GE IS200STCIH6AED Simplex Contact Input Terminal Board

Technical Specifications

Model: IS200STCIH6AED

Part Number: IS200STCIH6AED，MRP683036

Brand: GE（GE Vernova）

Product Type: STCI simplex contact input terminal board

Matching System: GE Speedtronic Mark VIe turbine control system, cooperate with PDIA I/O processor

Power Supply:24VDC wetting voltage

Input Channels:24‑channel independent dry‑contact discrete input, divided into 3 isolation groups, 8 channels per group

Per‑channel Current:3‑5mA while contact closed

Isolation:Optical group‑to‑group galvanic isolation

Protection Circuit:Built‑in surge suppression and EMI noise filter, PTC resettable fuse

Indicator:Per‑channel status LED indicator

Connector:Removable euro‑style terminal blocks, rear‑board high‑density connector

Installation:Mark VIe control rack plug‑in installation

Operating Temperature:‑30℃ ~ +65℃, non‑condensing

Protection Class:IP20

Weight:0.40kg

Dimension:240mm ×162mm ×31mm

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

Core Function：STCI simplex contact input termination board for Mark VIe turbine control system. It receives dry‑contact status signals from field limit switches, pressure switches and protective relays. Completes signal filtering, surge suppression and optical isolation, transmits conditioned discrete signals to PDIA I/O processor. Realizes turbine interlock protection, trip logic and high‑precision SOE sequence‑of‑event recording. Applicable for simplex system architecture, supports overall dual and TMR redundant system configuration.

Product Details

The IS200STCIH6AED (MRP683036) is STCI series simplex dry‑contact input terminal board for GE Mark VIe Speedtronic turbine control system.

This plug‑in board is installed inside Mark VIe standard control rack, equipped with detachable euro‑style terminal blocks for field switch device wiring. 24 input channels are divided into three optical isolation groups to reduce crosstalk between signal loops. Each channel integrates surge‑suppression and EMI filter circuits together with PTC resettable fuse, restraining voltage spike and high‑frequency interference from field side, providing stable wetting voltage for dry‑contact signals. Channel‑by‑channel LED status indicator facilitates on‑site maintenance and fault checking. It transfers contact state signals to PDIA I/O processor for logic calculation, provides reliable switch‑state data for turbine safety protection, interlock and SOE event recording function.

Conformal coated circuit board enhances anti‑vibration and anti‑interference performance, adapts to harsh electromagnetic environment of power‑plant turbine hall, meets industrial certification requirements.

It belongs to important discrete signal termination 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 IS200STCIH6AED board replacement.