Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Analog Inputs | 8 differential, thermocouple-dedicated |
| Input Types | TC (J,K,T,E,R,S,B,N) – N-type supported |
| Analog Outputs | None (input-only) |
| ADC Resolution | 18-bit sigma-delta (effective: 16.2 bits) |
| Sampling Rate | 10-300 Hz per channel (user-selectable) |
| Accuracy | ±0.06% FS (25°C); ±0.15% (-40°C to +85°C) |
| CJC Accuracy | ±0.35°C (integrated) |
| Isolation | 1500V RMS (field-to-backplane) |
| CMRR | >98 dB at 50/60 Hz |
| Operating Temp | -40°C to +85°C |
| Power Supply | +5V @ 1.15A; +15V @ 0.45A (VME backplane) |
| Power Dissipation | 8.7W max |
| Diagnostics | Open/short detection, out-of-range, rate-of-change, CJC health, basic telemetry |
| Form Factor | 6U VME (single-slot) |
| Firmware | Factory-programmed (not field-upgradeable on this revision) |
| Conformal Coating | No |
| MTBF | >230,000 hours |
Advantages and Key Features
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Thermocouple-Dedicated – Optimized exclusively for TC signals; no unnecessary circuitry.
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18-Bit ADC – Superior resolution over 16-bit HMPF series.
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Improved Effective Resolution – 16.2 bits (better than 1C1C’s 16.0 bits).
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Faster Sampling – Up to 300 Hz, improved over 1C1C (200 Hz).
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Improved CJC – ±0.35°C, better than 1C1C (±0.4°C).
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N-Type Support – Added support for N-type thermocouples (not available in HMPF).
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Enhanced Diagnostics – Rate-of-change detection and basic telemetry.
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Hot-Swap Capable – IEEE 1101.11 compliant.
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ITS-90 Linearization – Full standard tables including N-type.
Application Fields
| Industry | Applications |
|---|---|
| Power Generation | GE Frame 6B/7E/7FA/9E gas turbines – EGT monitoring, combustion mapping |
| Steam Turbines | GE D-11/D-15 – high-pressure steam temperature, bearing monitoring |
| Combined Cycle | HRSG superheater/reheater outlet temperature |
| Oil & Gas | LM2500/LM6000 – turbine exhaust temperature, compressor discharge |
Comparison with Other GE Revisions
| Feature | DS3800HMPG1D1D | DS3800HMPG1C1C | DS3800HMPG | DS3800HMAC1H1F |
|---|---|---|---|---|
| ADC Resolution | 18-bit (16.2 eff.) | 18-bit (16.0 eff.) | 18-bit (16.5 eff.) | 18-bit (16.8 eff.) |
| Accuracy | ±0.06% | ±0.08% | ±0.05% | ±0.04% |
| CJC Accuracy | ±0.35°C | ±0.4°C | ±0.3°C | ±0.4°C |
| Max Sampling | 300 Hz | 200 Hz | 500 Hz | 1000 Hz |
| Isolation | 1500V | 1500V | 2000V | 2500V |
| Firmware Upgrade | No | No | Yes (JTAG) | Yes |
| Conformal Coating | No | No | Optional | Standard |
| N-Type Support | Yes | Yes | Yes | Yes |
| MTBF | 230k hrs | 225k hrs | 240k hrs | 280k hrs |
Competitor Comparison:
| Feature | DS3800HMPG1D1D | Siemens 6ES7531-7KF00 | ABB AI810 |
|---|---|---|---|
| Platform | GE VME Speedtronic | S7-1500 (Profinet) | ABB 800xA |
| VME Native | Yes | No | No |
| CJC Accuracy | ±0.35°C | ±0.5°C (external) | ±1.0°C |
| Isolation | 1500V | 500V (group) | 2500V |
| Hot-Swap | Yes | No | Yes |
Selection Recommendations
| Scenario | Recommendation |
|---|---|
| Existing installation with 1D1D | Continue use if acceptable; spares limited. |
| Need improved accuracy/speed/isolation | Upgrade to full DS3800HMPG (±0.05%, 500Hz, 2000V, field-upgradeable). |
| Need outputs | Use DS3800HMAC1G1E or DS3800HMAC1H1F. |
| Need highest accuracy/speed | Upgrade to DS3800HMAC1H1F (18-bit, 1000Hz, 2500V). |
| Need N-type support | 1D1D supports N-type – acceptable. |
| Triple-redundant | Use three identical 1D1D modules. Do not mix with other revisions. |
| Non-GE retrofit | Do not use – strictly for VME Speedtronic. |
| Spare stock | Limited – source refurbished units from certified centers. |
Critical Precautions
Pre-Installation
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Authenticate module – Check GE hologram labels; verify serial number.
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Inspect connectors – Check P1/P2 for bent pins or corrosion.
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Firmware note – Factory-programmed; cannot be field-updated.
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Verify calibration – 1D1D has specific calibration profile; confirm with GE documentation.
Installation
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ESD protection – Wear grounded wrist strap; handle by edges only.
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Backplane voltage – Verify +5V (±2%), +15V (±1.5%), -15V (±1.5%).
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Insertion – Align guides; apply even pressure; tighten screws to 0.4-0.6 Nm. Never force.
Field Wiring (Critical for TC)
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Cable – Must use thermocouple-grade extension wire matching TC type. Copper wire introduces errors.
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Shielding – Belden 8760 or equivalent; ground shield only at module end.
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Separation – 30cm from AC power; 60cm from VFD cables; cross at 90° if unavoidable.
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Torque – 0.5-0.6 Nm.
Environmental
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CJC stability – Avoid heat sources or air vents near terminal block.
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Operating temp – -40°C to +85°C; keep rack <70°C.
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Warm-up – Allow 30 minutes for CJC stabilization.
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Humidity – 5-95% RH non-condensing.
Procurement
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Authentic sourcing – Obsolete; source from certified GE repair centers only.
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Refurbished units – Request CJC calibration certificate and 1-year warranty.
A-B 1769-OB16
A-B 1769-IQ32
SIEMENS 6ES7322-1BH01-0AA0
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