DS3800HA1C GE

Technical Specifications

• Product Type: High-Amplitude Analog Output Board

• Part Number: DS3800HA1C

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Output Channels: 4 independent analog output channels

• Output Type: 0-10Vdc, 0-20mA, 4-20mA, or ±10Vdc (jumper-selectable)

• Drive Capability: Up to 2A per channel (voltage mode); up to 50mA (current mode)

• Resolution: 12-bit

• Accuracy: ±0.1% of full scale at 25°C; ±0.02% per °C drift

• Protection: Over-current, short-circuit, and thermal shutdown protection per channel

• Isolation: 1500Vrms opto-isolation between logic and output sections

• Heat Dissipation: Integrated heatsink for high-power operation

• Temperature Range: 0°C to +60°C

• MTBF: > 100,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• High Drive Capability: The GE DS3800HA1C delivers up to 2A per channel, making it suitable for direct driving of high-power field devices without external amplifiers.

• Multiple Output Modes: Jumper-selectable voltage (0-10V, ±10V) or current (0-20mA, 4-20mA) outputs provide flexibility for various field devices.

• Integrated Protection: Over-current, short-circuit, and thermal shutdown protect both the board and connected field devices from damage.

• Thermal Management: Built-in heatsink allows sustained high-power operation without derating.

• Diagnostic LEDs: Front-panel LEDs indicate output status, current limit activation, and thermal warning per channel.

• 12-Bit Resolution: Provides accurate, fine-grained control for precision applications.

Typical Application Cases

• Proportional Solenoid Control: The GE DS3800HA1C drives proportional solenoids used in hydraulic valve positioning.

• Motor-Operated Valve (MOV) Control: Provides control signals for MOV actuators requiring 4-20mA or 0-10V inputs.

• Hydraulic Actuator Control: Drives high-power hydraulic actuators that require > 50mA input current.

• Fuel Control Actuators: In some installations, the GE DS3800HA1C replaces servo driver boards for fuel valve control.

• Excitation Systems: Provides control outputs for generator excitation systems requiring high-current analog signals.

Competitive Comparison

The GE DS3800HA1C offers the highest output current capability of any Mark IV analog output board, making it essential for direct high-power actuation.

Selection Guidelines & Precautions

1. Output Mode Selection: Configure jumpers to match your field device input requirements (voltage or current). Incorrect mode selection may damage the device or the GE DS3800HA1C.

2. Load Verification: Confirm the field device’s input impedance and current requirements. The GE DS3800HA1C can drive up to 2A in voltage mode; ensure your load does not exceed this.

3. Thermal Management: The GE DS3800HA1C dissipates significant heat at high output currents. Ensure cabinet airflow is adequate (minimum 100 CFM across the board).

4. Power Supply Capacity: The GE DS3800HA1C draws significant power from the backplane. Verify your Mark IV power supply can handle the additional load.

5. Short-Circuit Protection: While protected, repeated shorting may reduce output capability over time.

6. Wiring: Use shielded cables for analog outputs, especially for long cable runs (> 50m).

7. Commissioning: Start with reduced output and gradually increase to verify correct operation before full power application.

8. ESD Handling: Use ESD-safe practices.

9. Sourcing: Obsolete. Request functional test report including:

   • All 4 channels tested in all output modes

   • Load regulation test (2A capability)

   • Short-circuit and thermal protection validation

   • Accuracy test (±0.1%)

10. Spare Strategy: Keep one spare GE DS3800HA1C on-site if you rely on it for critical high-power control functions.