GE IS220PDIOH1A Discrete I/O Pack

Technical Specifications

Model: IS220PDIOH1A

Part Number: IS220PDIOH1A

Brand: GE（GE Vernova）

Product Type: Discrete digital input‑output processing pack

Matching System: GE Speedtronic Mark VIe distributed turbine control system, mate with discrete terminal boards

Power Supply:27.4‑28.6VDC, nominal 28VDC

Channel Configuration:24‑channel isolated digital input,12‑channel C‑form relay output

Isolation:1500V field‑to‑backplane galvanic isolation

Communication:Dual RJ45 100Mbps IONet redundant Ethernet interface

Installation:Mark VIe I/O cabinet plug‑in hot‑swappable pack

Operating Temperature:‑20℃ ~ +60℃, non‑condensing

Protection Class:IP20

Weight:0.40kg

Dimension:159mm ×108mm ×30mm

Compatible System:Power plant gas‑steam turbine, generator unit control cabinet

Core Function:PDIO discrete I/O pack for Mark VIe turbine control system. Cooperates with external discrete terminal boards to collect field switch status, limit switch and equipment feedback signals; outputs relay control commands for valves, solenoid valves and trip circuits. Supports simplex, dual and TMR triple‑modular redundant architectures, completes turbine interlock logic, trip protection and equipment on‑off control.

Product Details

The IS220PDIOH1A is discrete input‑output processing pack for GE Mark VIe Speedtronic distributed turbine control system.

This hot‑swappable I/O pack is plugged into Mark VIe standard I/O cabinet, works with matching discrete terminal boards. It acquires digital feedback signals from field limit switches, pressure switches, equipment status contacts, converts contact signals into digital data for controller logic calculation. Meanwhile, it converts control logic commands into C‑type relay output signals to drive solenoid valves, trip relays and auxiliary field devices. Dual‑port IONet redundant Ethernet ensures reliable real‑time data interaction with main controller.

Built‑in channel self‑diagnosis function, it can detect channel failure and upload fault alarm records. Conformal coated circuit board improves anti‑vibration and anti‑interference performance, adapts to harsh electromagnetic environment of power‑plant turbine hall, satisfies hazardous‑area application requirements.

It belongs to critical discrete signal spare‑part for Mark VIe turbine control system, widely used in overhaul and renovation projects of gas‑steam turbine generating units.

It is important spare hardware for turbine discrete signal loop debugging and defective IS220PDIOH1A pack replacement.