DS200TCCBG3BDC General Electric Pcb Circuit Board Overview The DS200TCCBG3BDC is a Common Extended Analog I/O board (often named “TCCB” style) used in GE’s Mark V / DS200 turbine control / control system architecture.As an analog I/O extension board, its main purpose is to scale, condition, filter, and interface analog signals (4-20 mA, voltages, RTDs, etc.) from field sensors, generator/line measurements, and other instrumentation, and pass those into the control processing