GE IS220PAICH1A (Part No. 336A4940CSP3) Analog I/O Pack

1. Introduction

The GE IS220PAICH1A is an Analog Input/Output (I/O) Pack from the GE Mark VIe control system family. Designed for turbine and process control applications, this module provides precise analog signal processing and communication between field devices and the control network. It integrates signal conditioning, conversion, and Ethernet-based communication into a compact and robust module, ensuring reliability, accuracy, and scalability in demanding industrial environments.

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2. Technical Specifications 

The IS220PAICH1A supports 8 analog input channels and 8 analog output channels, configurable for different signal types such as 4–20 mA, 0–10 V, and ±10 V. The inputs are differential and galvanically isolated, minimizing noise interference and ensuring stable signal integrity.

Each analog input offers 16-bit resolution for high-precision measurement, while the outputs provide smooth, linear analog signals for actuator control. The pack communicates through a dual redundant Ethernet interface (10/100 Mbps) using GE’s proprietary IONet protocol, ensuring fast and reliable data transfer to the Mark VIe controller.

The module operates from a 28 V DC nominal power supply, consuming approximately 8 W, and functions effectively in ambient temperatures ranging from –30°C to +65°C. Built-in self-diagnostics continuously monitor input quality, network communication, and internal electronics for early fault detection.

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3. Structure and Components

The IS220PAICH1A consists of:

• A main processing board with analog-to-digital and digital-to-analog converters

• Ethernet communication ports for redundant network connectivity

• Terminal board interface for field wiring (typically paired with a PTUR or PAIC terminal board)

• Status LEDs on the front face for power, network, and diagnostic indication

Its modular design allows the pack to be easily replaced or upgraded without affecting system cabling—supporting hot-swap replacement within the Mark VIe framework.

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4. Key Features

• Eight analog input and eight analog output channels

• 16-bit resolution for both inputs and outputs

• Configurable signal ranges (current or voltage modes)

• Dual redundant Ethernet ports for high network reliability

• Built-in diagnostic and health monitoring functions

• Galvanic isolation between channels and system ground

• Compact, field-replaceable design for reduced downtime

• Full compatibility with GE Mark VIe controllers and I/O networks

  
  

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5. Application Fields

The GE IS220PAICH1A (336A4940CSP3) is widely applied in:

• Gas and steam turbine control systems

• Power generation and distribution automation

• Process industries (oil, gas, chemical, and petrochemical)

• Manufacturing automation and machinery control

• Water and wastewater process regulation

• Renewable energy systems requiring analog signal management

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6. Installation and Maintenance

• Mount the I/O pack on the designated Mark VIe I/O rack or terminal board.

• Connect redundant Ethernet cables for high availability communication.

• Ensure all analog input/output channels are properly shielded to prevent signal interference.

• Maintain clean and ventilated conditions around the control cabinet.

• Regularly inspect LED indicators for fault or communication errors.

• The unit supports hot-swapping, allowing replacement during operation without system interruption.

• Use GE’s ToolboxST software for configuration, calibration, and diagnostics.

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7. Operational Advantages

The GE IS220PAICH1A336A4940CSP3 delivers a powerful combination of precision, reliability, and flexibility for industrial control systems. Its dual Ethernet communication and modular design ensure continuous operation and easy maintenance, while advanced diagnostics enhance system availability. The result is a stable and scalable solution for critical control applications within the GE Mark VIe ecosystem.