GE IS220PDIOH1B Discrete I/O Pack

Technical Specifications

Model: IS220PDIOH1B

Part Number: IS220PDIOH1B，336A5026ADP6

Brand: GE（GE Vernova）

Product Type: Discrete digital input‑output I/O pack

Matching System: GE Speedtronic Mark VIe / Mark VIeS distributed turbine control system, matched with TDBS / TDBT terminal boards

Power Supply:24VDC auxiliary power supply, working voltage 22.5‑28.5VDC

I/O Channel:24 configurable discrete channels, support digital input and sinking transistor output

Input Signal:18‑32VDC wet contact discrete input

Output Signal:Sinking transistor output, max 100mA per channel

Isolation:Channel‑to‑channel, channel‑to‑backplane 500V RMS galvanic isolation

Communication:Dual‑port 10/100Mbps IONet redundant Ethernet interface, built‑in local processor

Diagnostic:On‑board self‑diagnostic function, front‑panel LED indicators for power, link and channel fault

Installation:Mark VIe rack plug‑in installation, hot‑swap supported

Redundancy Mode:Support simplex, dual and TMR triple‑modular redundant configuration

Operating Temperature:‑40℃ ~ +70℃, non‑condensing

Protection Class:IP20

Weight:0.82kg

Dimension:159mm ×108mm ×30mm

Compatible System:Gas‑steam turbine, generator unit, combined‑cycle power plant control cabinet

Core Function

Discrete I/O pack for Mark VIe turbine control system. It collects field switch status, interlock and trip discrete signals, and outputs switching control signals for valves, relays and actuators. Equipped with local processor for on‑site signal pre‑processing, transmits data to main controller via dual‑port IONet redundant Ethernet. It undertakes sequence logic, safety interlock and emergency trip signal processing for turbo‑generator unit under simplex or TMR redundant architecture.

Product Details

The IS220PDIOH1B (336A5026ADP6) is PDIO series discrete I/O pack for GE Speedtronic Mark VIe distributed turbine control system.

This compact hot‑swappable I/O pack is installed in Mark VIe standard expansion rack and works with supporting TDBS / TDBT signal terminal boards for field discrete signal wiring. It receives wet‑contact on‑off signals from limit switches, interlock relays and field sensors; meanwhile outputs transistor drive signals to control field actuators and relay loops. Built‑in independent local processor realizes local signal acquisition and pre‑processing, reducing main controller computing load. Dual‑port IONet redundant Ethernet greatly improves communication reliability between I/O pack and main controller. Comprehensive self‑diagnostic function monitors channel over‑current, open‑circuit and abnormal status in real‑time, and feeds back fault information through front‑panel LED indicators for fast on‑site troubleshooting. Channel‑level galvanic isolation effectively suppresses ground loop interference from field site. Conformal coated circuit board improves anti‑vibration, moisture‑proof and anti‑electromagnetic‑interference performance, adapts to harsh working environment of power‑plant turbine hall. Module supports automatic configuration after hot‑swap replacement and shortens equipment maintenance downtime.

It belongs to general‑purpose discrete signal processing spare‑part for Mark VIe turbine control system, widely used in overhaul and renovation projects of gas‑steam turbo‑generator units.

It is important spare hardware for discrete logic loop debugging and defective IS220PDIOH1B pack replacement.