GE DS3800DMEC

Technical Specifications

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

• Excitation Control: Field current regulation and excitation control.

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

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

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

• Signal Conditioning: Buffering, amplification, and isolation for all signals.

• Protection: Overvoltage, overcurrent, short-circuit, thermal protection, 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: 14 LEDs for power, excitation status, control status, communication, 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: 195,000 hours.

Advantages & Key Features

• Advanced Motor Excitation Control: The GE Fanuc DS3800DMEC provides precise motor excitation with advanced control features.

• Field Weakening Control: Enables extended speed range operation.

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

• Comprehensive Protection: Overvoltage, overcurrent, short-circuit, and thermal protection.

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

• Diagnostic LEDs: 14-LED indicator matrix provides comprehensive real-time status.

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

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

Application Fields

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

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

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

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

Comparison with Alternatives

Key Differentiator: The GE Fanuc DS3800DMEC offers advanced excitation control with field weakening and field loss detection.

Selection Suggestions & Precautions

1. Excitation Requirements: Verify your motor excitation and control requirements match the board’s specifications.

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

3. Serial Communication: Configure communication settings for external integration.

4. Calibration: Verify scaling and calibration for accurate excitation control.

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

6. Test Report Required: Request verification of excitation, protection, and communication functionality.

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

Final Recommendation

The GE Fanuc DS3800DMEC is an advanced digital motor excitation and control board for GE DC300/DC200 drive systems, providing comprehensive excitation control with field weakening and protection features. 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.