Product Overview

The IS200VAICH1C is a high-density Analog I/O Processor Board developed by General Electric for the Speedtronic Mark VI turbine control system. Identified by the functional acronym VAIC, this VME-style card serves as the central interface for critical analog sensor feedback and control outputs. It is engineered to process a wide range of signal types, including current and voltage inputs from field transmitters, as well as providing precise analog outputs for actuator positioning. As a core component of the Mark VI assembly, the IS200VAICH1C ensures high-fidelity data conversion, enabling the main controller to perform complex governor and protection algorithms with extreme accuracy.

Hardware Parameters and Key Technical Characteristics

This Revision C module is designed for the H1 group configuration, providing extensive channel density within a single VME slot.

• Manufacturer General Electric (GE)

• Model Number IS200VAICH1C

• Alternate Part Number IS200VAICH1CBA

• Control Series Mark VI Speedtronic

• Board Type Analog I/O / VAIC Processor Board

• Total Channels 24 Channels

• Input Configuration 20 Analog Inputs (AI) supporting 4-20 mA or voltage signals

• Output Configuration 4 Analog Outputs (AO) for servo or actuator control

• Bus Interface Standard VMEbus architecture

• Hardware Group H1

• Revision Level C

• Physical Dimensions 35 cm x 33 cm x 3 cm

• Weight 0.95 kg

• Manufacturing Location Salem, Virginia, USA

Industrial Applications and Operational Use Cases

The IS200VAICH1C is fundamental to the monitoring and regulation of heavy-duty gas and steam turbine assets.

• Turbine Fuel Control Interfacing with fuel valve position transmitters and providing the 4-20 mA command signals required for precise combustion management.

• Process Parameter Monitoring Gathering pressure, temperature, and flow data from across the turbine skid to provide the DCS with real-time operational feedback.

• Actuator and Servo Loop Regulation Closing the loop on hydraulic or pneumatic actuators by processing position feedback and generating corrective analog outputs.

• Sensor Signal Conditioning Converting raw analog field data into high-resolution digital values for use by the Mark VI control cores.

• Legacy Control Maintenance Providing an essential replacement path for existing Mark VI installations in combined-cycle or simple-cycle power plants to ensure continued grid compliance.