GE Mark VI IS400TDBTH6AEF Discrete Simplex Board

Product Information

The IS400TDBTH6AEF Discrete Simplex Board belongs to the GE Mark VI turbine control hardware family. As a discrete‑signal interface card, it undertakes field switch‑signal conditioning, circuit isolation and signal forwarding tasks. It transmits field dry‑contact signals to the Mark VI main control unit and builds signal links for unit interlock and status feedback. Featuring a simplex non‑redundant architecture, the IS400TDBTH6AEF fits auxiliary control loops where triple‑module redundancy is not required. 

It is widely adopted for control‑system retrofits and spare‑part replacement for gas and steam turbines, and frequently used for system maintenance of existing power plants and petrochemical power facilities. The board connects to the main control rack via high‑speed backplane connectors, while front‑end terminal blocks link to field local devices. It acts as a critical intermediate component for discrete‑signal loops within the Mark VI system.

Core Functional Advantages

The IS400TDBTH6AEF provides isolation and filtering for field switch‑quantity signals, suppressing industrial‑site surge and electromagnetic interference to reduce unexpected signal fluctuation and guarantee stable operation of interlock loops. Built‑in hardware status monitoring enables fast faulty‑channel localization and shortens on‑site troubleshooting time. The simplex‑architecture delivers compact hardware with low rack‑slot consumption, suitable for deployment within non‑safety‑grade auxiliary loops. Its signal response speed meets the timing requirements of turbine‑unit sequence‑control logic, and it accepts signals from limit switches, relay contacts, local push‑buttons and other passive field devices. Its hardware circuits have been validated under long‑term field conditions, supporting 24‑hour continuous operation for energy‑industry applications.

Product Features

Application Fields

Working Principle

Field passive dry‑contact signals are fed into front‑end terminals of the IS400TDBTH6AEF. On‑board filtering and surge‑suppression circuits perform signal conditioning to eliminate field‑line noise. Conditioned discrete signals are transmitted to Mark VI main‑control boards via backplane connectors. The main controller reads point status and executes sequence‑control logic and alarm evaluation. Switch‑quantity output commands issued by the main controller are sent back to IS400TDBTH6AEF through the backplane and driven to field devices via on‑board relay loops. The board continuously collects its own hardware status and uploads diagnostic information to the system. Corresponding panel LEDs activate and system alarms are triggered upon channel damage or power‑supply anomalies. As a simplex‑type board, it contains no hardware‑redundant signal paths, so critical‑protection logic shall not rely on this component.

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Our Supply Advantages

We stock multiple hardware units of GE Mark VI series spare parts including IS400TDBTH6AEF, supporting fast delivery for urgent power‑plant emergency repairs. Pre‑shipment hardware power‑on tests and channel‑function verifications are completed to validate communication and input‑output loop performance before packing. Familiar with Mark VI hardware‑revision differences, we assist customers in verifying full part numbers from field hardware to avoid commissioning failures caused by version mismatch. Export‑oriented packaging with shock‑proof and moisture‑proof protection is provided for long‑distance cross‑border shipment. We deliver spare‑part supplies for domestic and global energy‑sector projects.

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