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- GE
- IS200TDBTH2A
- Contact Input/Relay Output Terminal Board
- USA
- 200 × 130 × 40 mm
- 0.45 kg
- Xiamen, China
- New & In Stock
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Product Overview
The GE IS200TDBTH2A is a Mark VIe Contact Input/Relay Output Terminal Board used to terminate and organize discrete field signals within a GE turbine control system. It provides a practical interface between field wiring and the associated control hardware, allowing contact inputs and relay output circuits to be brought into the control architecture in an organized manner.
In turbine control applications, field contacts may come from switches, interlocks, protection devices, auxiliary equipment, and other discrete signals. Relay outputs can be used to interface control commands with external devices. The IS200TDBTH2A provides the terminal-level connection point for these circuits rather than acting as the main controller itself.
The board is particularly relevant in installations where clear field wiring separation and accessible termination are required. Proper identification of each contact circuit is important because incorrect termination can affect both status detection and relay-controlled equipment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Model | IS200TDBTH2A |
| Product Family | Mark VIe |
| Product Type | Contact Input/Relay Output Terminal Board |
| Signal Type | Discrete Contact Inputs and Relay Outputs |
| Primary Function | Field signal termination and interface |
| Application | Turbine control and auxiliary discrete signal interfacing |
| Installation | Industrial control cabinet |
| Dimensions | 200 × 130 × 40 mm |
| Weight | 0.45 kg |
Product Features
- Contact input termination for discrete field signals
- Relay output interface for external control circuits
- Provides an organized field wiring interface
- Suitable for Mark VIe turbine control architectures
- Supports connection of switches, contacts, interlocks, and auxiliary devices
- Helps separate field wiring from controller-level connections
- Accessible terminal-board format for commissioning and maintenance
- Suitable for industrial turbine control cabinets
Working Principle
The IS200TDBTH2A provides the physical termination point between field contact circuits and the Mark VIe control architecture.
A typical signal path can be represented as:
Field Contact / External Device → IS200TDBTH2A → Mark VIe Control Hardware → Control Logic
For input circuits, a change in the state of an external contact is brought into the control system through the terminal board and can then be evaluated by the control logic. For relay output circuits, a control command from the Mark VIe system is transferred through the appropriate output circuit toward an external device.
The terminal board itself is primarily an interface and termination device. Signal processing, logic decisions, sequencing, and higher-level control functions are handled by the associated Mark VIe control hardware.
Role in a Mark VIe Turbine Control Architecture
The IS200TDBTH2A belongs to the field termination and discrete I/O interface layer of a Mark VIe system. It provides an accessible connection point for contact signals and relay-controlled circuits while keeping field wiring organized within the control cabinet.
| System Element | Function |
|---|---|
| Field Switches and Contacts | Provide discrete status, permissive, alarm, or interlock signals |
| IS200TDBTH2A Terminal Board | Terminates and interfaces contact inputs and relay output circuits |
| Mark VIe I/O Hardware | Acquires discrete input states and handles output commands |
| Mark VIe Controller | Executes control logic, sequencing, protection, and supervisory functions |
| Relay-Controlled External Devices | Receive discrete control commands from the control system |
| Turbine Auxiliary Equipment | Provides operating status and responds to control or interlock commands |
The board therefore sits between field wiring and the control-system I/O layer. Correct terminal identification is essential when commissioning or replacing the board.
Industrial Applications
| Application | Typical Use |
|---|---|
| Gas Turbine Control | Interfaces discrete field contacts and relay circuits associated with turbine operation |
| Steam Turbine Systems | Provides field termination for auxiliary status and control circuits |
| Turbine Auxiliary Equipment | Connects switches, interlocks, permissives, and auxiliary device contacts |
| Generator Systems | Supports discrete signal interfacing for associated electrical equipment |
| Balance-of-Plant Equipment | Provides termination for selected auxiliary equipment signals |
| Industrial Power Generation | Organizes discrete field wiring within turbine control cabinets |
| Process Plant Turbomachinery | Interfaces contact-based monitoring and control circuits |
| Maintenance and Retrofit Projects | Provides an accessible terminal interface during Mark VIe system service |
Installation and Maintenance
- Verify the Board Identification — Confirm that the replacement board is IS200TDBTH2A and matches the intended Mark VIe hardware configuration.
