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The GE IS200DTTCH1ABB Simplex DIN-rail Mounted Thermocouple Terminal Board (DTTC) is a critical Printed Circuit Board (PCB) used in the GE Speedtronic Mark VI Turbine Control System.
Its primary function is to serve as the field-wiring interface and provide essential signal conditioning for thermocouple temperature sensors.
⚙️ Key Functions and Technical Specifications
The DTTC board is designed to accurately read and prepare low-level voltage signals from thermocouples before they are digitized by the main control processor.
| Feature | Details |
| System | GE Speedtronic Mark VI Turbine Control System |
| Function | Simplex (Non-redundant) Thermocouple Input Terminal Board |
| Input Capacity | 12 thermocouple input channels |
| Supported Types | Accepts inputs from various thermocouple types, including E, J, K, and T (grounded or ungrounded). |
| Cold Junction Reference (CJR) | Includes a cold junction reference device on the board. This is vital for compensation to ensure accurate temperature measurement. |
| Processor Interface | Connects to the main thermocouple processor board, typically the VTCC (VME Thermocouple Control Board), via a single 37-pin cable. |
| Scalability | A single VTCC board can accommodate two DTTC boards, allowing for a total of 24 thermocouple inputs in the control system. |
| Mounting | Designed for DIN-rail mounting using permanently fixed Euro-Block terminal blocks for secure field wiring. |
| Revision | The suffix H1ABB indicates the specific hardware and artwork revisions of the board. |
The use of the DTTC board simplifies field wiring and ensures that the low-voltage thermocouple signals are properly filtered, referenced, and ready for accurate conversion by the control system, which is crucial for turbine protection and performance monitoring.
