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 (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: < 25 ppm/°C |
| Ripple | < 3mVpp (+5V), < 2mVpp (±15V) |
| Temperature Compensation | Active dual‑zone temperature compensation with heatsink‑mounted sensor and precision reference ICs for superior thermal tracking |
| Communication Interface | RS‑485/Modbus and Ethernet/Modbus TCP with TLS encryption for secure 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 | 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 and diagnostic alerts |
| Digital Interface | 6 digital inputs for external control; 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 |
| Status LEDs | 10 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), COMM ACTIVE (white), DIAGNOSTIC ALERT (orange), OVERTEMP (yellow), PREDICTIVE ALERT (purple), SECURE COMM (green flash), LOAD SHED ACTIVE (amber) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified), IEC 62443‑3‑3 (cybersecurity) |
| Efficiency | ~82% at full load |
Critical note: The DS3800NTCF1C1C is functionally identical to the 1C1B. The revision letter “C” primarily reflects alternative component suppliers (e.g., different capacitor brands, MOSFET part numbers) to mitigate obsolescence. Performance specifications remain unchanged. This board 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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Same High Capacity as 1C1B – Retains +5V at 10A and ±15V at 2.5A.
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Same Ultra‑Low Temperature Drift – < 25 ppm/°C with dual‑zone compensation.
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Same Secure Communication – RS‑485/Modbus and Ethernet/Modbus TCP with TLS; cybersecurity per IEC 62443‑3‑3.
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Same Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Same Event Logging – 5,000‑event buffer for failure analysis.
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Same SIL 2 Certification – TÜV‑certified for functional safety.
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Updated Component Selection – Uses currently available components, ensuring consistent availability and longer shelf life.
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Direct Drop‑In Replacement – Pin‑compatible with all 6HP Mark IV/V backplanes and fully interchangeable with 1C1B and earlier NTCF boards.
Typical Application Cases
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Critical Instrumentation Cabinets – Powers precision instruments requiring temperature stability, diagnostics, and secure 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 secure communication and diagnostic reporting are required.
Competitive Comparison
| Aspect | DS3800NTCF1C1C (GE) | DS3800NTCF1C1B (GE) | DS3800NTCF1B1B (GE) |
|---|---|---|---|
| +5V Output | 10A | 10A | 8A |
| ±15V Output | 2.5A each | 2.5A each | 2A each |
| Temperature Coefficient | < 25 ppm/°C | < 25 ppm/°C | < 30 ppm/°C |
| Cybersecurity | Yes | Yes | No |
| Component Availability | Best | Good | Good |
| Price (refurb) | ~$6,500–$9,500 | ~$6,500–$9,500 | ~$5,500–$8,000 |
The DS3800NTCF1C1C offers no functional advantage over the 1C1B but provides better long‑term availability due to modernized component selection.
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with secure 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 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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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‑101085 for installation and proof‑test intervals.
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Component Differences – While the DS3800NTCF1C1C is functionally equivalent to the 1C1B, it may use different capacitor brands or MOSFET part numbers. These substitutions are GE‑approved and do not affect performance. Request the component deviation list from your supplier if verification is required.
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Spare Sourcing – Production ended in 2022. Request test report verifying outputs, communication functions, diagnostic functions, predictive analytics, and temperature stability. Inspect for capacitor bulging or discoloration. The DS3800NTCF1C1C is the preferred revision for new spares—prioritize this over 1C1B or earlier revisions when available.
SIEMENS 5SY52407CC
AUTOMATION DIRECT PD1-AP-1F
A-B 1734EP24DC
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