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GE IS420YDOAS1B - Mark VIe Discrete Output I/O Pack
GE IS420YDOAS1B - Mark VIe Discrete Output I/O Pack - Image 2

GE IS420YDOAS1B – Mark VIe Discrete Output I/O Pack

Original price was: $57,000.00.Current price is: $56,888.00.

  • Brand: General Electric (GE)
  • Model: IS420YDOAS1B
  • Warranty: One Year
  • Condition: 100% New & Original
  • Output Channels: 12 Discrete Outputs
  • Output Voltage: 24V DC (Standard nominal)
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Description

1. Product Title

GE IS420YDOAS1B – Mark VIe Discrete Output I/O Pack

 

2. Product Overview

The IS420YDOAS1B is a high-reliability Discrete Output (DO) I/O pack manufactured by General Electric as part of the Mark VIe Distributed Control System (DCS). This module serves as the critical interface between the control system’s digital logic and the physical field equipment, such as solenoid valves, relays, and motor starters.

The IS420YDOAS1B is designed to solve the challenges of modern industrial turbine and plant control. It converts digital commands from the controllers—received via dual high-speed Ethernet (IONet)—into 12 individual 24V DC discrete outputs. This module is engineered for high-availability applications, supporting redundant configurations to ensure that a single component failure does not lead to an unplanned system shutdown. Its rugged design and advanced diagnostics make it a cornerstone for GE gas and steam turbine control solutions.

 

3. Technical Specifications

  • Brand: General Electric (GE)
  • Model: IS420YDOAS1B
  • Warranty: One Year
  • Condition: 100% New & Original
  • Output Channels: 12 Discrete Outputs
  • Output Voltage: 24V DC (Standard nominal)
  • Communication: Dual 100MB Ethernet (IONet)
  • Operating Temp: -30°C to +65°C (-22°F to +149°F)
  • Processor: High-speed 32-bit RISC processor
  • Diagnostics: Individual channel status monitoring and loopback testing
  • Redundancy: Supports Simplex, Dual, and TMR (Triple Modular Redundancy)

 

4. Key Features & Benefits

  • High-Speed Connectivity: The IS420YDOAS1B utilizes dual Ethernet IONet ports, ensuring low-latency communication and providing a redundant data path for mission-critical commands.
  • Advanced Diagnostics: Includes comprehensive “loopback” monitoring, which allows the controller to verify that the output state in the field matches the commanded state, significantly increasing system safety.
  • TMR Capability: When used in a Triple Modular Redundant (TMR) configuration, the module allows for hardware voting at the terminal board level, providing the highest level of fault tolerance available in industrial control.
  • Ruggedized Industrial Design: Specifically built to operate in harsh turbine room environments, withstanding high ambient temperatures and electromagnetic interference without performance degradation.

 

5. Application Scenarios

  • Turbine Control Systems: The IS420YDOAS1B is primarily used in GE Mark VIe systems to actuate fuel valves, hydraulic trips, and cooling fans on large-scale gas and steam turbines.
  • Power Plant Balance of Plant (BOP): Deployed to manage auxiliary equipment, such as pump motors and motor-operated valves (MOVs), across a power generation facility.
  • Oil & Gas Compression: Used in the control logic for heavy-duty compressors and pumping stations where fail-safe discrete signaling is required for operational safety.

 

6. Frequently Asked Questions (FAQ)

  • Q: What is the primary function of the IS420YDOAS1B?
    • A: It is an I/O module that receives digital commands over Ethernet and provides 24V DC discrete signals to drive field devices like relays and solenoids.
  • Q: Does the IS420YDOAS1B require a specific terminal board?
    • A: Yes, it is typically mounted onto a TBCP, TDOA, or TDRH terminal board. The combination of the I/O pack and the terminal board defines the specific electrical characteristics of the output.
  • Q: Is this module hot-swappable?

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