DS4820B1SA - Backplane Assembly

SPECIFICATIONS

Part Number: DS4820B1SA
Manufacturer: General Electric
Series: Mark IV
Product type: Backplane Assembly
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

DS4820B1SA is a Backplane Assembly designed and developed by GE. It is a part of Mark IV control system. This backplane assembly provides mechanical support and facilitates communication pathways between the controller, I/O boards, and other peripheral devices. By ensuring proper signal routing and power distribution. Its robust backplane design supports the modular nature of the Mark IV system, enabling easier maintenance, upgrades, and system scalability.

System Operator Interface

• The operator interface is a crucial part of the turbine control system, designed to provide operators with a reliable and user-friendly platform for managing turbine operations. It comprises a control insert and a printer, both housed within a convenient roll-out drawer for ease of access. This layout allows operators to interact directly with the control system and maintain clear records of operations through printed logs.
• At the core of the interface is an industrial-grade membrane switch, which offers enhanced reliability compared to older systems that relied on dedicated mechanical switches and hand wiring. This modern switch panel is more durable and requires less maintenance, making it well-suited for demanding industrial environments.
• The operation of the membrane switch follows a two-step process to ensure intentional control inputs. First, pressing a pad on the switch panel "arms" the desired command. This action is confirmed by a flashing LED indicator and an audible beep, signaling that the system is ready to execute the command. The operator then presses the "execute" pad, which initiates the turbine response and changes the LED to a steady light, confirming successful command execution.
• To enhance safety, the system includes a timeout feature. If there is a delay of more than two seconds after arming the command without pressing the execute pad, the system will cancel the command. The flashing LED turns off, and any attempt to execute the command afterward will be ignored. This mechanism helps prevent unintentional or delayed operations, adding an extra layer of operational security.
• Additionally, the built-in printer serves an essential function by providing real-time hard copy logs of system events, alarms, and operator actions. This feature supports accurate documentation and aids in diagnostics and performance tracking.

WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.

FREQUENTLY ASKED QUESTIONS

What is DS4820B1SA?
It is a Backplane Assembly designed and developed by GE.

What type of switch is used in the interface?
An industrial-grade membrane switch is used, replacing traditional mechanical switches with hand wiring. This enhances durability, reliability, and ease of maintenance.

What happens if the operator delays after arming a command?
If more than 2 seconds pass after arming a command without executing it, the system cancels the action, the flashing LED turns off, and the execute command will be ignored. This is a safety feature to prevent unintended operation.

Why is the two-step command process important?
This process ensures that only deliberate and timely commands are executed, reducing the risk of operator error and improving overall system safety.