GE DS3800DVIA1A1B

Technical Specifications

• Product Type: Digital Voltage Input Analog Board (Revision 1A1B)

• Part Number: DS3800DVIA1A1B

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Input Channels: 16 differential analog voltage inputs

• Input Range: ±10Vdc, 0-10Vdc, 0-5Vdc (jumper-selectable per channel)

• Input Impedance: > 10MΩ (differential)

• Resolution: 12-bit (approx. 4.88mV per LSB at ±10V range)

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

• Filtering: Selectable 10Hz or 100Hz low-pass filter (jumper-selectable)

• Protection: Enhanced over-voltage protection (±60V continuous); ESD protection

• Isolation: 2500Vrms reinforced opto-isolation (upgraded from 1500Vrms)

• Temperature Range: -40°C to +70°C (extended)

• MTBF: > 200,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Enhanced Over-Voltage Protection: The GE DS3800DVIA1A1B withstands ±60V continuous on any input, providing greater resilience against wiring errors and transients compared to the ±30V rating of earlier revisions.

• Selectable Filtering: Jumper-selectable 10Hz or 100Hz filtering allows optimization for both noise rejection (10Hz) and faster signal response (100Hz).

• Reinforced Isolation: Upgraded to 2500Vrms, providing better protection against ground loops and voltage transients.

• Extended Temperature Range: Rated -40°C to +70°C, suitable for outdoor or unheated turbine enclosures.

• High Channel Density: 16 channels on a single 6U board maximizes rack space efficiency.

• Precision Conditioning: Uses 0.01% resistor networks and low-drift op-amps for accurate, stable readings.

• Diagnostic LEDs: Front-panel LEDs indicate over-range, open-circuit, and fault conditions per channel.

Typical Application Cases

• Thermocouple Amplifier Outputs: Reads conditioned 0-10V signals from external thermocouple amplifiers.

• Pressure Transducer Monitoring: Reads 0-10V or 0-5V signals from pressure transmitters on lube oil, fuel gas, and hydraulic systems.

• Position Feedback: Reads ±10V signals from position transducers on actuators and valves.

• Speed Pickup Signals: Reads voltage signals from magnetic speed pickups (0-10V) for turbine speed monitoring.

• Temperature Transmitter Outputs: Reads 0-10V outputs from temperature transmitters for bearing and exhaust monitoring.

Competitive Comparison

The GE DS3800DVIA1A1B offers significant improvements over the base version in protection, filtering flexibility, and environmental tolerance. Modern PLC modules offer higher resolution and diagnostics but require protocol conversion.

Selection Guidelines & Precautions

1. Range Selection: Configure jumpers per channel to match your sensor output (±10V, 0-10V, or 0-5V). Incorrect range causes clipping or reduced resolution.

2. Filter Selection: Select 10Hz for maximum noise rejection (thermocouple, temperature); select 100Hz for faster signals (pressure transients, position feedback).

3. Input Impedance: The GE DS3800DVIA1A1B has high input impedance (>10MΩ), so it does not load the source.

4. Wiring: Use shielded twisted-pair cables. Ground shield at board end only to prevent ground loops.

5. Over-Voltage: While the GE DS3800DVIA1A1B withstands ±60V, prolonged exposure may degrade accuracy. Verify wiring before power-up.

6. Commissioning: Use a precision voltage source to verify each channel’s reading. Calibrate using onboard trimmers if necessary.

7. ESD Handling: Use ESD-safe practices.

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

   • All 16 channels tested for accuracy (±0.1%)

   • Range verification (±10V, 0-10V, 0-5V)

   • Filter verification (10Hz and 100Hz)

   • Over-voltage protection test (±60V)

   • Isolation test (2500Vrms)

9. Spare Strategy: Keep one spare GE DS3800DVIA1A1B on-site. For critical measurements, consider redundant analog inputs using two boards.