GE DS200SDCIG2AHB SDCI Serial Data Communication

Product Description

DS200SDCIG2AHB belongs to GE DS200 series Mark V Speedtronic dedicated control card, full name SDCI serial data communication interface board, also integrated DC power supply 

regulation and drive signal conditioning functions, specially matched with GE Mark V steam turbine, gas turbine, combined cycle unit control rack and DC2000 power drive unit.

This board undertakes two core tasks in the turbine protection control system: First, realize serial data communication interaction between Mark V main controller and DC2000 actuator drive, 

valve servo driver, auxiliary fan control units through GE proprietary serial bus protocol, transmit speed control commands, valve opening setpoints and return operating status feedback signals; 

Second, provide stable regulated DC auxiliary power supply for local small signal conditioning circuits, complete CT current load matching, contactor dropout time hardware jumper setting and 

signal filtering isolation processing via on-board jumpers JP1/JP2 and DIP switch SW1.

It is equipped with front panel running/fault LED indicators, industrial three-proof conformal coated PCB, standard Eurocard plug-in structure for Mark V cabinet backplane direct insertion. 

Widely used as mandatory maintenance spare parts for thermal power generating units, petrochemical large turbomachinery, pipeline compressor station Mark V old control system overhaul, 

directly related to turbine speed regulation, fuel valve execution and emergency trip safety loop reliability.

Technical Specifications

Model: DS200SDCIG2AHB, Brand: General Electric, Origin: United States

Applicable System: GE Mark V Speedtronic Turbine Control System, matched DC2000 drive modules

Board Type: SDCI serial communication interface + DC power instrumentation integrated board

Bus Protocol: GE Mark V proprietary internal serial data communication protocol

Hardware Configuration: Onboard JP1 control source jumper, JP2 contactor delay jumper, SW1 CT load selection DIP switch

Power Supply: Powered by Mark V rack internal backplane bus 18–32VDC industrial power

Power Consumption: Max 12W

Signal Isolation: Built-in EMI/RFI filtering and electrical isolation circuit to avoid ground loop interference

Operating Temperature: 0℃ ~ +60℃ continuous full-load long-term operation

Storage Temperature: -40℃ ~ +85℃

Ambient Humidity: 5%–95% non-condensing environment, moisture-proof, mildew-proof and salt fog resistant coated circuit board

Protection Class: IP20, only installed inside turbine control sealed electrical cabinet

Mounting Method: Standard Mark V rack Eurocard slot plug-in installation

Net Weight: Approx. 0.45kg (1lb)

Certifications: CE, industrial EMC anti-interference certification, power industry turbine control standard compliance

Key Features

Dedicated communication gateway for Mark V host and DC2000 drive, stable deterministic serial data transmission to ensure turbine fuel valve, governor actuator accurate action response.

Flexible on-board hardware jumpers and DIP switches, on-site free configuration of control source mode, contactor dropout delay time and CT secondary load parameters without program modification.

Integrated local DC power regulation circuit, provide clean and stable working power for signal acquisition and small logic circuits of the whole card, reduce power fluctuation measurement drift.

Complete hardware self-diagnosis function, LED light real-time display power status, communication heartbeat and internal circuit fault, convenient for field maintenance personnel rapid fault location.

Strict industrial-grade anti-vibration and anti-interference design, adapt to high vibration, strong electromagnetic interference harsh environment of turbine room and power plant central control room.

Pin-to-pin compatible with the base version DS200SDCIG2, power-off one-to-one direct replacement without backplane wiring transformation, greatly shorten unit maintenance outage time.

Static sensitive device with marked ESD protection requirement, standard anti-static packaging and handling specification, effectively avoid chip breakdown caused by static electricity impact.

Mature and stable application on thousands of Mark V turbine control systems worldwide, irreplaceable core spare part for power plant unit safety control loop risk prevention and equipment renovation.