GE DS3800HDDA1A1A

Technical Specifications

• Product Type: High-Density Digital Analog Board (Revision 1A1A)

• Part Number: DS3800HDDA1A1A

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Input Channels: 32 differential analog inputs – highest density in Mark IV

• Input Type: Voltage (±10V, 0-10V, or 0-5V) (jumper-selectable per channel)

• Input Impedance: > 10MΩ

• Resolution: 12-bit

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

• Protection: Over-voltage protection (±30V) per input

• Isolation: 1500Vrms opto-isolation (field-to-logic)

• Temperature Range: 0°C to +60°C

• MTBF: > 150,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Highest Channel Density: The GE DS3800HDDA1A1A provides 32 analog inputs on a single 6U board, doubling the density of standard boards like the DS3800DVIA.

• Flexible Input Configuration: Jumper-selectable voltage ranges per channel.

• Space-Saving Design: Reduces rack space requirements in large Mark IV systems.

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

• Diagnostic LEDs: Front-panel LEDs indicate input status and fault conditions.

Typical Application Cases

• Large-Scale Monitoring: Monitors multiple temperature, pressure, and flow signals in large turbine systems.

• Space-Constrained Installations: Maximizes I/O density where rack space is limited.

• Retrofit Projects: Replaces multiple lower-density boards with a single GE DS3800HDDA1A1A.

Competitive Comparison

The GE DS3800HDDA1A1A is functionally identical to the base DS3800HDDA and offers the highest analog input density in the Mark IV family.

Selection Guidelines & Precautions

1. Input Range Selection: Configure jumpers per channel for ±10V, 0-10V, or 0-5V.

2. Channel Count: Ensure total channels do not exceed 32.

3. Wiring: Use shielded twisted-pair cables; ground shield at board end only.

4. ESD Handling: Use ESD-safe practices.

5. Sourcing: Obsolete. Request functional test report including all 32 channels tested for accuracy and protection.

6. Spare Strategy: Keep one spare GE DS3800HDDA1A1A on-site for critical high-density applications. If higher isolation or extended temperature range is required, consider later revisions.