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3. Key Technical Specifications
| Parameter | Value |
| Manufacturer | GE (General Electric) |
| Part Number | DS200TBQCG1AAA |
| Board Acronym | TBQC |
| System Compatibility | Mark V Speedtronic (RST Cores) |
| Signal Type | Digital Input / Output |
| Termination Style | Fixed Screw Terminal Blocks |
| Connectivity | High-density ribbon cable headers (J-series) |
| Redundancy | Supports <R>, <S>, and <T> core distribution |
| Revision Level | G1AAA |
4. Product Introduction & Supply Chain Strategy
The GE DS200TBQCG1AAA is a critical termination board used within the GE Mark V Speedtronic control system. It acts as the physical interface point where field wiring for digital signals connects to the control processor. Specifically designed for the <R>, <S>, and <T> cores, the TBQC facilitates the signal distribution necessary for the Mark V’s signature Triple Modular Redundancy (TMR), ensuring that a single point of failure at the I/O level does not trigger a turbine trip.
From a supply chain perspective, the TBQC is a high-impact reliability component. Because termination boards are the direct interface with field environmental conditions, they are susceptible to terminal corrosion and trace degradation. Securing New Surplus units is a vital TCO-reduction strategy; unlike refurbished boards that may have weakened solder joints from years of vibration and field-wiring stress, our New Surplus boards offer a clean, zero-hour contact surface that ensures signal integrity and prevents “ghost” digital faults.
5. Installation & Configuration Guide
- Stage 1: Pre-Installation (Prep & Safety): Power down the Mark V control cabinet and follow LOTO procedures. Use an ESD-safe workspace. Document the location of every field wire on the terminal blocks; color-coded labels or high-resolution photos are mandatory for complex TMR wiring.
- Stage 2: Removal: Carefully unscrew the field wires from the terminal blocks. Disconnect the ribbon cables from the J1, J2, and other headers. Unscrew the mounting hardware from the cabinet standoffs and remove the board, ensuring no screws fall into the backplane.
- Stage 3: Installation (Clone & Seat): Check for any hardware jumpers on the new DS200TBQCG1AAA. Ensure they are configured to match the voting or signal logic of your specific core. Mount the board to the standoffs and reconnect the ribbon cables first, followed by the field wiring.
- Stage 4: Power-On & Testing: Restore control power. Check the diagnostic LEDs on the associated I/O cards to ensure the TBQC is being “seen” by the controller. Perform a point-to-point check of critical digital inputs (e.g., limit switches or pushbuttons) to verify correct signal flow through the new board.
6. Firmware/Software Versions & Upgrade Notes
As a passive termination board, the DS200TBQCG1AAA does not carry firmware. However, it must be physically compatible with the I/O cards (like the TCDA or TCQA) installed in the rack. The “G1AAA” revision is the baseline for many Mark V systems; if you are replacing a later revision with this version, verify that the terminal layouts and voltage ratings for the digital I/O points have not changed in your system’s documentation.
- DS200TBQCG1AAA
7. Frequently Asked Questions (FAQ)
Does this board support Triple Modular Redundant (TMR) systems?
Yes. The TBQC is specifically designed to distribute signals to the <R>, <S>, and <T> cores of the Mark V system, making it an essential component for high-reliability TMR configurations.
Are the terminal blocks removable for easier wiring?
The DS200TBQCG1AAA typically features fixed screw terminals directly soldered to the PCB for maximum signal reliability. You should disconnect wires individually rather than attempting to pull the blocks.
Why should I buy “New Surplus” instead of a cheaper refurbished board?
In digital termination, the quality of the contact point is everything. Refurbished boards often have stripped screw threads or microscopic corrosion inside the terminals from previous field use. New Surplus guarantees factory-fresh terminal threads and un-oxidized copper traces.
Can this board handle 125 VDC digital inputs?
Yes, the TBQC is designed to handle the standard voltage levels used in GE Mark V digital I/O circuits, but you must ensure your jumpers are set correctly for your specific application’s voltage scaling.
What is the lead time for this module?
We maintain the DS200TBQCG1AAA in stock for immediate shipment. This is a critical spare part, and we prioritize fast delivery to help you avoid or resolve unplanned downtime.