- Document Existing Wiring — Record terminal assignments and wire identification before disconnecting an installed board.
- Isolate the Relevant Circuits — Follow site procedures for de-energizing control and field circuits before installation or maintenance.
- Check Terminal Assignments — Compare field wiring against the applicable system drawings before reconnecting any contact or relay circuit.
- Inspect Terminal Connections — Check for loose conductors, damaged terminals, corrosion, or signs of overheating.
- Separate Input and Output Circuits — Maintain clear identification between contact input wiring and relay output wiring during installation and maintenance.
- Verify Field Contact States — Confirm that connected switches, permissives, and interlocks produce the expected input states.
- Check Relay Output Circuits — Verify that commanded relay outputs reach the intended external circuits without unintended activation.
- Inspect Cabinet Wiring — Look for damaged insulation, excessive bending, poor routing, or loose cable supports around the terminal board.
- Perform Functional Testing — After installation, test representative input and output circuits through the applicable Mark VIe control logic.
- Investigate Unexpected I/O States — If a discrete point does not behave correctly, check field wiring, terminal assignment, associated I/O hardware, and control logic before replacing the terminal board.
- Follow Turbine Safety Procedures — Maintenance should be performed under the plant’s approved turbine control, electrical isolation, and lockout/tagout procedures.
For troubleshooting, distinguish between a terminal-board wiring problem and an upstream or downstream control problem. A single incorrect input may result from field wiring or terminal assignment, while multiple affected points can indicate a common I/O, power, or controller-side issue.
Related Components
| Component | Function |
|---|---|
| GE Mark VIe Controller | Executes turbine control logic and sequencing |
| Mark VIe I/O Hardware | Acquires discrete inputs and manages output commands |
| Field Switches | Provide discrete operating or protection status |
| Interlock Devices | Supply permissive and trip-related contact signals |
| Relay-Controlled Equipment | Receives discrete commands from the control system |
| Terminal Wiring | Provides the physical connection between field devices and the terminal board |
| Turbine Auxiliary Equipment | Supplies operating status and responds to control commands |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| GE IS200TDBTH2A | Mark VIe Contact Input/Relay Output Terminal Board | Discrete contact and relay circuit termination |
| GE Mark VIe | Turbine Control System | Gas and steam turbine control applications |
| GE Mark VIe I/O Modules | Control System I/O Hardware | Field signal acquisition and output control |
| GE Mark VIe Controller | Turbine Controller | Control logic, sequencing, and supervisory functions |
| GE Mark VIe Terminal Boards | Field Interface Hardware | Field wiring termination and signal distribution |
Key Advantages
- Provides a dedicated interface for contact input and relay output circuits
- Organizes discrete field wiring within the Mark VIe architecture
- Supports turbine control and auxiliary equipment interfacing
- Simplifies access to field termination points during maintenance
- Separates field wiring connections from controller-level processing
- Suitable for industrial turbine control cabinet installations
Technical FAQs
What is the main function of the GE IS200TDBTH2A?
The IS200TDBTH2A functions as a Mark VIe contact input and relay output terminal board. It provides field termination and interfacing for discrete contact signals and relay-controlled circuits.
Does the IS200TDBTH2A perform turbine control logic?
No. The terminal board provides the physical signal interface. Control decisions, sequencing, and related logic are handled by the associated Mark VIe I/O and controller hardware.
What should be checked when a contact input has the wrong state?
Check the field device, wiring continuity, terminal assignment, contact condition, and associated Mark VIe I/O channel. If the field contact and wiring are correct, the I/O hardware and control configuration should then be investigated.
What should be verified when replacing an IS200TDBTH2A?
Verify the exact board model, document the existing terminal assignments, isolate the relevant circuits, and reconnect the field wiring according to the applicable Mark VIe system documentation. Functional testing should confirm both contact inputs and relay output circuits after replacement.