SKU: IS220PDIOH1A

GE IS220PDIOH1A Mark VIe Discrete Input/Output Module

The GE IS220PDIOH1A is a high-performance Mark VIe Discrete I/O module providing 24 contact inputs and 12 relay outputs. Featuring dual Ethernet redundancy and opto-isolation, it ensures reliable digital signal management for gas turbine and DCS applications.

Product Overview

The GE IS220PDIOH1A functions as a core component within the Mark VIe Distributed Control System (DCS), specifically designed for high-reliability gas turbine management. This module bridges the gap between digital I/O Ethernet networks and discrete terminal boards by consolidating the roles of both input (PDIA) and output (PDOA) packs into a single, compact unit. It manages complex signal processing for both simplex and Triple Modular Redundant (TMR) architectures, ensuring continuous operation in critical industrial environments.

By integrating a shared processor board with a specialized acquisition board, the IS220PDIOH1A delivers rapid data conversion and transmission. The hardware design prioritizes system integrity, utilizing onboard intelligence to monitor loop health and provide real-time diagnostic feedback to the central controller.

Technical Specifications

Manufacturer: General Electric (GE)
Product Family: Mark VIe Control System / Multilin Series
Model Number: IS220PDIOH1A
Module Function: Discrete Input and Output (I/O) Pack
Input Capacity: 24 Contact Inputs (Opto-isolated)
Output Capacity: 12 Relay Outputs
Communication: Dual RJ45 Ethernet ports (10/100 MB/s auto-negotiating)
Hardware Interface: DC-62 connector for terminal board linking
Diagnostics: Integrated Status LEDs and Infrared port for local serial access
Power Input: 28V DC (nominal) via 3-pin connector
Weight: 0.38 kg
Dimensions: 6.0 cm x 13.0 cm x 8.3 cm
Country of Origin: USA

Performance Features and Reliability

The IS220PDIOH1A incorporates several advanced engineering features to maintain performance in demanding settings:

Network Redundancy: The module utilizes dual Ethernet ports to support redundant network paths. This configuration prevents signal loss during communication failures, which is vital for maintaining the safety of turbine operations.
Electromagnetic Resilience: Internal RFI and EMI protection circuits shield the module from industrial electrical noise. Consequently, the hardware maintains signal accuracy even when installed near high-voltage equipment.
Intelligent Startup: Integrated soft-start capabilities manage current inrush during power-up. This protection mechanism extends the lifespan of the internal electronics and prevents voltage drops on the local power bus.
Signal Conditioning: Every input undergoes opto-isolation and signal conditioning before processing. This isolation protects the sensitive digital logic from external field surges and ground loops.
Flexible Duplexing: The module supports both full and half-duplex modes at varying speeds. This flexibility allows the IS220PDIOH1A to integrate seamlessly into both legacy and modern Ethernet-based DCS infrastructures