GE IS220PDIOH1A Combined Discrete I/O Pack

Technical Specifications

Model: IS220PDIOH1A

Part Number: IS220PDIOH1A，336A4940CSP23

Brand: GE（GE Vernova）

Product Type: PDIO combined discrete input‑output I/O pack

Matching System: GE Speedtronic Mark VIe distributed turbine control system

Power Supply:24VDC，working range 22.5‑28.5VDC, typical power consumption 3.5W

Input Channels:24‑channel optically isolated dry‑contact discrete input, compatible with 5‑24VDC signal

Output Channels:12‑channel Form‑C relay output, rated 5A@250VAC / 30VDC

Signal Filter:4ms hardware debounce filter for each input channel

Isolation:1500VAC field‑to‑backplane optical galvanic isolation

Communication:Dual‑port 10/100Mbps IONet redundant Ethernet interface

Connector:DC‑37 field I/O connector

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

Operating Temperature:‑20℃ ~ +65℃, non‑condensing

Protection Class:IP20

Weight:0.80kg

Dimension:159mm ×108mm ×30mm

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

Core Function: PDIO combined discrete I/O pack for Mark VIe turbine control system. It collects status signals from field limit switches, pressure switches and protective relay dry‑contacts, and drives on‑site actuators, solenoid valves and trip circuits via relay outputs. Communicates with main controller through dual‑port IONet redundant Ethernet. Supports simplex, dual and TMR triple‑modular redundant architectures, realizes turbine interlock logic, emergency trip output and high‑precision SOE sequence‑of‑event recording function.

Product Details

The IS220PDIOH1A (336A4940CSP23) is PDIO series combined discrete input‑output I/O pack for GE Speedtronic Mark VIe distributed turbine control system.

This hot‑swappable compact I/O pack is installed in Mark VIe standard rack, matched with corresponding terminal board for field signal wiring. 24 optically‑isolated dry‑contact input channels adopt 4ms hardware debounce circuit to filter contact bounce and field‑side high‑frequency interference. 12 groups Form‑C relay outputs can directly drive turbine local trip loops and field executing devices. Dual‑port IONet redundant Ethernet guarantees stable data interaction with main controller, uploads field switch‑state data and executes control commands issued by the system. On‑board multi‑color LED indicators facilitate on‑site status inspection and fault locating.

Conformal coated circuit board improves anti‑vibration and anti‑electromagnetic‑interference performance, adapts to harsh environment of power‑plant turbine hall, meets Class I Div2 hazardous‑area certification requirements.

It belongs to key discrete signal processing 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 I/O loop debugging and defective IS220PDIOH1A pack replacement.