GE IS220PDIAH1A 336A4940CSP1 Discrete Input Module

1. Key Features

The GE IS220PDIAH1A 336A4940CSP1 is a high-performance Discrete Input Module designed for GE Mark VIe control systems, part of the renowned GE Energy family of turbine and industrial automation solutions.
Engineered for rugged environments and high signal integrity, this module captures and conditions digital input signals from field devices, enabling precise and reliable control operations.

Highlight features include:

• High-Speed Input Processing: Capable of reading multiple discrete signals simultaneously with minimal delay.

• Advanced Noise Filtering: Integrated filtering circuits reduce electrical noise and false triggering.

• Optical Isolation: Channel-to-system isolation enhances safety and protects against voltage surges.

• Hot-Swappable Design: Allows module replacement without system power-down, minimizing downtime.

• Integrated Diagnostics: Built-in LED indicators and self-check functions for quick fault detection.

• Network-Ready: Seamlessly integrates with Mark VIe’s Ethernet-based control architecture.

• Compact & Durable: Designed with industrial-grade materials for vibration, heat, and EMI resistance.

  
  

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2. Application Fields

The IS220PDIAH1A plays a vital role in data acquisition and discrete signal monitoring within GE’s Mark VIe distributed control systems (DCS).
It is widely implemented in the following sectors:

• Gas and Steam Turbine Control Systems – for valve status, limit switches, and safety interlocks.

• Power Generation Plants – monitoring circuit breakers, relays, and protective equipment.

• Oil and Gas Facilities – input signal processing for pumps, compressors, and emergency systems.

• Process Automation – used in refineries, chemical plants, and water treatment systems.

• Marine and Energy Infrastructure – reliable performance in high-vibration and high-temperature environments.

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3. Technical Overview

The GE IS220PDIAH1A interfaces directly with the Mark VIe I/O network, converting discrete input signals into data packets that are transmitted over Ethernet to the controller.
Each module communicates with its associated I/O pack (PDIA) that performs signal conditioning, diagnostics, and time stamping.

The module’s optically isolated input channels ensure that field devices are electrically separated from the control electronics, preventing back-feed or damage due to field faults.
Its intelligent design also supports redundant communication paths, enhancing reliability in critical turbine and process applications.

The 336A4940CSP1 part code identifies specific hardware configuration and manufacturing batch, ensuring compatibility with designated Mark VIe components.

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4. Specifications (Descriptive Format)

The IS220PDIAH1A features 24 discrete input channels, each capable of detecting ON/OFF states from field switches, contacts, or sensors.
It operates on a 28 VDC nominal supply (with a tolerance of ±10%) and supports input thresholds compatible with industrial logic levels.
Response time is typically less than 5 milliseconds per channel, ensuring fast and accurate signal detection.

The operating temperature range extends from –30°C to +65°C, making it suitable for outdoor or high-temperature control panels.
The module mounts directly on a DIN rail or panel, depending on the control cabinet layout.
Weight is approximately 0.45 kg, allowing easy installation in compact enclosures.
The device connects via Mark VIe Ethernet-based I/O network ports, supporting dual redundant communication where required.

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5. Structure and Components

The IS220PDIAH1A consists of:

• A main input board with isolated input channels and filtering circuits.

• A metal shielded housing to prevent EMI interference.

• LED indicators for power, communication, and channel activity.

• A PDIA I/O pack interface connector for direct connection to the control network.

• High-reliability connectors for field wiring and power inputs.

This modular construction simplifies service and replacement while maintaining consistent performance.

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6. Installation and Maintenance

• Installation: Mount the module on a flat surface or DIN rail. Connect field inputs using shielded cables and follow GE grounding guidelines.

• Commissioning: Verify I/O channel mapping in the Mark VIe configuration software before energizing the system.

• Maintenance: Regularly inspect wiring terminals and clean ventilation areas to prevent dust accumulation.

• Firmware Updates: Recommended through GE ControlST softwar