The GE DS200TCQCG1BJF is an Analog IO Expander Board (TCQC) integral to the Mark V LM Series within GE’s Speedtronic Control System. It enhances the system’s capability to process additional analog signals from I/O core terminal boards, handling scaling, conditioning, and distribution of critical data for turbine operation. Key functions include providing excitation for LVDTs/LVDRs, terminating IONET connections, and processing megawatt transducer signals—scaling them before transmission to the STCA board via the 19PL connector. It also conditions pulse rate inputs and exchanges generator/line signals with the STCA board through the JE connector, making it vital for seamless turbine control.
Key Features:
Comprehensive Signal Processing & Distribution
The board excels in managing diverse analog signals, it scales and conditions megawatt transducer inputs, pulse rate signals, and generator/line data. It routes processed signals to critical components—sending shaft speed/flow data to the TCQA board via JE and megawatt signals to the STCA board via 19PL. Additionally, it provides excitation for LVDTs/LVDRs, ensuring accurate position sensing essential for turbine actuation.
Servo Valve Control Circuitry
Dedicated circuits manage servo valve regulation, jumpers scale current from the TCQA board to position valves, with reference feedback and current ranges set via hardware. The board integrates servo clamp relays applying positive current to valves and suicide relays grounding signals to let valves drift to bias positions. Suicide relays activate via signals from the CSP routed through the TCQA board, ensuring safe, controlled valve operation during fault conditions.
IONET Integration & System Compatibility
It hosts IONET termination for specific cores when the optional 21> is installed, enhancing communication within the Speedtronic system. Its standardized connectors ensure seamless interaction with the STCA and TCQA boards, maintaining signal integrity across the control architecture. This integration is critical for synchronizing turbine subsystems, from sensors to actuators.
Tailored for Turbine-Specific Needs
By focusing on high-pressure shaft speed, liquid fuel flow, and servo valve control—parameters vital to gas/steam turbine performance—the board addresses industry-specific demands. Its ability to condition and route these signals with precision supports efficient turbine operation, reduces response latency, and enhances overall system reliability in power generation and industrial settings.
