The GE IS220PDOAH1A is a key component within the GE Mark VIe Distributed Control System (DCS). Specifically, it's a Discrete Output I/O Pack designed to control various discrete (on/off) devices in an industrial plant.

Product Description

The IS220PDOAH1A is an I/O (Input/Output) pack that's part of GE's advanced Mark VIe control system. Its primary function is to switch discrete outputs ON or OFF based on commands from the control system. Discrete outputs are typically binary signals used to activate or deactivate field devices.

This I/O pack typically features:

• A processor board: Common to all Mark VIe distributed I/O packs, responsible for communication and fundamental processing.
• An acquisition board: Specific to the discrete output function, designed to reliably drive output contacts.

The IS220PDOAH1A usually provides 12 relay outputs with status feedback. It connects to the control system via dual RJ45 Ethernet connectors for redundant network communication and has a multi-pin connector (often a DC-37) for connecting to an associated terminal board. These terminal boards (such as IS200TRLYH2E, IS200TRLYH3E, IS200TRLYH1F, IS200TRLYH2F) are where the actual wiring to the field devices is made. The module is also certified for use in hazardous environments, making it suitable for demanding industrial applications. The "A" at the end of the part number denotes a specific hardware revision.

Product Specifications

• Manufacturer: GE (General Electric)
• Model: IS220PDOAH1A
• Series: Mark VIe
• Product Type: Discrete Output I/O Pack / Module (Proportional Digital Output Module)
• Output Channels: Typically 12 relay outputs with status feedback.
• Output Fuses: Often equipped with 12 fuses, e.g., 250V, 15A.
• Nominal Output Voltage (typical): 125 VDC (can vary based on configuration and associated terminal board).
• Communication Interface: Dual RJ45 Ethernet ports (10BaseT/100BaseTX) for redundant network connections.
• Field Wiring Connection: Multi-pin connector (e.g., DC-37) for interface with a terminal board (e.g., IS200TRLYH2E, IS200TRLYH3E, IS200TRLYH1F, IS200TRLYH2F).
• Operating Temperature: -30°C to +65°C.
• Certifications: UL Listed for both non-hazardous and hazardous environments (various Class and Zone UL markings may apply).
• Internal Microprocessor: May have an Intel Celeron 300 MHz processor (for the I/O pack's internal processing, not for the main controller).
• Memory: May include 128 MB of flash memory.

Product Application Cases

The GE IS220PDOAH1A is fundamental in large-scale industrial applications where the control system needs to activate or deactivate various discrete field devices, ensuring precise operation and safety.

• Turbine Control Systems: A primary use for the Mark VIe system is in controlling and protecting gas and steam turbines in power generation plants. The IS220PDOAH1A sends discrete commands to:
• Open/close critical valves (e.g., fuel valves, steam valves).
• Start/stop auxiliary motors and pumps.
• Activate circuit breakers for generator synchronization or protection.
• Control cooling fans or lubrication systems.
• Trigger alarm annunciators or warning lights.
• Balance of Plant (BOP) Control: In power plants and other large industrial facilities, it manages outputs for auxiliary systems like cooling water, fuel delivery, and pollution control equipment.
• Oil & Gas Industry: In refineries, pipelines, and offshore platforms, it controls pumps, compressors, motor-operated valves, and emergency shutdown (ESD) actuators.
• Process Industries (e.g., Chemical, Pulp & Paper): Used to activate and deactivate various process equipment, control solenoids for pneumatic or hydraulic systems, and manage batch sequences.
• Safety Systems: While not a dedicated safety controller, it often provides output control for non-safety-instrumented functions or signals within larger safety-related systems, ensuring that protective actions are executed reliably.

The IS220PDOAH1A's ability to reliably send discrete commands and receive status feedback over a redundant Ethernet network makes it an indispensable component for automating, controlling, and protecting critical industrial assets.

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Mark_Vle_Programmable_Controller_System_DEMKO_12_ATEX_1114875X_Rev._14.pdf

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Product Number:  IS220PDOAH1A Discrete Output I/O Pack

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