GE IS200CTBCG1AA I/O Terminal Board

الوصف

The GE IS200CTBCG1AA is an I/O Terminal Board manufactured by General Electric (GE) for the Mark VI Speedtronic Turbine Control System.

It serves as a crucial interface and signal distribution point between the field wiring (from the turbine’s sensors and actuators) and the sensitive electronic control modules housed in the Mark VI VME rack.

⚙️ Key Function and System Role

The terminal board’s primary functions are focused on providing a secure and reliable connection in a harsh industrial environment:

• Customer Wiring Interface: It is the direct connection point for the customer’s field wiring. These wires are attached to the board’s terminal blocks, simplifying external cable management.
• Signal Routing (Fan-Out): The board routes and distributes the incoming I/O signals from the terminal blocks to the control system. In TMR (Triple Modular Redundant) systems, this board is often designed to “fan out” the signal, distributing it to multiple redundant I/O packs (e.g., to the R, S, and T channels).
• Protection Circuitry: Terminal boards like the CTBC contain minimal active circuitry. Components are typically limited to filters and protective devices (like surge suppressors) to shield the delicate I/O control modules from high-frequency noise and voltage transients that might originate from the field devices.
• Integration: The board features large terminal strips for field wiring on one side and compact D-shell connectors (e.g., DC-37 pin) on the opposite side. Ribbon cables connect these D-shell connectors to the corresponding I/O packs/modules inside the VME control rack.

The letters ‘AA’ in the part number denote the specific artwork and revision level of the base IS200CTBCG1 board.

🔌 Compatible I/O Modules

Terminal boards are specific to the type of signal they handle (contact, analog, thermocouple, etc.) and are paired with a specific I/O pack in the Mark VI system.

While the exact module for the IS200CTBCG1AA requires direct reference to GE documentation, terminal boards in the Mark VI system generally connect to:

• VME I/O Boards (Mark VI): In the classic Mark VI system, the terminal board connects via cables to a specific I/O board (like a VCIN for analog input or TCIS for thermocouple input) inside the VME chassis.
• PDIA/PDIO I/O Packs (Mark VIe): In the newer Mark VIe system, a similar terminal board would often connect directly to networked I/O packs (e.g., PDIA or PDIO), which contain the local processor and communication capabilities.