GE DS3800HDPA1A1A

Technical Specifications

• Product Type: High-Density Pulse Amplifier Board (Revision 1A1A)

• Part Number: DS3800HDPA1A1A

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Input Channels: 16 pulse inputs

• Output Channels: 16 amplified pulse outputs

• Input Type: Differential or single-ended (jumper-selectable per channel)

• Input Voltage: 5Vdc, 12Vdc, or 24Vdc (jumper-selectable)

• Output Voltage: 5Vdc, 12Vdc, or 24Vdc (jumper-selectable per channel)

• Output Current: Up to 100mA per channel

• Maximum Input Frequency: 1MHz

• Maximum Output Frequency: 1MHz

• Gain: Fixed gain (1x) or selectable gain (1x, 2x) via jumpers

• Propagation Delay: < 100ns

• Protection: Over-voltage and short-circuit 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 DS3800HDPA1A1A provides 16 pulse channels on a single 6U board, maximizing rack space efficiency.

• Flexible Input/Output Configuration: Jumper-selectable input/output voltages and input types.

• Selectable Gain: 1x or 2x gain for signal amplification.

• High-Frequency Support: Up to 1MHz for speed and position applications.

• Low Propagation Delay: < 100ns for precise timing.

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

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

Typical Application Cases

• Speed Pickup Amplification: Amplifies signals from magnetic or optical speed pickups.

• Proximity Probe Conditioning: Conditions proximity probe signals for position monitoring.

• Tachometer Signal Driving: Drives amplified tachometer signals to control systems.

• Pulse Distribution: Distributes amplified pulse signals to multiple destinations.

Competitive Comparison

The GE DS3800HDPA1A1A is functionally identical to the base DS3800HDPA but with reduced gain options (1x/2x vs. 1x/2x/5x).

Selection Guidelines & Precautions

1. Input Type Selection: Configure differential or single-ended per channel to match your sensor.

2. Voltage Selection: Set input and output voltages (5V, 12V, or 24V) to match your field devices.

3. Gain Selection: Set gain (1x or 2x) for appropriate signal amplification.

4. Frequency Verification: Ensure input frequency does not exceed 1MHz.

5. Wiring: Use shielded twisted-pair cables for pulse signals; ground shield at board end only.

6. ESD Handling: Use ESD-safe practices.

7. Sourcing: Obsolete. Request functional test report including all 16 channels tested at max frequency.

8. Spare Strategy: Keep one spare GE DS3800HDPA1A1A on-site for critical pulse applications. If 5x gain is required, consider the base DS3800HDPA instead.