IS200SPROH1A is a Processor Board within the GE Mark VIe Speedtronic control system, designed as the main computing engine for turbine control applications. This board features a PowerPC-based processor with embedded real-time operating system, executing turbine protection, sequencing, and regulatory control logic. It communicates via the VME backplane with I/O termination boards and supports triple-modular redundancy (TMR) configurations for safety-critical applications. The IS200SPROH1A includes onboard memory, communication ports (Ethernet, serial), and hardware watchdog timers for fail-safe operation.
IS200SPIDG1ABA is a Power Distribution Board within the GE Mark VIe Speedtronic control system, designed to distribute and condition DC power to VME-based turbine control modules. This board provides regulated +5V, +12V, -12V, and +24V outputs to multiple backplane slots, with built-in overvoltage, overcurrent, and thermal protection. It includes input filtering, surge suppression, and status monitoring for reliable power delivery to critical GE turbine control components.
IS200SFCBG1AAA is an advanced Fan Control Board within the GE Mark VIe Speedtronic control system, designed for high-reliability cooling fan management in VME-based turbine control cabinets. This board is a variant of the IS200SFCBG1A series, distinguished by its extended operating temperature range (–40°C to +70°C) , enhanced EMI filtering, and redundant tachometer input circuitry for mission-critical cooling applications. The IS200SFCBG1AAA provides intelligent, closed-loop speed control and monitoring for up to four DC brushless fans, incorporating dual-redundant temperature sensing, advanced PWM regulation, tachometer feedback with hardware validation, and comprehensive fault detection. The board interfaces directly with the Mark VIe controller via the VME backplane, enabling the main processor to log fan health, trend degradation, and coordinate cooling strategies based on thermal load data—essential for turbines operating in extreme environments such as arctic stations, desert installations, or offshore platforms.
IS200SFCBG1A is a Fan Control Board within the GE Mark VIe Speedtronic control system, specifically designed for cooling fan management in VME-based turbine control cabinets. This board provides intelligent, closed-loop speed control and monitoring for up to four DC brushless fans used to maintain proper airflow and thermal management within the Mark VIe chassis and enclosure. Unlike simple on/off fan controllers, IS200SFCBG1A incorporates temperature sensing, pulse-width modulation (PWM) speed regulation, tachometer feedback monitoring, and fault detection—ensuring that critical turbine control electronics remain within safe operating temperatures even during ambient temperature extremes. The board interfaces directly with the Mark VIe controller via the VME backplane, allowing the main processor to log fan health, adjust speeds based on thermal load, and generate alarms for fan degradation or failure.
IS200SCTTG1AAA is a Thermocouple Input Terminal Board within the GE Mark VIe Speedtronic control system. It is a variant of the IS200SCTTG1A series, distinguished by its extended temperature calibration and enhanced cold-junction compensation (CJC) accuracy for demanding turbine exhaust temperature monitoring applications. This board provides direct termination for up to 24 thermocouple inputs (types J, K, T, E, R, S, or B) or 12 RTD inputs (3-wire or 4-wire Pt100/Ni120), with factory-optimized linearization tables and dual-redundant CJC sensors. The IS200SCTTG1AAA interfaces with the Mark VIe main VME-based controller processors via front-panel I/O cables, delivering digitized temperature data with superior accuracy across an extended operating temperature range of –40°C to +70°C—making it specifically suited for outdoor or unheated turbine enclosures.
IS200SCTTG1A is a Terminal Board within the GE Mark VIe Speedtronic control system, specifically designed for thermocouple and RTD (Resistance Temperature Detector) input signal conditioning. Unlike the contact-type IS200SCTLG1ABA, this board serves as the analog front-end for temperature sensors in gas and steam turbine applications. It provides direct termination for up to 24 thermocouple inputs (types J, K, T, E, R, S, or B) or 12 RTD inputs (3-wire or 4-wire configurations), with built-in cold-junction compensation (CJC) and high-accuracy analog-to-digital conversion. The IS200SCTTG1A interfaces directly with the Mark VIe main VME-based controller processors via front-panel I/O cables, delivering digitized temperature data with excellent noise immunity and linearization across the full industrial temperature range.
