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The GE DS3810LCJA is a processor card assembly for the GE Speedtronic Mark IV turbine control system. Its main function is to serve as the “brain” of the control system, managing the overall operation, monitoring, and protection of the turbine.
Functions and Features
- Central Processing Unit (CPU): As a processor card, the DS3810LCJA contains the main CPU that executes the control logic for the turbine. It’s responsible for processing data from various input/output (I/O) cards, making real-time control decisions, and sending commands to actuators.
- System Control: This card manages all aspects of turbine operation, from startup and acceleration to running at a set speed and shutting down. It uses complex algorithms to maintain optimal performance and efficiency.
- Protection Logic: A crucial function of this processor card is to implement the system’s protection logic. In the event of a fault, such as an overspeed condition or excessive vibration, the card will execute a pre-programmed shutdown sequence to prevent damage to the turbine.
- Communication: The DS3810LCJA communicates with other cards in the Mark IV system via the backplane (e.g., the DS3800XCIB). It receives data from I/O cards, sends commands to relay driver cards, and exchanges information with other processor cards in redundant systems.
Context in the Mark IV System
The GE Mark IV system is known for its triple modular redundancy (TMR), meaning three identical control systems operate in parallel. In a TMR setup, each control system would have its own DS3810LCJA processor card. These three cards would perform the same calculations independently and then use a voting process to determine the final control action, ensuring high reliability and fault tolerance.
Related Components
- GE DS3800HCDA: This is another processor card used in the Mark IV system. The DS3810LCJA likely works in conjunction with or as a specific variant of this card.
- I/O Cards: Cards that handle analog, digital, or thermocouple inputs send data to the DS3810LCJA for processing.
- Actuators and Relays: The DS3810LCJA sends control signals to these devices to physically control the turbine.
