Description

IS200TDBTH6ACD TDBT Discrete Terminal Board

Technical Specifications

• Product Model: IS200TDBTH6ACD
• Brand: GE Vernova (Mark VI / Mark VIe Speedtronic series)
• Warranty: One Year
• Input Voltage: 24 VDC system logic power; field wetting voltage supports 24 V / 48 V / 125 VDC dry‑contact circuits
• Operating Temperature: ‑30 °C to +65 °C cabinet‑mount installation
• Storage Temperature: ‑40 °C to +85 °C
• Response Time: Hardware input filter debounce configurable; relay‑output switching <15 ms
• Protection Class: IP00 plug‑in rack‑mount PCB; conformal‑coated option available for harsh cabinet environments
• Accuracy Class: Passive signal conditioning for discrete contact signals; no analog measurement
• Output Frequency: Not applicable
• Rated Current Range: 24 isolated dry‑contact digital‑input channels; 12 Form‑C relay output channels; PTC resettable over‑current protection per group
• Communication Interface: Dual high‑density backplane connectors for mating with Mark VI/VIe I/O pack; screw‑clamp field wiring terminals; channel‑status LED indicators
• Supported Protocols: Signal termination for Mark VI / Mark VIe IONet distributed I/O system; supports simplex, dual‑redundant and TMR voting architectures
• Overload Capacity: AC noise‑filter hardware; transient‑voltage suppression; group‑level PTC current‑limiting; no user‑configurable jumpers or DIP‑switches on board
• Dimensions: Standard Mark VI‑series terminal‑board rack footprint

Product Overview

The IS200TDBTH6ACD is a high‑density discrete‑signal termination board for GE Speedtronic Mark VI / Mark VIe turbine‑generator control systems. It terminates 24‑point dry‑contact digital‑input signals from field switches, limit‑contacts and interlock devices, and provides 12 Form‑C relay outputs to drive external alarms, auxiliary relays and trip‑circuit loads. It conditions noisy plant‑field discrete signals and transfers them electrically to the paired I/O pack.

This terminal board addresses turbomachinery‑control challenges: high‑density discrete‑loop termination for turbine‑sequencing and safety‑interlock circuits, built‑in hardware noise‑filtering for plant‑site EMI interference, and drop‑in spare‑part compatibility for legacy Mark VI/VIe racks. Channel‑local LED indicators support fast on‑site troubleshooting without HMI access. Turbine‑control engineers, power‑plant maintenance technicians and retrofit integrators benefit most. It installs in standard Mark VI/VIe rack slots, and executes interlock‑sequence, emergency‑trip and auxiliary‑alarm functions for gas‑turbine, steam‑turbine and combined‑cycle power‑generation units.

Key Application Notes

• Must pair with corresponding Mark VI / Mark VIe discrete‑I/O pack; cannot work as standalone hardware
• Supports multiple wetting‑voltage levels for field dry‑contact loops (24 V / 48 V / 125 VDC)
• Equipped with resettable PTC fuses; no replaceable field‑fuses on‑board
• Non‑hot‑swap hardware: rack power must be removed before board replacement
• No on‑board jumpers; system redundancy configuration is set within ControlST software
• Conformal‑coated PCB variant available for high‑humidity, high‑dust cabinet environments
• Origin USA; widely used spare for gas‑turbine, steam‑turbine and combined‑cycle retrofit & maintenance projects