Digital guide
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GE DS3800NGRA
- Product Name: GE Speedtronic Mark IV Regulator / General-Purpose Remote Adapter Board
- Product Overview: A printed circuit board within the GE Mark IV series for steam/gas turbine management. Depending on configuration, it functions as a computer regulator board or a general-purpose remote adapter providing configurable remote I/O interfaces for distributed control.
Detailed content
- Technical Specifications:
- Series: GE Speedtronic Mark IV
- Board Function: Regulator / Configurable general-purpose remote adapter
- Central Connector: 28-pin female Augat connector
- Edge Connectors: Four right-angle PCB mating connectors (218A4637), one P4 and one P6 on each short edge
- Operating Temperature: 0°C to 60°C (non-condensing)
- Dimensions: 328 mm × 185 mm × 20 mm (full-length Mark IV board)
- Backplane Current: +5 V DC @ 0.7 A, +12 V DC @ 0.3 A
- Components: Analog switches, hex inverters, precision amplifiers, voltage comparators, dual retriggerable monostables; ceramic, polyester film, and fixed vacuum capacitors; ceramic-over-metal-film and carbon-composite resistors
- Diagnostics: LEDs for Power, Link, Activity, Fault
- Functional Features: For the regulator role, it conditions and regulates control signals for turbine automation. For the remote adapter role, it provides flexible, configurable remote I/O interfaces adapted to different configurations; communicates with DS3800DMP series CPUs via the Mark IV backplane.
- Application Scenarios: Mark IV gas and steam turbine management; automated start-up/shut-down; monitoring of water, air, and fuel emissions; distributed remote I/O in turbine control rooms.
- Installation & Use Notes: Board is factory-drilled and alignment-marked for correct seating in the Mark IV rack. The Mark IV backplane is NOT hot-swappable—power down the cabinet, lock out the breaker, and wait 60 seconds before removal or installation. For remote adapter configurations, photograph jumper settings before removal to replicate on the replacement.
