GE IS230TDBTH6A Discrete I/O Terminal Board

Technical Specifications

Model: IS230TDBTH6A

Brand: GE（GE Vernova）

Product Type: Discrete I/O terminal board

Matching System: GE Speedtronic Mark VIe turbine control system

Signal Type: Dry‑contact discrete input signals

Input Excitation: 24VDC nominal

Signal Filter: 4ms hardware filter for contact bounce suppression

Isolation: Channel‑by‑channel optical isolation

Interface: High‑density screw terminal blocks for field wiring

Response Time: Typical 25ms

Indicator: On‑board LED status indicators for channel signal detection

Mounting: Flat panel mounting inside control cabinet

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

Humidity:5%‑95% non‑condensing

Protection Class:IP20

Weight:1.20kg

Dimension:330mm ×178mm ×25mm

Compatible System: Gas turbine, steam turbine, generator control cabinet

Core Function

TDBT discrete I/O terminal board for Mark VIe turbine control system. It serves as physical signal termination interface between field dry‑contact devices and Mark VIe I/O pack modules. It collects auxiliary equipment status, limit switch and relay feedback signals, performs hardware filtering and optical isolation to suppress contact bounce and field electrical noise. It transmits conditioned discrete status signals to main controller, supports simplex and TMR triple‑modular turbine control configuration, guarantees reliable on‑off signal acquisition for turbine interlock and protection logic.

Product Details

The IS230TDBTH6A is TDBT series discrete I/O terminal board for GE Speedtronic Mark VIe turbine control system.

This termination board is installed inside turbine control cabinet, undertaking field wiring connection and signal pre‑processing work. Dry‑contact signals from site limit switches, auxiliary relays and equipment status switches are connected to screw terminal blocks. Built‑in hardware filter eliminates contact bounce interference, and per‑channel optical isolation isolates field noise from internal control circuit, improving signal anti‑interference capability. LED indicators give direct visual feedback for each channel input status, convenient for site wiring check and fault troubleshooting. Conformal coated circuit board improves anti‑vibration, moisture‑proof and anti‑electromagnetic‑interference performance, adapts to harsh environment of power plant turbine cabinet. Widely applied in gas‑steam turbine and generator control cabinets with simplex or TMR redundant configuration.

It belongs to important signal termination spare‑part for Mark VIe turbine control system, widely used in overhaul and renovation projects of power generation units.

It is important spare hardware for discrete signal loop debugging and defective IS230TDBTH6A board replacement.