IS200SCTLG1ABA is a Smart Contact Input/Output Terminal Board within the GE Mark VIe Speedtronic control system. It is a critical field-termination accessory designed specifically for GE heavy-duty gas and steam turbine applications. This board physically interfaces field-mounted dry-contact sensors—such as pressure switches, temperature switches, valve limit switches, and emergency stop pushbuttons—with the main Mark VIe VME-based controller processors. The “smart” designation comes from its onboard logic capabilities, which include programmable contact debouncing, change-of-state detection, and high-resolution hardware time-stamping, offloading real-time processing tasks from the main CPU to improve overall system determinism.
The IS200SCTLG1A is an Enhanced I/O / Serial / Control / Terminal / Logic Gateway (SCTLG) Interface Board from GE’s Mark VI Speedtronic™ series, designed for serial communication, control logic, terminal interface, and logic gateway functions in turbine control systems. Unlike the signal conversion/voltage focus of IS200SCNVG1ADC, the IS200SCTLG1A specializes in control logic processing, terminal interface management, and logic-based gateway communication for integrated control applications. The “A” suffix indicates a specific hardware revision or firmware configuration for serial/control/terminal/logic gateway applications.
The IS200SCNVG1ADC is an Enhanced I/O / Serial / Converter / Network / Voltage Gateway (SCNVG) Interface Board from GE’s Mark VI Speedtronic™ series. This model shares the core signal conversion, voltage monitoring, and gateway functionality of the IS200SCNVG1A but features a distinct suffix configuration (“ADC”), indicating a different firmware preload, enhanced conversion algorithms, or specific configuration optimized for alternative signal types, voltage ranges, or network integration requirements. The IS200SCNVG1ADC provides signal conversion and voltage monitoring with the “ADC” firmware typically offering advanced conversion accuracy and enhanced diagnostic capabilities.
The IS200SCNVG1A is an Enhanced I/O / Serial / Converter / Network / Voltage Gateway (SCNVG) Interface Board from GE’s Mark VI Speedtronic™ series, designed for serial communication, signal conversion, network integration, and voltage monitoring with gateway functions in turbine control systems. Unlike the serial/analog/module focus of IS200SAMBH1A, the IS200SCNVG1A specializes in signal conversion and voltage monitoring with network integration, providing gateway functions for various signal types. The “A” suffix indicates a specific hardware revision or firmware configuration for converter/network/voltage gateway applications.
The IS200SAMBH1A is an Enhanced I/O / Serial / Analog / Module / Bus Highway (SAMBH) Interface Board from GE’s Mark VI Speedtronic™ series, designed for serial, analog, and module integration with bus highway communication in turbine control systems. Unlike the relay/Ethernet/fieldbus focus of IS200REBFH1A, the IS200SAMBH1A specializes in providing comprehensive serial, analog signal processing, and module interface functions with highway integration for versatile control system connectivity. The “A” suffix indicates a specific hardware revision or firmware configuration for serial/analog/module bus highway applications.
The IS200REBFH1A is an Enhanced I/O / Relay / Ethernet / Bus / Fieldbus Highway (REBFH) Interface Board from GE’s Mark VI Speedtronic™ series, designed for relay, Ethernet, bus, and fieldbus highway integration in turbine control systems. Unlike the remote control/serial focus of IS200RCSBG1BAA, the IS200REBFH1A specializes in providing comprehensive communication integration, combining relay management with Ethernet, bus, and fieldbus highway functions for versatile control system connectivity. The “A” suffix indicates a specific hardware revision or firmware configuration for relay/Ethernet/bus/fieldbus highway applications.
