GE DS3800HCMC1A1A

Technical Specifications

• Product Type: High-Current Multiplexer Controller Board (Revision 1A1A)

• Part Number: DS3800HCMC1A1A

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Control Channels: Up to 64 multiplexer channels (expandable)

• Scan Control: Sequential or skip (jumper-selectable)

• Scan Speed: Fixed 100 or 200 channels per second (jumper-selectable)

• Synchronization: External trigger input for synchronized scanning

• Output: Channel address and control signals to multiplexer boards

• Protection: Over-voltage and short-circuit protection on outputs

• Diagnostics: Fault detection with LED indication

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

• Temperature Range: 0°C to +60°C

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

Key Features & Advantages

• Centralized Control: The GE DS3800HCMC1A1A manages all multiplexer boards in the system, ensuring synchronized scanning.

• Simple Configuration: Jumper-selectable scan speed and skip mode.

• External Trigger: Allows synchronized scanning with external events.

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

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

Typical Application Cases

• Multi-Board Multiplexing: Coordinates scanning across multiple multiplexer boards.

• Synchronized Data Acquisition: Synchronizes analog scanning with external events.

• Basic Scanning Applications: Suitable for standard multiplexer systems without priority scanning.

Competitive Comparison

The GE DS3800HCMC1A1A is functionally identical to the base DS3800HCMC, providing reliable centralized multiplexer control.

Selection Guidelines & Precautions

1. Scan Speed Selection: Configure for 100 or 200 channels per second to match your system’s requirements.

2. Skip Mode: Unused channels should be set to “skip” to optimize scan time.

3. External Trigger: Use for synchronized scanning with other systems.

4. Wiring: Use shielded cables for trigger inputs.

5. ESD Handling: Use ESD-safe practices.

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

   • Scan speed verification (100/200 ch/s)

   • External trigger functionality test

   • Output control signal verification

7. Spare Strategy: Keep one spare GE DS3800HCMC1A1A on-site for critical multiplexer systems. If advanced features like priority scan are required, consider upgrading to a later revision.