GE IS200 Speedtronic Mark VI Modules – IS200ERBPG1ACA

Technical Dossier

Product Details And Specifications

GE IS200 Speedtronic Mark VI Series Technical Notes

The Evolution of IS200 Architecture

The Speedtronic lineage begins with Mark I (1968), progressing through Mark II, Mark IV, and Mark V before the Mark VI platform was introduced in the mid-1990s. The Mark VI represented a fundamental architectural shift: from proprietary card-cage designs to a VMEbus-based modular system with standardized IS200-prefix I/O boards. The IS200 hardware generation introduced a separation between the controller (VCMI, VTUR, VPRO) and the I/O termination layer, enabling field replacement of individual modules without disturbing wiring terminations on companion TBCI/TBQC terminal boards.

The Mark VIe generation (IS420-prefix modules) followed in the 2000s, introducing Ethernet-based IONet replacing the earlier ARCNET topology, and expanding the I/O density per rack. IS200 modules are not directly interchangeable with IS420 modules; backplane connectors, firmware, and toolchain (ToolboxST vs. earlier CIMPLICITY-based configuration) differ between generations. Plants running original Mark VI hardware must source IS200-series replacements specifically — IS420 substitution requires a formal control system upgrade project.

As of 2026, GE Vernova (the successor entity to GE Power) has formally classified the majority of IS200-series modules as mature/end-of-life, with new manufacture discontinued for most part numbers. Lifecycle extension support is now the primary procurement mode for IS200 hardware.

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced IS200-series modules. Each entry reflects the module's primary functional role within the Mark VI control architecture.

IS200ERBPG1ACA: Exciter Regulator Board — AVR interface module for generator excitation control loops, interfaces with DSPX processor board.
IS200VCRCH1BBB: VME Crate Controller — primary rack controller managing backplane communication and module health monitoring.
IS200VCMIH2C: VME Communication Module Interface — handles IONet (ARCNET) network communication between controller and I/O racks.
IS200VTURH1BCC: Turbine Controller Module — primary turbine governor and sequencing processor; executes control application logic.
IS200VPROH1BCC: Protection Module — dedicated overspeed and flame-out protection processor with hardware trip relay outputs.
IS200DSPXH1ABA: Digital Signal Processor — high-speed analog computation module for excitation and generator control algorithms.
IS200TRLYH1BCC: Relay Output Module — 16-channel digital relay output board for trip and alarm actuator circuits.
IS200TBAIH1C: Analog Input Terminal Board — passive termination board for thermocouple and 4–20 mA analog input signals.
IS200TBCIH1C: Contact Input Terminal Board — passive termination board for discrete 24 VDC contact input signals.
IS200TBQCH1C: Quad Contact Input Terminal Board — high-density discrete input termination, 64-channel configuration.
IS200AEAAH1ABA: Analog I/O Expansion Module — mixed analog input/output expansion for auxiliary control loops.
IS200EDCFH1ABA: Exciter DC Feedback Module — DC bus voltage and current feedback acquisition for static excitation systems.
IS200EACFH1ABA: Exciter AC Feedback Module — AC voltage and current measurement module for generator terminal quantities.
IS200EPCTG1ABA: Exciter Protection and Control Module — integrated protection relay and AVR supervisory logic for excitation systems.
IS200STCIH1ACA: Speed and Temperature Control Interface — dual-function module acquiring turbine speed (MPU) and exhaust thermocouple inputs.
IS200BICLH1ABA: Bus Interface and Communication Link Module — gateway module bridging Mark VI IONet to external Modbus or PROFIBUS networks.
IS200PSCDH1ABA: Power Supply Conditioner — DC/DC converter and power distribution module for IS200 rack auxiliary power rails.

Quality Control for the IS200 Range

IS200-series modules present specific test challenges due to their VMEbus backplane interface, dual-ported SRAM architecture, and in some cases embedded EEPROM firmware that must be validated against the target Mark VI software revision. DriveKNMS applies the following test protocol to all IS200 units prior to dispatch:

Backplane connector inspection: VME P1/P2 connector pin integrity check under 10× magnification; bent or oxidized pins are cause for rejection. Functional power-on test: module is seated in a live IS200-compatible VME crate; power rail voltages (+5 V, ±12 V) are verified at the module edge connector. Communication bus validation: for VCMI and VTUR modules, IONet ARCNET participation is confirmed via network analyzer capture. Relay output verification: for TRLY modules, all 16 relay channels are actuated and contact resistance measured (<0.5 Ω). Analog channel calibration check: for TBAIH and AEAAH modules, a calibrated signal source is applied across the full 4–20 mA and thermocouple input ranges; output linearity is verified against GE specification GEH-6421. Firmware revision logging: embedded firmware version is read and recorded; customers are advised of any revision mismatch relative to their installed ToolboxST application version.