DS3800DFXB GE

Technical Specifications

• Board Type: Digital Field Excitation and Control PCB with conformal coating.

• Field Control: Field current regulation and excitation control.

• Field Output: 1 analog output for field current reference (0-10V or 4-20mA).

• Field Feedback: 2 analog inputs for field current and voltage feedback.

• Digital Inputs: 8 optically isolated inputs (24 VDC) for control and status signals.

• Digital Outputs: 8 relay or solid-state outputs for status and alarm indication.

• Control Functions: Field weakening, field current limit, and field loss detection.

• Protection: Field overcurrent, overvoltage, and field loss detection.

• Communication: RS-232/RS-485 serial interface for external integration.

• Communication: Backplane interface to regulator board via 96-pin DIN connector.

• Status Indicators: 12 LEDs for power, field status, communication activity, and fault conditions.

• Form Factor: Standard 6U height, 160mm depth, GE 19″ rack compatible.

• Temperature Range: -10°C to +65°C operational.

• Isolation: 1500V RMS between field and logic circuits.

• Power: 5 VDC and ±15 VDC from backplane.

• MTBF: 190,000 hours.

Advantages & Key Features

• Precise Field Excitation: The GE Fanuc DS3800DFXB provides accurate field excitation for optimal motor performance.

• Field Weakening Control: Enables extended speed range operation.

• Field Loss Protection: Detects field loss conditions for safe operation.

• Integrated Protection: Field overcurrent and overvoltage detection ensure safe operation.

• Extended Temperature Range: -10°C to +65°C for demanding environments.

• Diagnostic LEDs: 12-LED indicator matrix provides comprehensive real-time status.

• Conformal Coating: Protects against dust, moisture, and chemicals.

Application Fields

• Steel & Metal Processing: Field excitation for rolling mill DC motors.

• Paper & Pulp: Field excitation for paper machine DC drives.

• Material Handling: Field excitation for crane and conveyor DC motors.

• General Industrial: Any GE DC300/DC200 drive requiring field excitation.

Comparison with Alternatives

Key Differentiator: The GE Fanuc DS3800DFXB provides comprehensive field excitation and control functions.

Selection Suggestions & Precautions

1. Field Excitation Requirements: Verify your field excitation requirements match the board’s specifications.

2. Field Wiring: Use appropriate wiring for field connections.

3. Calibration: Verify scaling and calibration for accurate field control.

4. Capacitor Aging: NOS boards stored >5 years may require capacitor inspection.

5. Test Report Required: Request verification of field excitation and protection functionality.

6. Spare Strategy: For critical applications, maintain a tested spare.

Final Recommendation

The GE Fanuc DS3800DFXB is a reliable digital field excitation and control board for GE DC300/DC200 drive systems, providing precise field excitation and protection. Prioritize suppliers with comprehensive testing capabilities. For critical applications, maintain a tested spare to minimize downtime. As GE has discontinued this series, sourcing through reputable aftermarket suppliers with refurbishment and testing capabilities is recommended.