DS3820WGCA1B - Printed Circuit Board

SPECIFICATIONS

Part No.: DS3820WGCA1B
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Product Type: Printed Circuit Board
Availability: In Stock
Series: Mark IV

Functional Description

DS3820WGCA1B is a Printed Circuit Board developed by GE. It is a part of the Mark IV control system. The Mark IV Control System is a robust and advanced turbine control system developed by GE (General Electric) for managing and automating the operations of gas and steam turbines. Mark IV system marked a significant step forward in turbine control technology, incorporating redundancy, diagnostic capabilities, and modern electronic controls.

Mark IV online diagnostics

The purpose of the Mark IV online diagnostics system is to continuously monitor and check the hardware for potential faults while the turbine control panel is operational. This proactive system is designed to identify and report faults that might otherwise go unnoticed due to the system’s built-in redundancy. By detecting these issues early, necessary repairs can be made, preventing them from escalating into a forced turbine outage at a later stage.

To ensure the normal operation of the turbine is not disrupted, the diagnostics tasks are assigned the lowest priority and are executed only during otherwise idle times. The self-testing capabilities of the system cover a comprehensive range of checks, including:

• PROM Checksums: Verifying the integrity of programmable read-only memory data.
• Battery-Backed RAM (BRAM) Checksums: Ensuring data integrity in battery-supported memory.
• RAM Data Tests: Testing the operational reliability of random-access memory.
• Analog Signal Voting: Cross-verifying analog signal inputs for consistency across redundant channels.
• Logic Signal Voting: Checking logic signals for proper alignment across redundant paths.
• Power Supply Limits: Monitoring power supply voltages to ensure they remain within acceptable ranges.
• Auxiliary Processor Errors: Identifying errors in auxiliary processors that support main system functions.
• Communication Errors Between C and RST Processors: Detecting faults in communication between critical processors.
• Optional Communication Errors Between C and Remote Systems: If applicable, monitor communication links with remote systems.
• Thermocouple Channel Errors: Checking for faults in thermocouple input channels used for temperature measurements.
• Analog Input/Output Errors: Verifying the accuracy and functionality of analog I/O channels.
• Idle Time Limits: Ensuring diagnostic tasks do not interfere with turbine operation by running only during idle periods.

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

Frequently Asked Questions

What is DS3820WGCA1B?
It is a Printed Circuit Board developed by GE under the Mark IV series.

What does Triple Modular Redundancy (TMR) mean?
TMR is a fault-tolerant design that involves three independent control processors (R, S, T) and a monitor processor (C). It ensures the turbine can operate safely even if one processor fails, enhancing reliability and uptime.

How does the Mark IV handle faults?
The system has comprehensive online diagnostic tools that continuously monitor hardware and software. Detected faults are annunciated promptly, enabling early detection and repair to prevent forced outages.