IS220PDIAH1A, REV D – Discrete Contact Input Terminal Board

The IS220PDIAH1A, REV D is a discrete contact input terminal board designed for use within the GE Mark VIe control platform. It serves as a vital interface between field devices and the turbine controller, processing on/off signals from switches, push buttons, pressure contacts, limit sensors, and other discrete inputs used in power generation and industrial automation.

This module is engineered to provide high signal integrity through channel-to-channel galvanic isolation, protecting the system against electrical noise, spikes, and interference typically found in turbine environments. By ensuring reliable data acquisition, it contributes to accurate turbine control, plant safety, and operational continuity.

The IS220PDIAH1A REV D features diagnostic LED indicators for each input channel, enabling quick identification of signal states and fault conditions. Its hot-swappable design allows maintenance teams to replace or service the module without shutting down the entire system, significantly reducing downtime.

Built with rugged industrial-grade materials, this terminal board can withstand high vibration, thermal stress, and electrical interference, making it suitable for gas turbines, steam turbines, combined-cycle plants, and heavy industrial applications. The board integrates seamlessly with GE Mark VIe I/O packs and controllers, supporting both simplex and redundant architectures for maximum reliability.

By combining real-time signal acquisition, robust diagnostics, and durable construction, the IS220PDIAH1A, REV D is a trusted solution for ensuring safety, control accuracy, and efficiency in demanding turbine control and automation environments.

Key Features:

• Designed for GE Mark VIe turbine control systems

• Supports multiple discrete contact input channels

• Provides channel-to-channel isolation for noise-free performance

• Real-time acquisition of on/off signals from switches and sensors

• Equipped with LED indicators for diagnostics and status monitoring

• Hot-swappable and field-replaceable design

• Built-in fault detection and self-diagnostics

• Rugged construction for harsh industrial environments

• Compatible with simplex and redundant architectures

• Enhances turbine safety and operational reliability

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