GE Vernova IS220PDIOH1B – Hazardous Location Discrete I/O Pack for Mark VIe Control Systems
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GE Vernova IS220PDIOH1B – Hazardous Location Discrete I/O Pack for Mark VIe Control Systems

  1. IS220PDIAH1B: Standalone Discrete Input Pack for applications requiring only input signal acquisition.
  2. IS220PDOAH1A / IS220PDOAH1B: Standalone Discrete Output Pack for applications requiring only relay output control.
  3. IS220PDIOH1A: Previous generation PDIO pack with more limited terminal board compatibility (TDBS/TDBT only).
  4. GE ToolboxST / ControlST Software: The standard engineering tool used for configuring, monitoring, and troubleshooting Mark VIe I/O packs and controllers.
  5. Mark VIe Controllers (e.g., UCSC, UCCS): The central processing units that communicate with the IS220PDIOH1B over the IONet Ethernet network.
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Description

GE Vernova IS220PDIOH1B – Hazardous Location Discrete I/O Pack for Mark VIe Control Systems

Executive Summary
The GE Vernova IS220PDIOH1B is a high-reliability Discrete Input/Output (PDIO) Pack designed for the Mark VIe series Distributed Control System (DCS). As an evolution of the previous H1A generation, the H1B revision expands compatibility with a broader range of terminal boards and is specifically approved for use in hazardous locations (Class I, Div. 2 and Class I, Zone 2). It serves as a critical interface between the Mark VIe controller and field devices, managing discrete contact inputs, relay outputs, and contact wetting signals. With dual Ethernet ports, robust self-diagnostics, and inherent soft-start power protection, the IS220PDIOH1B ensures seamless integration and reliable operation in demanding industrial environments such as gas turbine control, power generation, and oil & gas processing.

IS220PDIOH1B

Core Technical Specifications

  • Manufacturer: GE Vernova (formerly GE Energy / GE Grid Solutions)
  • Product Series: Mark VIe Distributed Control System (DCS)
  • Module Type: Discrete Input/Output Pack (PDIO)
  • Input Capacity: Accepts up to 24 discrete contact inputs (0 to 32 Vdc)
  • Output Capacity: Manages up to 12 relay outputs (32 Vdc, 3.15 A dc) and contact wetting outputs (31-32 Vdc, 10-110 mA dc)
  • Communication Interfaces: Dual independent 10/100 Mbps RJ45 Ethernet ports (IONet)
  • Internal Connectivity: DC-62 connector for direct interface with the corresponding terminal board
  • Power Supply: 28 Vdc nominal (min 27.4 Vdc), 0.81 A dc, with inherent soft-start functionality
  • Processor Architecture: Shared Mark VIe processor board featuring a fast CPU with Flash and RAM, hardware reset circuit, and watchdog timer
  • Diagnostics: Onboard internal temperature sensor, LED status indicators for visual diagnostics, and electronic ID reading capabilities
  • Configuration Software: GE ToolboxST / ControlST
  • Hazardous Location Certification: Approved for Class I, Div. 2, Groups A, B, C, D, T4 and Class I, Zone 2, AEx nA nC [nC] IIC T4
  • Operating Temperature: -30°C to +65°C (-22°F to +149°F)

Key Features and Advantages

  • Hazardous Location Approval: The IS220PDIOH1B and its associated terminal board combinations are certified for use in hazardous locations, making it ideal for oil & gas, chemical, and other explosive atmosphere applications.
  • Expanded Terminal Board Compatibility: Unlike its predecessor (H1A), the H1B revision supports a wider range of terminal boards, including ISx0yTDBSH2A, ISx0yTDBSH8A, ISx0yTDBTH2A, and ISx0yTDBTH8A, offering greater flexibility in system design.
  • Integrated I/O Functionality: Combines discrete input acquisition, relay output control, and contact wetting outputs into a single, space-efficient package, reducing hardware footprint and simplifying system architecture.
  • Flexible Redundancy & Control Modes: Supports Simplex (single pack), Dual (two packs), and TMR (Triple Modular Redundant – three packs) configurations, allowing engineers to tailor system reliability to critical process requirements.
  • Robust Ethernet Connectivity: Features two independent 10/100 Mbps Ethernet ports, enabling redundant network topologies (IONet) for uninterrupted communication with the Mark VIe controller.
  • Advanced Power Protection: Equipped with a current limiter and soft-start functionality on the power input connector, which regulates current surges during power application, eliminating the need to power down the system before inserting the power cable.
  • Comprehensive Self-Diagnostics: Continuous monitoring via an internal temperature sensor, watchdog timer, and LED indicators ensures immediate detection of hardware faults, thermal issues, or communication failures.
  • Seamless Terminal Board Integration: Directly mates with compatible Mark VIe terminal boards via a DC-62 connector, establishing a secure electrical chain for discrete signals and relay outputs.
  • Hot-Swap Capability: Designed for online replacement and maintenance, minimizing system downtime during troubleshooting or hardware upgrades.

