DS3800HAIC1A1A GE

Technical Specifications

• Product Type: High-Amplitude Isolated Current Output Board (Revision 1A1A)

• Part Number: DS3800HAIC1A1A

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Output Channels: 4 independent isolated current outputs

• Output Type: 4-20mA or 0-20mA (jumper-selectable), loop-powered

• Drive Capability: Up to 80mA per channel (sourcing or sinking)

• Loop Power: Internal 24Vdc isolated loop power per channel (galvanically isolated)

• Compliance Voltage: 24Vdc (allows driving loads up to 600Ω at 20mA)

• Isolation Voltage: 1500Vrms isolation per channel (channel-to-channel and channel-to-logic)

• Resolution: 12-bit

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

• Protection: Over-current, short-circuit, and reverse-polarity protection per channel

• Diagnostics: Individual channel fault detection (open-loop, short-circuit) with LED indication

• Temperature Range: 0°C to +60°C

• Heat Dissipation: Integrated heatsink for high-power operation

• MTBF: > 160,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Per-Channel Galvanic Isolation: The GE DS3800HAIC1A1A provides individual 1500Vrms isolation for each output channel, eliminating ground loops and protecting logic from field-side faults.

• High Drive Capability: Delivers up to 80mA per channel, suitable for driving multiple devices in parallel or long cable runs.

• Loop-Powered Outputs: Integrated 24Vdc loop power per channel eliminates external power supplies.

• Comprehensive Protection: Over-current, short-circuit, and reverse-polarity protection safeguards the board and field devices.

• Diagnostic LEDs: Front-panel LEDs indicate output status and fault conditions per channel.

• Proven Reliability: Initial revision with long field track record.

Typical Application Cases

• Explosive Atmospheres (Ex/ATEX): Provides galvanic isolation suitable for driving devices in hazardous areas when used with appropriate external barriers.

• Long-Distance Signal Transmission: Drives 4-20mA signals over distances up to 1200m with complete isolation.

• I/P (Current-to-Pressure) Converters: Drives I/P converters for pneumatic valve actuators with full isolation.

• Valve Positioners: Provides 4-20mA control signals for smart and analog positioners.

• Remote I/O Powering: Supplies isolated loop power and control signals to remote transmitters and actuators.

Competitive Comparison

The GE DS3800HAIC1A1A is functionally identical to the base DS3800HAIC, providing a cost-effective isolated current output solution with proven reliability.

Selection Guidelines & Precautions

1. Isolation Requirements: Provides 1500Vrms per channel. For higher isolation (2500Vrms) or extended temperature range, consider the DS3800HAIA series.

2. Loop Configuration: Verify sourcing or sinking mode. Set jumpers accordingly.

3. Load Resistance: Calculate total loop resistance. Drives up to 600Ω at 20mA. Exceeding this causes saturation.

4. Loop Power: Each channel has isolated loop power. Ensure field devices do not have their own power supply.

5. Cable Length: Supports cables up to 1200m. For longer runs, reduce load or use a repeater.

6. Short-Circuit Protection: Protected, but repeated shorting may affect reliability.

7. Commissioning: Use a precision current meter to verify each channel. Calibrate using onboard trimmers if necessary.

8. Wiring: Use shielded twisted-pair cables; ground shield at board end only. Do not connect shield to isolated output circuit.

9. ESD Handling: Use ESD-safe practices.

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

    • All 4 channels tested at 4mA and 20mA

    • Load regulation test (up to 600Ω)

    • Loop power verification (24V per channel)

    • Isolation test (1500Vrms per channel, channel-to-channel)

    • Sourcing/sinking mode verification

    • Protection validation

11. Spare Strategy: Keep one spare GE DS3800HAIC1A1A on-site for critical isolated 4-20mA control applications. If you require higher isolation or temperature range, consider the DS3800HAIA series instead.