GE IS230TDBTH6A TDBT Discrete I O Terminal Board For Mark VI Mark VIe TMR Turbine Control System
- Product Code: IS230TDBTH6A
- Availability: In Stock
GE IS230TDBTH6A TDBT Discrete I/O Terminal Board For Mark VI / Mark VIe TMR Turbine Control System
Manufacturer: GE Vernova (GE Speedtronic Turbine Control)
Part Number: IS230TDBTH6A (TDBT high-density discrete contact terminal board, DIN rail mount)
Product Type: Field wiring terminal assembly, matched with IS200 series digital I/O core cards, TMR triple redundant turbine control dedicated terminal base
Matching Platform: GE Mark VI / Mark VIe gas & steam turbine control system, simplex / triple redundant TMR architecture, mate with IS200TDBTH6A logic I/O card
Core Function: 24 group-isolated dry/wet contact digital input channels; support 24/48/125VDC external wetting voltage; 12 Form-C relay discrete output contacts; built-in PTC overcurrent fuses, surge & EMI noise suppression; spring-clamp fast wiring terminals; 2.5kV dielectric isolation between field side and control logic; fault current limiting; compatible with valve limit switches, breaker feedback, emergency trip relays, solenoid valve actuation signals; plug-in connector for quick connection to main I/O card
1. Product Overview
IS230TDBTH6A is the high-performance field terminal board for GE Mark VI/Mark VIe Speedtronic turbine control, serving as the wiring interface between all field discrete contact devices and the IS200TDBTH6A digital I/O logic card installed in the control rack.
It integrates 24 group-isolated digital input circuits for collecting breaker position, valve open/close limit switches, emergency trip buttons, flame detector contacts, interlock auxiliary relay signals; provides 12 Form-C relay outputs to drive field solenoid valves, alarm horns, trip relays and auxiliary indicator lights.
Supports three standard wetting voltage levels (24VDC / 48VDC / 125VDC) for power plant standard field contact signals. Each input channel features independent current limiting, and resettable polymer PTC fuses protect against short-circuit overload without frequent fuse replacement. Multi-stage TVS surge absorption and RC filter circuits eliminate high-frequency electromagnetic interference and contact bounce to avoid false turbine protection trips.
2.5kVrms galvanic isolation separates field high-voltage contact circuits from low-voltage control logic, effectively blocking ground loop interference and protecting the main control card from field surge damage. Spring-clamp terminal blocks support tool-free wiring for 0.2–4.0mm² (24–12AWG) cables, suitable for long-term vibration environments in power plant control rooms.
Adopts standard 35mm DIN rail mounting or panel fixed installation, fully conformal coated PCB for anti-corrosion and moisture resistance. Cannot operate independently; must pair with matching IS200TDBTH6A rack I/O logic card to realize full discrete signal acquisition and output control for gas/steam turbine safety regulation systems.
This terminal board is a critical spare part for thermal power combined-cycle turbine control cabinets, widely used for unit overhaul, discrete channel wiring fault replacement and routine system maintenance.
2. Complete Technical Specifications
• Compatible Control System: Mark VI / Mark VIe triple redundant TMR turbine control rack
• Matching Logic Card: IS200TDBTH6A discrete I/O processor card
• Digital Input: 24 group-isolated contact inputs, wetting voltage 16–145VDC (24/48/125VDC selectable)
• Digital Output: 12 Form-C SPDT relay output contacts, single contact rated 0.5A@24VDC
• Channel Protection: Resettable PTC polymer fuses, per-channel current limiting, surge TVS protection
• Dielectric Isolation: 2500VAC isolation between field terminal and control logic side
• Terminal Type: Spring-clamp quick wiring terminals, wire range 0.2~4.0mm² (24–12AWG)
• Installation: Standard 35mm DIN rail mounting / cabinet panel mounting
• External Wetting Voltage Range: 16–32VDC / 32–64VDC / 100–145VDC three grades
• Operating Temperature: -40℃ ~ +70℃ continuous ventilated cabinet operation
• Storage Temperature: -40℃ ~ +85℃; Relative Humidity: 5% ~ 95% RH non-condensing
• Overall Dimension: 228.6mm(W) × 152.4mm(H) × 50.8mm(D), metal mounting backplate integrated
• PCB Protection: Full IPC-CC-830 anti-corrosion conformal coating, anti-static industrial grade circuit board
• Certifications: UL508, CE, IEC60947-1 industrial safety & EMC certification
3. Core Hardware Advantages
1. 24DI+12DO high-density integrated discrete terminal, single board completes all turbine safety contact signal wiring, greatly simplifies cabinet internal wiring layout
2. Three optional wetting voltage specifications, compatible with all mainstream power plant 24/48/125VDC field contact standards, no need to replace terminal boards for different voltage equipment
3. Resettable PTC self-recovery fuses + multi-stage surge suppression, single channel short circuit will not burn the whole board, reduces maintenance replacement cost
4. 2.5kV high-strength electrical isolation, thoroughly isolates field high-voltage interference, improves overall TMR turbine control system anti-interference safety performance
5. Tool-free spring-clamp terminals + DIN rail quick installation, shortens field wiring and commissioning time, stable connection under long-term vibration environment
4. Typical Application Scenarios
• Combined cycle power plant Mark VIe gas/steam turbine control cabinet critical safety contact signal terminal board
• Thermal power plant boiler, turbine generator breaker, valve feedback, emergency trip discrete signal wiring base
• Offshore oil & gas platform gas turbine emergency shutdown valve, fire & gas detector contact input terminal assembly
• Chemical plant heavy-duty gas turbine interlock protection relay, solenoid valve drive output terminal board
• Legacy Mark VI turbine control cabinet upgrade overhaul, daily discrete channel wiring fault replacement spare IS230TDBTH6A terminal board
GE Vernova © IS230TDBTH6A TDBT Discrete I/O Terminal Board For Mark VI / Mark VIe Turbine Control System