GE IS200TDBSH2ACC IS230TNDSH2A Digital I/O Termination Board / Triple Redundant Speed Detection Board IS200TDBSH2ACC IS230TNDSH2A

Description

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Product Overview

The GE IS200TDBSH2ACC​ is a Digital Input/Output Termination Board designed for GE’s Mark VI and Mark VIe turbine control systems. This module serves as a critical interface between the central controller and field devices, handling discrete signals (ON/OFF states) from components like limit switches, pushbuttons, and proximity sensors, while also sending control signals to actuators such as solenoid valves, relays, and indicator lamps . Its modular design allows it to plug directly into a Mark VIe DIO pack frame, facilitating easy installation and communication via the system’s backplane . The board typically features LED indicators for each channel to simplify troubleshooting and includes protection mechanisms like opto-isolation to safeguard the control system from electrical disturbances on the field side . In contrast, the GE IS230TNDSH2A​ is a highly specialized Triple Redundant Speed Detection Termination Board. Its primary role is to provide critical overspeed protection for turbines . It employs a Triple Modular Redundant (TMR) design, featuring three independent channels that process speed signals simultaneously. This architecture uses a two-out-of-three voting logic to ensure continuous and safe operation even if one channel fails, making it a vital component for Safety Instrumented Systems (SIS) . It conditions raw pulse signals from magnetic pickups or proximity probes measuring shaft speed, converting them into clean, readable signals for the control system to prevent catastrophic turbine damage .

Technical Specifications

The specifications below are compiled from the search results, which contain some variations. The most consistently reported parameters are presented here.

Main Features and Advantages

GE IS200TDBSH2ACC: This digital I/O board is characterized by its robust interface capabilities, providing standard terminal blocks for simplified wiring of field devices . Its modular, hot-swappable design is a significant advantage, enabling module replacement without shutting down the entire control system, which drastically reduces maintenance downtime . The board’s built-in LED status indicators for each channel allow for rapid visual diagnostics and on-site troubleshooting. Furthermore, its design incorporates electrical isolation and protection features that shield the sensitive core of the control system from potential damage caused by electrical noise, surges, or faults on the field side, ensuring overall system stability .

GE IS230TNDSH2A: The foremost advantage of this module is its fault-tolerant Triple Modular Redundant (TMR) architecture. By processing speed signals through three independent channels and using voting logic, it guarantees extremely high reliability and availability for critical protection functions . This design is essential for overspeed protection, where a failure could lead to severe equipment damage. The board excels at conditioning raw, often weak, pulse signals from speed sensors, shaping and amplifying them into precise digital signals that the control system can reliably use for accurate speed monitoring and trip decisions . This combination of redundancy and precise signal processing makes the IS230TNDSH2A​ indispensable for safety-critical applications in turbine control.

Application Areas

The GE IS200TDBSH2ACC​ finds extensive use in gas and steam turbine control systems for routine logic control and status monitoring tasks. Typical applications include receiving start/stop commands, acquiring valve position feedback signals (e.g., fully open/fully closed), controlling the operation of auxiliary equipment like pumps and fans, and integrating signals from fire alarms or emergency shutdown systems . Its reliability makes it suitable for various industrial automation environments beyond power generation, including manufacturing and process industries where robust digital I/O handling is required .

The GE IS230TNDSH2A​ is deployed in scenarios demanding the highest level of safety and reliability, primarily for protecting expensive rotating equipment. Its core application is in shaft overspeed protection for gas and steam turbines, which is the most critical safety function for such machinery . It is also used for monitoring the speed of compressors and pumps in critical processes. Furthermore, it provides reliable speed feedback to the turbine control system for managing start-up sequences and other process control functions, ensuring not only safety but also operational efficiency .

Related Products

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IS200DIOx Series I/O Packs: These are the specific I/O packs that the IS200TDBSH2ACC​ termination board typically interfaces with in the Mark VIe system .

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IS230TNDTH2A: Another analog I/O input module within the same series, likely serving a similar but potentially distinct function from the IS230TNDSH2A​ .

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Mark VIe System Controllers (e.g., C300 series): These are the central controllers that both the IS200TDBSH2ACC​ and IS230TNDSH2A​ modules communicate with to execute control and protection strategies .

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IS200TRTDH1CCC: A related module used in turbine control systems, often for temperature measurement or other signal processing tasks .

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IS420ESWAH2A: A module part of GE’s control systems, used in different applications but within the same ecosystem .

HS;8538 9000.00

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