 |
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with communication, 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, communication features unavailable.
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Communication Configuration – Configure RS‑485/Modbus and Ethernet/Modbus TCP parameters via backplane communication using GE Service Tool Software.
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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 55°C; derate to 90% at 55–60°C, 80% at 60–65°C. Do not operate above 65°C.
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SIL 2 Compliance – Follow GE safety manual GEI‑101085 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. Request test report verifying outputs, communication functions, diagnostic functions, predictive analytics, and temperature stability. Inspect for capacitor bulging or discoloration. Prioritize this over baseline NTCF for applications requiring higher capacity and enhanced diagnostics.
EBMPAPST A5E01052493AE
A-B 1756-BA1
A-B 42CF-D1LPA1-D4
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