DS3800HDDB GE

Technical Specifications

• Product Type: High-Density Digital Buffer Board

• Part Number: DS3800HDDB

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

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

• Output Channels: 32 buffered differential analog outputs

• Input Type: Voltage (±10V) or current (4-20mA) (jumper-selectable per channel)

• Input Impedance: > 10MΩ (voltage mode); 250Ω (current mode)

• Output Impedance: < 10Ω (voltage mode); > 1MΩ (current mode)

• Buffer Gain: Unity gain (1:1)

• Bandwidth: DC to 50kHz

• Protection: Over-voltage and over-current protection per channel

• Isolation: 1500Vrms opto-isolation (input-to-output)

• Temperature Range: 0°C to +60°C

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

Key Features & Advantages

• High Channel Density: The GE DS3800HDDB provides 32 buffered channels on a single 6U board, maximizing rack space efficiency.

• Signal Integrity Preservation: High-input-impedance buffering prevents signal degradation.

• Multiple Output Distribution: Buffers and distributes analog signals to multiple destinations.

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

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

Typical Application Cases

• High-Density Signal Distribution: Buffers and distributes 32 analog signals to multiple ADCs or monitoring devices.

• Long-Distance Transmission: Drives analog signals over long cable runs.

• Impedance Matching: Provides proper impedance matching for analog signal distribution.

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

Competitive Comparison

The GE DS3800HDDB offers the highest channel density among Mark IV buffer boards.

Selection Guidelines & Precautions

1. Gain: Unity gain only. For signal scaling, use external amplifiers or consider the DS3800HCMB with selectable gain.

2. Input Type: Configure jumpers per channel for voltage or current.

3. Cable Length: Supports cables up to 500m. For longer runs, use additional line drivers.

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

5. ESD Handling: Use ESD-safe practices.

6. Sourcing: Obsolete. Request functional test report including all 32 channels tested.

7. Spare Strategy: Keep one spare GE DS3800HDDB on-site for critical high-density signal distribution.