General Electric IS220PDIOH1A Discrete Input/Output Module

Overview

The General Electric IS220PDIOH1A Discrete Input/Output Module supports Multilin and Mark VIe control systems with accurate digital signal handling and robust communication capability. This module links one or two I/O Ethernet networks to a discrete terminal board, combining the functions of PDIA and PDOA packs for efficient integration in simplex and TMR architectures.

Functional Design

The GE IS220PDIOH1A includes a shared processor board used across Mark VIe packs and an acquisition board dedicated to discrete I/O processing. Dual RJ45 Ethernet ports manage network communication, while a three‑pin power connector and a DC‑62 terminal interface support field wiring. The module handles up to 24 contact inputs and 12 relay outputs, and it receives board‑specific feedback signals for precise control.

Onboard LEDs provide clear diagnostic visibility, and an infrared port supports local serial communication. The IS220PDIOH1A incorporates soft‑start circuitry, RFI/EMI protection, and redundant Ethernet paths that maintain performance during network disturbances. Auto‑negotiation between 10/100 Mb/s modes enhances flexibility in modern industrial environments.

Technical Specifications

Key Parameters

Additional Technical Notes

• The IS220PDIOH1A supports discrete signal conditioning for high‑reliability automation.

• Opto‑isolated inputs improve noise immunity in electrically harsh environments.

• Redundant Ethernet paths maintain communication stability during network faults.

• The module integrates seamlessly with Multilin and Mark VIe terminal boards.

Applications and Compatibility

The General Electric IS220PDIOH1A supports gas turbine, steam turbine, and industrial automation systems that require dependable digital I/O processing. It fits both simplex and TMR architectures and connects directly to discrete terminal boards used in Multilin and Mark VIe installations. Its rugged design suits power generation, petrochemical, and heavy‑industry environments.