GE IS230TNCIH4C Thermocouple Input Terminal Board

Technical Specifications

Model: IS230TNCIH4C

Part Number: IS230TNCIH4C

Brand: GE（GE Vernova）

Product Type: Thermocouple input terminal board

Matching System: GE Speedtronic Mark VIe turbine control system

Power Supply: 24VDC

Input Channels:16‑channel isolated thermocouple input

Supported Thermocouple Types: J, K, T, E, R, S, B, software configurable per channel

Cold‑junction Compensation: Built‑in high‑precision semiconductor cold junction compensation

Isolation: Channel‑to‑channel, field‑to‑backplane galvanic isolation

Resolution: 0.1℃ typical

Installation: Plug‑in installation for Mark VIe I/O chassis

Operating Temperature:‑20℃ ~ +70℃, non‑condensing

Protection Class:IP20

Weight:0.80kg

Dimension:228mm ×148mm ×55mm

Compatible System: Power plant gas‑steam turbine control cabinet

Core Function: Dedicated thermocouple signal terminal board for Mark VIe turbine control system. It collects temperature signals from field thermocouple sensors of turbine casing, flue gas and pipeline, completes cold‑junction compensation, signal isolation and filtering, transmits processed temperature data to I/O processor, realizes real‑time temperature monitoring, over‑temperature protection and fault alarm for turbo‑generator units. Supports simplex, dual and TMR redundant system architectures.

Product Details

The IS230TNCIH4C is 16‑channel isolated thermocouple input terminal board for GE Mark VIe Speedtronic turbine control system.

This plug‑in board is installed inside Mark VIe standard I/O chassis. It receives millivolt thermocouple signals from field temperature sensors, supports multiple common thermocouple types, each channel can be independently configured by software. Built‑in high‑precision cold‑junction compensation function effectively eliminates measurement error caused by terminal temperature change. After isolation and filtering processing, valid temperature data is sent to the I/O processor for conversion and calculation, providing reliable temperature process data for turbine monitoring and protection logic.

It has complete channel self‑diagnosis function, can detect thermocouple open‑circuit, short‑circuit and signal abnormality, and upload fault alarm information to turbine controller. Conformal coated circuit board improves anti‑vibration and anti‑interference performance, adapts to harsh electromagnetic and vibration environment of power‑plant turbine hall.

It belongs to key spare‑part for Mark VIe turbine control system maintenance, applicable to simplex, dual and TMR redundant configurations, widely used in overhaul and renovation projects of gas‑steam turbine generating units.

It is important spare hardware for turbine thermocouple temperature measuring loop debugging and defective IS230TNCIH4C board replacement.