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GE DS3800HLOC1A1B

Product Name:​ GE Speedtronic Mark VI Low-Level Analog I/O Link Card / Thermocouple Interface Module
Product Introduction:​ The GE DS3800HLOC1A1B is a fully populated I/O link card from the Mark VI Speedtronic series, combining low-level millivolt input capability with factory-optimized jumper settings for Type J thermocouples, integrated cold-junction compensation, and internal IONet termination. This variant is specifically engineered for exhaust gas temperature monitoring and other thermocouple-based applications requiring accurate measurement with simplified end-of-chain installation.
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Detailed content

Technical Specifications:
  • Brand: General Electric (GE)
  • Series: Mark VI / Speedtronic
  • Core Function: High-density I/O interface board for turbine control; handles low-level analog millivolt inputs
  • Input Voltage: 24 VDC ±10% (nominal)
  • Discrete Inputs: 16 optically isolated, 24 V sink/source
  • Discrete Outputs: 16 solid-state, 0.5 A per channel max
  • Thermocouple Inputs: 8 channels, factory-configured for Type J (all channels)
  • Thermocouple Range (Type J): –40°C to +760°C (–40°F to +1,400°F)
  • Cold-Junction Compensation: Onboard sensor, ±0.5°C accuracy, factory-calibrated
  • Analog Input Impedance: > 10 MΩ (differential)
  • Operating Temperature: 0°C to +60°C ambient
  • Condition: New Surplus / OEM Pulls
Factory Configuration (Suffix Meaning):
  • The ‘C’ in the base model provides internal IONet termination
  • The first ‘A’ specifies Type J thermocouple configuration
  • The second ‘B’ confirms internal termination is active
Functional Features:
  • Factory-set jumper configuration enables Type J thermocouple operation with cold-junction compensation on all eight analog channels
  • Internal IONet termination eliminates the need for external signal conditioners or network terminators
  • Accurate temperature measurement at end-of-chain positions
Application Scenarios:​ Gas turbine installations monitoring combustion temperatures (typically up to 760°C with Type J sensors) at end-of-chain positions; exhaust gas temperature monitoring and other thermocouple-based applications.
Usage Notes:​ Verified units with logged firmware versions and complete test records are recommended for deployment.

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