Description

 GE IS200TDBSH2ACC IS230TNDSH2A

This is a digital signal termination board for the Mark VIe system’s distributed I/O modules.

 

1. GE IS200TDBSH2ACC – Digital I/O Termination Board

This is a Digital Signal Termination Board used in the Distributed I/O Modules of the Mark VIe system.

Core Product Description:

The IS200TDBSH2ACC is a Digital Input/Output Termination Board, typically used with specific I/O packs (such as the IS200DIOx series). It acts as an interface between the control system and field devices, primarily responsible for receiving and sending discrete signals (i.e., “ON/OFF” or “High/Low” signals).

Key Functions & Features:

• Signal Type: Handles Digital Input (DI) and Digital Output (DO) signals.

  • DI: Receives switch status signals from field devices, e.g., the state of limit switches, pushbuttons, relay contacts, proximity switches (On/Off).

  • DO: Sends switch control signals to field devices, e.g., driving relays, solenoid valves, indicator lamps, and small contactors.

• Electrical Interface: The board provides standard terminal blocks for connecting field device wires. It conditions the high-voltage/current field signals to low-level signals processable by the control system’s electronic cards, and vice versa.

• Modular Design: It is designed to plug into a Mark VIe DIO pack frame and communicates with the controller via a backplane bus.

• Status Indication: Typically includes LED indicators to show the status of each I/O channel, facilitating on-site debugging and troubleshooting.

• Protection Functions: Usually includes features like overcurrent protection, overvoltage protection, or opto-isolation to protect the control system core from electrical interference or faults on the field side.

Typical Applications:

In gas or steam turbine control systems, this board might be used for:

• Receiving Start/Stop commands.

• Acquiring valve position feedback (fully open/fully closed) signals.

• Controlling the start/stop of pumps or fans.

• Integrating fire alarm or emergency shutdown signals.

• Driving alarm indicator lights or horns.

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2. GE IS230TNDSH2A – Triple Redundant Speed Detection Termination Board

This is a highly specialized and critical Triple Redundant Speed Detection Termination Board.

Core Product Description:

The IS230TNDSH2A is a termination board dedicated to turbo machinery speed monitoring and protection. Its key characteristic is its Triple Modular Redundant (TMR) design, meaning it incorporates three independent, identical signal conditioning circuits that use a “two-out-of-three” voting logic to achieve extremely high reliability and safety.

Key Functions & Features:

• Signal Type: Processes raw pulse signals from magnetic pickups or proximity probes, which are used to measure the rotational speed of the turbine shaft.

• Triple Modular Redundancy (TMR):

  • This is the most critical feature of the board. Three independent channels process the same speed signal simultaneously.

  • The control system compares the results from all three channels. If one channel fails and provides a result that disagrees with the other two, the system automatically disregards the faulty channel and adopts the consistent result from the two good channels. This ensures continuous and safe operation even in the event of a single point of failure.

• Signal Conditioning: It shapes, filters, and amplifies the raw sine or pulse waveforms from the sensors, converting them into clean square wave signals that the control system can read accurately.

• Overspeed Protection: This is its most critical application. The control system uses the speed signal provided by this board to compare against a set overspeed trip value. If the speed exceeds the safety threshold, the system immediately triggers an Emergency Trip System (ETS) to protect the turbine from damage due to overspeeding.

• High Reliability: The TMR design and adherence to strict industrial standards make it a core component of Safety Instrumented Systems (SIS) or critical protection loops.

• Zero Speed Detection: Can also be used to monitor the turbine’s turning gear speed or shutdown status.

Typical Applications:

• Shaft overspeed protection for gas/steam turbines – This is the core, most critical protection function.

• Monitoring the speed of compressors or pumps.

• Providing speed feedback to the control system for sequence control (e.g., start-up sequencing) and process control.

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Summary & Comparison

In conclusion:

• The IS200TDBSH2ACC is a general-purpose “switch signal” interface board.

• The IS230TNDSH2A is a highly specialized “speed monitoring officer” for life-safety protection, whose triple design ensures fault-tolerant reliability.

These two components work together to form the robust and reliable monitoring and protection network of the GE Mark VIe control system.

 

Sales of the brand:

ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.

 

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🥇Product Condition: One-year warranty

 

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