GE DS200 Speedtronic Modules – DS200TCCBG1AKC

Technical Dossier

Product Details And Specifications

GE DS200 Speedtronic Series Technical Notes

The Evolution of DS200 Architecture

The DS200 hardware architecture was introduced as part of the Mark V Speedtronic control system in the early 1990s, succeeding the Mark IV platform. The Mark V system introduced a triple-redundant processor architecture (TMR — Triple Modular Redundancy) alongside a simplex configuration, both built on the DS200 board family. The backplane communication bus uses a proprietary GE serial protocol (IONet) operating at 2 Mbps, which is incompatible with standard Modbus or PROFIBUS without dedicated gateway modules.

Key architectural transitions: Mark V (1991–2003) used DS200 boards exclusively. Mark VI (2000–present) introduced the IS200 board family as the successor platform, with no direct pin-compatible substitution. Mark VIe (2008–present) further migrated to Ethernet-based I/O (IS420 series). Operators maintaining Mark V systems must source DS200-series boards, as cross-generation substitution is not supported without full control system upgrades. This lifecycle position — mature/end-of-life hardware supporting active critical infrastructure — defines the sourcing challenge for DS200 components.

DS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified DS200-series modules. Each entry reflects the board's primary function within the Mark V Speedtronic control architecture.

DS200TCCBG1AKC: Turbine control termination board; provides field wiring interface for thermocouple and discrete I/O signals in Mark V simplex and TMR configurations.
DS200TCQAG1B: Turbine control I/O board; handles analog input acquisition for exhaust thermocouples and process temperature sensors.
DS200TCRAG1A: Turbine control relay output board; drives relay outputs for trip and alarm circuits in Mark V TMR systems.
DS200TCCAG1B: Turbine control contact input board; reads discrete contact closure signals from field devices including limit switches and pressure switches.
DS200SDCIG1A: Servo driver and contact input board; interfaces servo actuators and reads contact inputs for fuel control and IGV positioning.
DS200DCCAG1A: DC/DC converter and control board; provides regulated DC power conversion within the Mark V control panel.
DS200PCCAG1A: Power conditioning and control board; manages AC/DC power distribution and monitors panel power health.
DS200SHCBG1ADC: Speed and health control board; processes magnetic pickup speed signals and monitors turbine shaft dynamics.
DS200SLCCG1A: Sequence logic control board; executes ladder logic sequences for start/stop permissives and interlock management.
DS200TCEBG1A: Turbine control expansion board; extends I/O capacity for larger turbine configurations requiring additional signal termination.
DS200TCTAG1B: Turbine control thermocouple analog input board; dedicated to cold-junction-compensated thermocouple signal conditioning.
DS200DCFBG1ADB: DC feedback and control board; processes position feedback signals from LVDT and resolver transducers on control valves.
DS200SDCCG1A: Servo driver control board; generates PWM drive signals for electrohydraulic servo valves in fuel and steam control circuits.
DS200TCQBG1A: Turbine control quad analog input board; four-channel analog input module for process variable monitoring.
DS200TCDAG1A: Turbine control digital-to-analog output board; provides 4–20 mA analog output signals to field positioners and indicators.
DS200LDCNG1A: Local display and communication node board; interfaces the Mark V operator interface panel with the control processor over the IONet bus.
DS200EXPSG1A: Expansion power supply board; supplements main panel power for high-density I/O configurations.

Quality Control for the DS200 Range

DS200 boards present specific test challenges due to their proprietary backplane bus architecture and mixed analog/digital signal paths. DriveKNMS applies the following test protocol to all DS200 units prior to dispatch: