GE IS400TDBTH2AEF Discrete TMR Terminal Board

GE IS400TDBTH2AEF is a triple modular redundant discrete I/O terminal board for the GE Mark VIe Speedtronic turbine control system. It serves as the physical interface between field digital devices and IS220PDIOH1B I/O packs for turbine safety and control signals.

This terminal board supports 24 VDC discrete signal wiring and adopts TMR architecture to improve system fault tolerance. Equipped with terminal screw blocks for convenient field wiring, it is widely stocked as spare parts for power plant gas and steam turbine control system maintenance.

Main Specifications

• Brand: GE
• Model: IS400TDBTH2AEF
• Product Type: TMR Discrete I/O Terminal Board
• Applicable System: Mark VIe Speedtronic Turbine Control System
• Signal Level: 24 VDC dry/wet contact discrete signals
• Architecture: Triple Modular Redundancy (TMR)
• Interface: Matches IS220PDIOH1B discrete I/O pack
• Terminal screw terminals for easy field wiring connection
• Conformal coated PCB for anti-humidity and anti-corrosion
• Operating Temperature Range: -30°C ~ +65°C

Core Functions

• Realize signal transmission between field switches, valve feedback and PDIO I/O packs
• Provide physical wiring terminals for all digital input and output control loops
• Support triple redundant signal routing to enhance the reliability of turbine protection logic
• Isolate field wiring circuit to avoid surge interference damaging internal control modules
• Facilitate on-site wiring inspection, troubleshooting and signal testing work
• Compact plate structure saves installation space inside the turbine control cabinet
• Static protection design reduces circuit board damage risk during maintenance replacement
• Work cooperatively with PDIO packs to complete turbine interlock and trip signal collection
• Support long-term continuous stable operation in power plant control cabinet environment
• Serve as standard wiring accessory for Mark VIe turbine control system configuration

Application Scenarios

• Thermal power plant GE Mark VIe gas turbine control racks
• Steam turbine safety protection and auxiliary interlock control systems
• Combined cycle power unit automation control cabinets
• Oil & gas industry large compressor and turbine control equipment
• Biomass and waste-to-energy power generation unit control systems
• Industrial power plant auxiliary machinery safety interlock racks
• LNG power generation turbine monitoring and control cabinets
• Energy storage power station turbine protection automation equipment
• Overhaul, retrofit and spare parts replacement of Mark VIe control systems
• GE turbine control terminal board spare parts inventory and field service projects