GE I/O Pack serves as an intelligent, distributed I/O interface unit within the GE Mark VI/VIe Speedtronic system. Its primary function is to act as a signal bridge between the controller and field devices, handling signal acquisition, conditioning, isolation, and the execution of output commands. Communicating with the controller via high-speed Ethernet, it ensures the system’s determinism and reliability within demanding industrial environments.

The GE I/O Pack constitutes a complete I/O module—comprising an intelligent I/O station equipped with a local processor, a terminal board, and field wiring—which is installed within the control cabinet. The entire system architecture can be broadly categorized into three distinct layers

First is the Control Layer: Centered primarily around the controller, this layer governs computational decision-making, redundancy synchronization, and overall system management.

Second is the Communication Layer: Utilizing the IONet Ethernet protocol at a speed of 100 Mb/s, this layer facilitates high-speed, deterministic communication and supports single, dual, or triple redundancy configurations.

Third is the Field Layer: Comprising the I/O Pack, terminal boards, and field devices, this layer performs signal acquisition and output, provides electrical isolation, and ensures the localized protection and proper operation of the entire field system.

So, what is the operational workflow of the I/O Pack?

Field sensors and switches transmit signals to the I/O Pack via the terminal board. These signals undergo filtering, isolation, and analog-to-digital conversion to be processed as Analog Inputs (AI) or Digital Inputs (DI). Subsequently, the CPU embedded within the Pack independently executes algorithms, performs self-diagnostics, and conducts fault detection. It then interacts with the controller via IONet to upload acquired data and receive control commands. Finally, these commands are converted—via digital-to-analog conversion within the Pack—into Digital Outputs (DO) or Analog Outputs (AO) to drive field actuators and execute the required actions.

Examples of typical models

Model	Type	Parameters	Application
IS220PDIOH1A	Discrete I/O	24DI + 12DO, dual Ethernet, supports TMR	Gas turbine digital control
IS220PAICH1A	Simulation of I/O	10AI (±10V/0–20mA), 2AO, compatible with IS200STAIH terminal board	Collection of analog quantities such as temperature, pressure and flow rate
IS220PVIBH1A	vibration monitoring	Multi-channel vibration acquisition,100Hz frame rate, equipped with TVBA terminal board	Gas turbine / Compressor Vibration Monitoring and Protection
IS220PDIAH1A	Discrete Input	dual Ethernet	High-reliability switch status monitoring
IS220PDOAH1A	Discrete Output	Relay output, with load monitoring, supports output enable control	Actuator drive (electromagnetic valve, contactor)
IS420YDOAS1B	Digital Output	High-speed switch output, anti-interference, overload / short-circuit protection	Industrial automation actuator control
IS200VAICH1DAA	Analog Input	16-channel isolated AI, with an accuracy of ±0.1%, and supporting differential input	High-precision analog quantity acquisition
IS200STCIH6AED	Digital Input	8.5 – 28VDC input, with high isolation and fault diagnosis	General analog signal acquisition

Terminal matching list

Model Number	Matching Terminal Board	Channel / Feature
IS220PAICH1A	IS200STAIH1A IS200STAIH2A IS200TBAIH1C	4–20mA/±10V, Differential isolation
IS220PAICH1A	Same as 1A
IS220PDIAH1A	IS200STCSIH1A IS200STCSIH2A IS200STCSIH8A IS200TBCIH2C IS200TBCIH4C	24VDC dry contact / active, photoelectric isolation with 4ms filtering
IS220PDIAH1B	Same as 1A	Same as left + Zone 2 Hazard Zone Certification
IS220PDIOH1A	IS200STCIH1A、IS200STCIH6AED IS200TBDOH2C	DI isolation, DO relay with load monitoring, output enable
IS220PDIOH1B		Support TMR triple redundancy
IS220PDOAH1A	IS200TBDOH1C IS200STDOH1A	Short-circuit / Overload protection, redundancy enablement
IS220PVIBH1A	IS200TVBAH1A IS200TVBAH2A	Eddy current probe, 100Hz sampling, vibration protection logic
IS220YAICS1A	IS200STAIS1A、IS400STAIS1A、IS200TBAIS1C

Core Functions and Key Features of I/O PACK Modules

Four Core Functions

1.Standardizes analog and digital signal formats, enabling seamless connectivity between controllers and field devices.

2.Equipped with an onboard CPU and real-time operating system to perform local processing and redundancy voting, thereby reducing the workload on the main controller.

3.Features electrical isolation and robust protection circuitry (against overload, short circuits, and electromagnetic interference) to prevent field-level disturbances from damaging the system.

4.Supports simplex, dual-redundant, and triple-redundant configurations, ensuring fault tolerance for critical systems.

Key Technical Features

Dual 10/100 Mbps Ethernet ports utilizing the IONet protocol; supports deterministic communication over both copper cabling and fiber optics.

Features a local CPU capable of executing algorithms and performing self-diagnostics for fault detection.

Designed to operate within a wide temperature range of -40°C to +70°C; features vibration resistance and an IP20 protection rating, making it ideally suited for rigorous industrial environments.

Supports configuration, diagnostics, parameter downloading, and other functions via the ToolboxST software platform.

Given the significant demand for I/O PACK modules within industrial systems across the Middle East, our company is well-positioned to meet these needs. We maintain ample inventory, possess robust supply chain capabilities, offer competitive pricing, and provide a comprehensive after-sales service system. We warmly welcome inquiries from customers worldwide!