GE DS3800 Modules – DS3800HIOD1H1G Digital I/O Board

Technical Dossier

Product Details And Specifications

GE DS3800 Series Technical Notes

The Evolution of DS3800 Architecture

The DS3800 platform was introduced as the successor to GE's earlier Mark I, II, and III turbine control generations. Mark IV represented a significant architectural shift: modular card-cage construction replaced hardwired relay logic, enabling field-replaceable I/O and processor boards. The system uses a VME-adjacent backplane with proprietary GE bus signaling. Each card communicates via the ARCNET-based Speedtronic data highway, operating at low baud rates by modern standards but with deterministic latency suited to turbine sequencing.

Key architectural characteristics of the DS3800 platform include: dual-redundant processor configurations (using boards such as DS3800HMPG and DS3800NMEC), analog and digital I/O segregation across dedicated card types, and a power distribution architecture relying on DS3800 series power supply boards. Compatibility between sub-revisions (e.g., H1A vs. H1G suffix variants) is not always guaranteed and must be verified against the specific panel revision. GE transitioned customers toward the Mark V (DS200 series) and later Mark VI (IS200 series) platforms through the 1990s and 2000s. The DS3800 series is now fully discontinued and classified as end-of-life by GE Vernova (formerly GE Gas Power).

DS3800 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly encountered modules within the GE DS3800 / Mark IV Speedtronic platform. Modules are grouped by functional category.

Digital & Analog I/O Boards

• DS3800HIOD1H1G: Digital I/O board; handles discrete input/output signal interfacing for turbine sequencing logic.
• DS3800HAID1C1C: Analog input board; conditions and digitizes analog process signals (4–20 mA, thermocouple).
• DS3800HAOD1A1A: Analog output board; converts digital control signals to analog actuator commands.
• DS3800HDID1A1A: High-density digital input board; expands discrete input capacity within the card cage.
• DS3800HDOD1A1A: High-density digital output board; drives relay and solid-state output channels.
• DS3800HVIA1A1A: Vibration input board; conditions accelerometer and proximity probe signals for turbine shaft monitoring.

Processor & Controller Boards

• DS3800HMPG1A1A: Main processor board; executes the Mark IV control application and manages inter-board communication.
• DS3800NMEC1A1A: Memory and executive controller board; stores control program and manages sequencing execution.
• DS3800HCMA1A1A: Communications adapter board; interfaces the Mark IV system with external SCADA or DCS networks.
• DS3800HRPG1A1A: Redundant processor board; provides hot-standby failover for the main processor in dual-redundant configurations.

Power Supply Boards

• DS3800DPSG1A1A: DC power supply board; distributes regulated DC voltages to card cage backplane rails.
• DS3800HPSG1A1A: High-capacity power supply board; supports expanded I/O configurations with higher current demand.
• DS3800PSAG1A1A: Power supply auxiliary board; provides secondary voltage regulation for analog subsystems.

Communication & Interface Boards

• DS3800HUMB1A1A: Universal module board; provides flexible I/O mapping for non-standard signal types.
• DS3800HCNA1A1A: Control network adapter; connects the Mark IV panel to plant-level Ethernet or serial historian systems.
• DS3800HSVC1A1A: Service interface board; provides local diagnostic and configuration access port for field engineers.
• DS3800HFPG1A1A: Flame detector input board; processes UV/IR flame scanner signals for combustion monitoring.
• DS3800HTBA1A1A: Terminal board adapter; provides screw-terminal field wiring interface for I/O cards.

Quality Control for the DS3800 Range

DS3800 boards present specific test challenges due to their proprietary backplane bus architecture and age-related component degradation. DriveKNMS applies the following test protocol to all DS3800 inventory prior to shipment:

All tested units are issued a DriveKNMS inspection report and shipped with ESD-protective packaging.