GE DS4815RVTB VOTER CARD

الوصف

The GE DS4815RVTB is a Voter Card for the Mark V Speedtronic turbine control system. It is a critical component of the system’s Triple Modular Redundancy (TMR) architecture, responsible for implementing the 2-out-of-3 voting logic that ensures continuous, fault-tolerant operation.

Technical Breakdown 🧠

This card is at the heart of the Mark V’s high-reliability design.

• 2-out-of-3 Voting: The RVTB card receives three separate, identical input signals from the three redundant control processors (R, S, and T). It then compares these three signals. If one signal deviates from the other two, the voter card rejects the faulty signal and uses the two identical, “correct” signals to determine the output. This logic allows the system to instantly and transparently discard data from a failing component without interrupting the control process.
• Fault Tolerance: This voting mechanism is the key to the Mark V’s fault tolerance. It ensures that a single failure in a processor, a sensor, or an I/O card will not cause a turbine trip or shutdown. The system continues to operate reliably while maintenance personnel are alerted to the failed component.
• System Integration: The card is designed to plug directly into the Mark V backplane, where it is positioned to receive inputs from all three redundant processors (R, S, and T), making it a central point for ensuring signal integrity.

Applications 🏭

The DS4815RVTB is a fundamental component in Mark V control panels for:

• Ensuring Reliability: Providing a high degree of reliability and uptime by allowing the system to operate even in the presence of a single component failure.
• Safety: Preventing spurious trips by using a “majority rules” principle for critical control and protection signals.
• Maintenance: Flagging a failed module so it can be replaced without interrupting system operation.