DS3800DSFC - System Firing Daughter Board

SPECIFICATIONS

Part Number: DS3800DSFC
Manufacturer: General Electric
Series: Mark IV
Product type: System Firing Daughter Board
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

DS3800DSFC is a System Firing Daughter Board developed by GE. It is a part of Mark IV control system. As a daughter board, it connects to a main control board (motherboard) within the Mark IV rack system, extending the functionality of the core board with specialized firing control features.

Features

• Firing Logic Management: The board is responsible for executing firing logic commands during startup, transition, and shutdown. It ensures ignition occurs in the proper sequence and timing for reliable turbine operation.
• Interfacing with Control Circuits: It works in coordination with other core control boards to issue start signals, manage fuel delivery, and oversee ignition control.
• Diagnostics and Monitoring: Built-in circuitry allows for monitoring system parameters and provides feedback to the control system, helping to detect faults in ignition or misfiring conditions.

Operator Interface

The Mark IV Operator Interface is designed for ease of use, real-time interaction, and operational safety. It consists of:

• A control insert is located in a roll-out drawer, and
• A built-in printer for logging events and alarms.

Key features of the interface include:

• Membrane Switch Keypad: The industrial-grade membrane switch panel offers enhanced reliability over traditional hand-wired switches. Operators initiate turbine actions through a two-step process:
  • Arm Command: Pressing a membrane pad activates the arm function. This is acknowledged visually by a flashing LED and audibly by a beep.
  • Execute Command: Pressing the execute pad finalizes the command. The LED turns steady, and the control action (e.g., turbine start or stop) is carried out.
• Timed Safety Feature: If the execute pad is not pressed within 2 seconds of the arm command, the system automatically cancels the request, extinguishing the flashing LED to prevent accidental operation.

System Significance

• Enhance operational safety by requiring intentional, two-step commands.
• Support accurate turbine firing sequences critical to startup reliability.
• Contribute to reduced operator error and system misfires.
• Align with GE’s overall focus on modular design, ease of maintenance, and system redundancy in turbine control systems.

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 DS3800DSFC?
It is a System Firing Daughter Board developed by GE.

What type of input system does the operator interface use?
It uses an industrial-grade membrane switch panel instead of older-style hand-wired dedicated switches. This improves reliability and simplifies system maintenance.

What happens if there is a delay between arming and executing a command?
If more than 2 seconds pass after pressing the arm pad without pressing execute, the flashing LED goes off, and the system ignores the command. This feature prevents accidental or unintended operations.