IS220YSILH1B - Core Safety Protection I/O Pack

SPECIFICATIONS

Part No.: IS220YSILH1B
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 10.16 cm wide x 33.02 cm high
Temperature: -30 to 65oC
Technology: Surface-mount
Product Type: Core Safety Protection I/O Pack
Availability: In Stock
Series: Mark VIe

Functional Description

IS220YSILH1B is a Core Safety Protection I/O Pack developed by GE. It is a part of Mark VIe control system. The I/O pack, with its backup overspeed protection system and watchdog functionality, plays a pivotal role in ensuring the safety and reliability of the Mark VIeS control system, providing redundancy and resilience in critical applications.

Features

• Backup Overspeed Protection and Watchdog Function: The I/O pack, in conjunction with associated terminal boards, plays a pivotal role in providing independent backup overspeed protection and a watchdog function for the primary control within the Mark VIeS control system. This dual functionality enhances system reliability and safety, ensuring continuous monitoring and intervention in critical situations.
• System Configuration: The backup overspeed protection system comprises three TMR (Triple Modular Redundancy) I/O packs, strategically mounted onto TSCA (Terminal Strip Connection Assembly) terminal boards. These terminal boards are interconnected with three SCSAs (System Control Switch Assembly) via serial cables, establishing vital communication channels crucial for system coordination and redundancy. This configuration ensures redundancy and resilience, mitigating the risk of single points of failure.
• Primary and Backup Trip Systems: At the trip terminal board level, the Mark VIe control system implements both primary and backup trip systems to ensure comprehensive protection. The primary protection system, managed by the YTUR pack, operates a primary trip board (TRPG, TRPA). In parallel, the YSIL I/O pack takes charge of overseeing emergency trip relays (ETRs) on the TRPA, thus constituting the backup protection system. This dual-tiered approach enhances system reliability and safeguards against potential failures or malfunctions.
• Functionality of I/O Pack: Designed to accept 12 speed signals, encompassing various parameters such as basic overspeed, acceleration, deceleration, and hardware-implemented overspeed probes. It actively monitors the primary control system, particularly the Mark VIeS controller, and can assess normal operation by observing the primary speed signal. Additionally, the YSIL conducts comprehensive checks on the status and operation of the TSCA through a set of feedback signals, ensuring the integrity and reliability of the entire system.
• Independence from Mark VIe Controller: A critical aspect of the I/O pack is its independence from the Mark VIe controller. This autonomy ensures that the functionality of the I/O pack remains unaffected by the operation of the primary control system. Consequently, even in the event of primary control system failures or disruptions, the YSIL I/O pack can continue to perform its safety-critical functions without compromise, thereby enhancing overall system robustness and reliability.

The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS220YSILH1B?
It is a Core Safety Protection I/O Pack developed by GE under the Mark VIe series.

What is the role of the I/O pack within the Mark VIeS control system?
It plays a crucial role in providing independent backup overspeed protection and serving as a watchdog for the primary control system. This dual functionality enhances system reliability and safety.

How does the I/O pack contribute to backup overspeed protection?
In the event of a failure in the primary overspeed protection system, the I/O pack steps in to provide an additional layer of defense against overspeed conditions, ensuring uninterrupted operation and mitigating risks.

What does the watchdog function of the I/O pack entail?
It continuously monitors critical parameters, such as speed signals and feedback signals from the TSCA, to assess the performance of the primary control system, particularly the Mark VIe controller. It proactively identifies and addresses any anomalies or deviations from expected behavior, enhancing system reliability.