GE DS3800HCMC1C1C

Technical Specifications

• Product Type: High-Current Multiplexer Controller Board (Revision 1C1C)

• Part Number: DS3800HCMC1C1C

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems (Rev. M and later)

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

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

• Scan Speed: Selectable 100, 200, 500, 1000, or 2000 channels per second – expanded

• Priority Channels: Up to 16 channels can be designated for priority scanning – expanded

• Priority Ratio: Priority channels scanned at 2x, 4x, or 8x base rate – new feature

• Synchronization: External trigger input with adjustable trigger delay (0-500ms) – improved

• Output: Channel address and control signals to multiplexer boards

• Protection: Enhanced over-voltage and short-circuit protection on outputs

• Diagnostics: Fault detection with LED indication and backplane reporting (scan status, priority status, trigger status)

• Isolation: 2500Vrms reinforced isolation with enhanced common-mode transient immunity (> 75kV/µs)

• Temperature Range: -40°C to +80°C (extended)

• MTBF: > 220,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Priority Scan Capability: The GE DS3800HCMC1C1C allows up to 16 priority channels scanned at up to 8x the base rate for critical parameters.

• Higher Scan Speed: Supports up to 2000 channels per second for ultra-fast data acquisition.

• Adjustable Trigger Delay: 0-500ms delay for precise synchronization with external events.

• Advanced Diagnostics: Scan, priority, and trigger status reporting for predictive maintenance.

• Reinforced Isolation: 2500Vrms with transient immunity (> 75kV/µs) for superior noise rejection.

• Extended Temperature Range: -40°C to +80°C suits harsh environments.

Typical Application Cases

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

• Priority Scanning: Scans critical channels (overspeed, exhaust temperature) more frequently.

• High-Speed Data Acquisition: Suitable for applications requiring up to 2000 channels per second.

• Synchronized Data Acquisition: Synchronizes with external events for time-critical measurements.

• Extreme Environment Installations: Extended temperature range suits offshore, arctic, or desert sites.

Competitive Comparison

The GE DS3800HCMC1C1C offers the highest scan speed, most priority channels, and widest temperature range in the HCMC series.

Selection Guidelines & Precautions

1. Scan Speed Selection: Configure for 100, 200, 500, 1000, or 2000 ch/s to match your application.

2. Priority Channels: Designate up to 16 critical channels and select priority ratio (2x, 4x, or 8x).

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

4. Trigger Delay: Adjust delay (0-500ms) for precise synchronization with external events.

5. Diagnostic Reporting: Requires Mark IV firmware Rev. M or later for full diagnostic support.

6. Wiring: Use shielded cables for trigger inputs; ground shield at board end only.

7. ESD Handling: Use ESD-safe practices.

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

   • Scan speed verification (100-2000 ch/s)

   • Priority scan functionality verification (up to 16 channels, 2x/4x/8x)

   • Trigger delay functionality test (0-500ms)

   • Diagnostic status reporting validation

   • Isolation test (2500Vrms)

   • Transient immunity test (> 75kV/µs)

9. Spare Strategy: Keep one spare GE DS3800HCMC1C1C on-site for critical multiplexer systems. This revision is preferred for advanced applications. If unavailable, the DS3800HCMC1B1B is a compatible alternative with reduced specifications. Proactive replacement after 10 years of continuous operation is recommended.