How many logic card assemblies are used in the turbine start/stop sequencing?

The correct answer is based on the specific architecture and configuration of the turbine control systems. In many gas turbine systems, a total of seven logic card assemblies are commonly utilized for handling the start and stop sequencing of the turbine. These logic cards are essential for processing various inputs and controlling outputs that are critical during turbine operation, ensuring proper sequencing according to operational parameters and safety protocols.

The logic card assemblies work together to monitor and manage the necessary conditions that must be met before starting the turbine, as well as to sequence the shutdown process effectively. Each card typically has a designated function, contributing to the overall task of maintaining the integrity and efficiency of the turbine's operation during these crucial phases.

Understanding the number of logic card assemblies is vital for troubleshooting and maintenance procedures since each assembly plays a specific role in the overall functionality of the turbine's start/stop control logic.