IS200VAICH1D GE Module Parts Mark VI VME Analog Input Board

The IS200VAICH1D (common revision IS200VAICH1DAB) is a VME-based analog input board developed for the GE Speedtronic Mark VI turbine control system. It collects analog signals from field sensors — including pressure transmitters, LVDTs, flow meters, and temperature transducers — converts them into digital data via a 16-bit ADC, and transmits the data to the Mark VI main controller through the VME backplane bus for turbine closed-loop regulation and protection logic.

This board is a core I/O spare part for gas turbine, steam turbine, and combined cycle power plant control cabinets, and is widely used for system overhauls and emergency replacement.

1. 20 high-density analog input channels for turbine process signal acquisition.
2. 16-bit high-resolution A/D conversion ensures accurate measurement of critical turbine parameters.
3. Multi-signal compatibility — supports 4–20 mA current loop and multiple voltage signals.
4. Galvanic isolation design reduces interference between the field side and the control backplane.
5. Built-in channel self-diagnosis for open circuit, short circuit, and over-range fault alarms.
6. Standard 6U VME structure — plug and play inside the Mark VI rack.
7. Supports signal filtering and programmable gain adjustment for different sensors.
8. Conformal coating option for high-humidity and corrosive power plant environments.
9. Front status LED indicators for power, communication, and channel faults.
10. Compatible with Mark VI turbine control software for calibration and configuration.