Application Scenarios

  • Gas Turbine Control Systems: Managing discrete status signals (e.g., breaker positions, valve limits, flame detection) and controlling auxiliary relays in GE Speedtronic Mark VIe gas turbine control applications.
  • Hazardous Location Installations: Deploying in oil & gas processing facilities, refineries, and chemical plants where Class I, Div. 2 or Zone 2 certification is required for electrical equipment.
  • Power Generation Plants: Providing discrete I/O for steam turbine control, generator protection, and balance-of-plant monitoring in utility and industrial power generation.
  • Redundant Control Architectures: Deploying in TMR or Dual redundant configurations for mission-critical processes where zero-downtime and fault tolerance are paramount.
  • Legacy System Retrofit: Replacing older Mark VI or Mark VIe I/O packs in existing turbine control systems, benefiting from expanded terminal board compatibility and hazardous location certification.

IS220PDIOH1B

Compatible Terminal Boards
The IS220PDIOH1B is designed to mate directly with specific Mark VIe terminal boards, offering expanded compatibility over the H1A revision:

  • ISx0yTDBSH2A: Discrete Contact Input/Output Terminal Board for Simplex PDIO applications.
  • ISx0yTDBSH8A: Discrete Contact Input/Output Terminal Board with contact wetting outputs for Simplex PDIO applications.
  • ISx0yTDBTH2A: Discrete Contact Input/Output Terminal Board for TMR PDIO applications.
  • ISx0yTDBTH8A: Discrete Contact Input/Output Terminal Board with contact wetting outputs for TMR PDIO applications.

Related Product Recommendations
For comprehensive Mark VIe system integration, consider the following compatible GE Vernova products:

  1. IS220PDIAH1B: Standalone Discrete Input Pack for applications requiring only input signal acquisition.
  2. IS220PDOAH1A / IS220PDOAH1B: Standalone Discrete Output Pack for applications requiring only relay output control.
  3. IS220PDIOH1A: Previous generation PDIO pack with more limited terminal board compatibility (TDBS/TDBT only).
  4. GE ToolboxST / ControlST Software: The standard engineering tool used for configuring, monitoring, and troubleshooting Mark VIe I/O packs and controllers.
  5. Mark VIe Controllers (e.g., UCSC, UCCS): The central processing units that communicate with the IS220PDIOH1B over the IONet Ethernet network.

Frequently Asked Questions (FAQ)

  • Q: What is the difference between the and the IS220PDIOH1A?
    A: The is an updated revision that expands compatibility with additional terminal boards (TDBSH2A, TDBSH8A, TDBTH2A, TDBTH8A) and carries hazardous location certifications (Class I, Div. 2 / Zone 2). The IS220PDIOH1A (H1A) is limited to TDBS and TDBT terminal boards and may not carry the same hazardous location approvals.
  • Q: What hazardous location certifications does the carry?
    A: The is approved for Class I, Div. 2, Groups A, B, C, D, T4 and Class I, Zone 2, AEx nA nC [nC] IIC T4, Ex nA nL [nL] IIC T4 Gc X, and Ex ic nA [ic] IIC T4 Gc, making it suitable for use in explosive atmospheres.
  • Q: How many inputs and outputs does the support?
    A: The module can accept up to 24 discrete contact inputs (0 to 32 Vdc) and manage up to 12 relay outputs (32 Vdc, 3.15 A dc). It also provides contact wetting outputs (31-32 Vdc, 10-110 mA dc) depending on the connected terminal board.
  • Q: Does the support redundant networking?
    A: Yes. It features two independent 10/100 Mbps RJ45 Ethernet ports, allowing it to be connected to redundant IONet networks for high-availability applications.
  • Q: Can the be used in TMR (Triple Modular Redundant) applications?
    A: Yes. Three packs can be installed on a TDBT-series terminal board (e.g., ISx0yTDBTH2A or ISx0yTDBTH8A) to establish a TMR configuration, providing the highest level of fault tolerance for critical control loops.
  • Q: What software is used to configure the ?
    A: The module is configured using GE’s ToolboxST or ControlST software, which allows engineers to set I/O parameters, monitor diagnostics, and manage the Mark VIe control system.
  • Q: What is the operating temperature range of the ?
    A: The module is rated for operation in ambient temperatures from -30°C to +65°C (-22°F to +149°F).

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