GE IS220PDOAH1A Discrete Output Module

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The GE IS220PDOAH1A is a high-performance Discrete Output Module designed for use within the GE Mark VIe control system. It delivers precise digital output control for a wide range of industrial processes, offering reliable operation in harsh environments. This module ensures accurate actuation of field devices such as relays, solenoids, and contactors while maintaining full system diagnostics and fault detection.

Key advantages include:

• High-Speed Switching: Enables rapid response for critical control signals.

• Advanced Diagnostics: Built-in monitoring for short circuits, open loads, and channel status.

• Redundant Architecture Compatibility: Can be used in simplex or redundant configurations for system reliability.

• Industrial-Grade Protection: Resistant to vibration, temperature fluctuations, and electrical noise.

• Plug-and-Play Integration: Fully compatible with GE Mark VIe and Mark VIeS I/O networks.

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Overview

The IS220PDOAH1A module operates as part of the GE I/O pack family, providing discrete (on/off) output capabilities in distributed control systems. It connects directly to terminal boards that interface with external field devices. Communication and power are handled through Ethernet-based connections, ensuring high data integrity and synchronization with the system controller.

The module is built using surface-mount technology (SMT) on a multilayer PCB, enhancing signal integrity and reducing heat generation. Its compact, modular design allows for easy replacement and scalability within control cabinets.

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Technical Parameters 

The IS220PDOAH1A module operates on a 24 V DC nominal supply, drawing minimal current while supporting up to 12 isolated digital output channels. Each channel is capable of sourcing or sinking current depending on configuration.

• Output Type: Digital (Discrete) Output

• Voltage Range: 18–32 V DC

• Output Channels: 12 individually isolated channels

• Load Capacity: 0.5 A per channel (max)

• Response Time: < 2 ms per channel

• Communication Interface: Ethernet (dual RJ-45 ports) for Mark VIe I/O network

• Operating Temperature: –30°C to +65°C

• Storage Temperature: –40°C to +85°C

• Mounting Method: Plug-in to I/O terminal base (typically PDIO or IS200STCIH2A base)

• Protection: Built-in transient suppression and fault isolation circuitry

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Structure & Composition

The IS220PDOAH1A is composed of:

• Main logic board: Handles channel control, communication, and diagnostics.

• Ethernet interface section: Dual-port switch for redundant network connection.

• Status LEDs: Indicate channel operation, fault conditions, and network status.

• Protective casing: Rigid industrial housing designed for quick insertion/removal from the terminal base.

• Firmware storage unit: Flash memory for module firmware and configuration data.

The board’s modular layout allows it to be hot-swapped (in certain configurations) without disrupting other I/O packs in the system.

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Applications

The GE IS220PDOAH1A is used in a wide variety of industrial control and automation applications, including:

• Gas and Steam Turbine Control Systems

• Compressor and Pump Control Units

• Balance of Plant (BoP) Automation

• Oil & Gas Processing Facilities

• Power Generation and Distribution Systems

• Chemical and Petrochemical Process Control

It is particularly suited for situations requiring reliable and deterministic output control where precision timing and fail-safe operation are critical.

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Installation & Maintenance

Installation:

1. Mount the corresponding terminal base securely within the control cabinet.

2. Align the IS220PDOAH1A module with the base connector and insert until locked.

3. Connect Ethernet cables to the dual ports for network redundancy.

4. Power up the system and verify LED indicators for proper operation.

Maintenance:

• Periodically inspect connectors for dust or corrosion.

• Verify firmware versions using GE ToolboxST or related configuration tools.

• Replace modules only when powered down unless hot-swap operation is supported in your configuration.

• Store spare modules in antistatic packaging.

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Additional Information

The GE IS220PDOAH1A complies with CE, UL, and IEC industrial standards for electrical safety and electromagnetic compatibility. Its design supports field calibration and configuration via Ethernet, simplifying commissioning and service operations.

Each module undergoes rigorous GE testing for thermal endurance, EMC performance, and long-term reliability, ensuring it performs flawlessly in mission-critical applications.