Description
The GE IS200TDBTH6ACD is a Discrete Simplex Terminal Board (TDBT) designed for the Mark VI Speedtronic turbine control system. It serves as the physical interface for landing field wiring for discrete (digital) inputs and outputs, routing these signals to the associated I/O processor boards in the control rack.
Product Parameters (Datasheet)
- Model Number: IS200TDBTH6ACD
- Series: Mark VI Speedtronic
- Board Type: Discrete Terminal Board (Simplex)
- Inputs: Supports up to 24 contact inputs
- Outputs: Supports up to 12 relay outputs (depending on configuration)
- Voltage Rating: Typically 24 V DC or 125 V DC (determined by the I/O pack/board used)
- Connector Type: Two high-density D-type connectors for connection to the I/O rack
- Terminal Blocks: Two rows of heavy-duty barrier-style screw terminals for field wiring
- Revision: “H6ACD” indicates specific hardware grouping, coating, and firmware compatibility
GE IS200TDBTH6ACD
GE IS200TDBTH6ACD
GE IS200TDBTH6ACD
Country of Origin
This turbine control interface is engineered and manufactured by General Electric (GE) in the USA, specifically for high-reliability power plant and industrial turbine applications.
Application Fields
The IS200TDBTH6ACD is utilized in critical control loops where discrete signal monitoring is required:
- Gas Turbine Control: Monitoring limit switches, pressure switches, and auxiliary motor starter contacts.
- Steam Turbine Safety: Interfacing with emergency trip solenoids and valve position switches.
- Generator Protection: Managing discrete alarms and breaker status signals.
- Balance of Plant (BOP): Coordinating auxiliary pumps, fans, and lube oil system states.
- Fuel Management: Controlling solenoid valves for fuel switching and isolation.
Product Usage Instructions
- Mounting: Secure the board to the terminal cabinet’s DIN rail or mounting plate. Ensure the board is grounded through its mounting hardware.
- Field Wiring: Land the discrete field wires (switches, sensors, or relay coils) onto the screw terminals. Ensure proper torque to prevent loose connections in high-vibration environments.
- Cabling: Connect the high-density cables from the TDBT board to the corresponding I/O processor board (e.g., VCRC or VDR) in the Mark VI rack.
- Configuration: Use the GE Toolbox software to configure the input/output types, inversion logic, and diagnostic limits associated with the specific terminals on this board.
- Fusing: Check the onboard fuses (if applicable to your specific revision) to ensure they are intact. These fuses protect the control logic from field-side electrical faults.
Product Technical Description
The IS200TDBTH6ACD functions as a passive interface in a Simplex configuration, meaning it routes signals to a single I/O processor rather than a redundant (TMR) set. Technically, it provides signal conditioning and surge suppression for 24 dry contact inputs. The board uses opto-isolation (within the connected I/O board) to prevent high-voltage field transients from damaging the sensitive control processors. The “H6” revision features enhanced environmental coating (conformal coating) to resist moisture and chemical contaminants common in power plant environments. The “ACD” suffix represents the specific versioning for hardware components and factory-loaded logic configurations.
Q&A (Common Questions)
- Q: What is the difference between a Simplex and TMR terminal board?
- A: A Simplex board (like the TDBT) connects to one I/O processor. A TMR (Triple Modular Redundant) board splits field signals to three separate processors for voting and fault tolerance.
- Q: Can this board be used for 125 V DC signals?
- A: Yes, provided the connected I/O processor board and the external power supply are configured for 125 V DC logic levels.
- Q: Why are there two D-shell connectors?
- A: These allow for “branching” or redundant cabling paths to the I/O rack, or for connecting auxiliary diagnostic equipment.
- Q: Is it safe to replace this board while the system is live?
- A: While the Mark VI supports some hot-swapping, it is highly recommended to de-energize the field power before replacing a terminal board to prevent accidental shorts or unintended turbine trips.
Similar Model Recommendations
- GE IS200TDBTH2A: An earlier version of the discrete terminal board.
- GE IS200TRTDH1B: Terminal board specifically for Resistance Temperature Detectors (RTD).
- GE IS200TBAIH1C: Analog Input terminal board.
- GE IS200TBTCH1B: Thermocouple input terminal board.
- GE IS215VPROH1B: Emergency Turbine Protection board (often works with discrete inputs).
For technical manuals or to request a quote for the GE IS200TDBTH6ACD, please contact our turbine control parts team.
