Description
The GE DS200TCQCG1B is a critical Terminal Board (TCQC) utilized within the GE Speedtronic Mark V control system. This board is specifically designed to manage and distribute I/O signals, serving as the interface between the control system and external field devices. It features sophisticated circuitry for signal conditioning, ensuring that low-level sensor inputs are accurately processed and that control commands are transmitted reliably to actuators. The “RST” designation refers to the specific redundant processor architecture (R, S, and T cores) that this board supports, ensuring high-availability control for turbines and compressors.

📋 Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | GE Speedtronic Mark V Terminal Board (TCQC) |
| Model Number | DS200TCQCG1B |
| Core Function | I/O signal distribution and termination |
| System Compatibility | Mark V Speedtronic Control System |
| Diagnostic Code | Often associated with “Overflow” or “Fault” status |
| Usage | Turbine control and machinery protection |
| Redundancy | Designed for triple modular redundant (TMR) systems |
| Mounting Style | Cabinet-mounted terminal block assembly |
| Dimensions | Standard Mark V board footprint |
| Weight | Approx. 1.0 kg |
🚀 Recommended Series Models
These components are frequently maintained or replaced alongside the TCQC board to ensure the stability of the Mark V control environment:
- DS200TCQAG1B – Primary I/O Terminal Board (TCQA)
- DS200TCCAG1B – Communication Board (TCCA)
- DS200SDCCG1A – Drive Control Card (SDCC)
- DS200DTBIG1A – Digital Terminal Board (DTBI)
- DS200RTBAG1A – Relay Terminal Board (RTBA)
- DS200PTBAG1A – Power Terminal Board (PTBA)
- DS200TCQBG1A – Secondary I/O interface board
- DS200DCFBG1A – Control Power Supply board
- DS200UCCAG1A – Universal Control Card (UCCA)
- DS200SHVMG1A – High Voltage Monitor board
⚠️ Note on “Overflow” Error
A diagnostic “Overflow” or fault related to the TS67Z reference typically indicates a communication or synchronization discrepancy within the TMR (RST) architecture. It is recommended to verify the health of the associated ribbon cables and ensure that the TCCA (Communication Board) is providing synchronized timing to the TCQC board.

