GE IS200VAICH1D VME Analog Input Board for Mark VI Turbine

The GE IS200VAICH1D is a Contact Input Group Isolation terminal board, part of the VAIC system in GE’s Mark VI turbine control systems. It handles 20 analog inputs and 4 analog outputs, converting analog signals to digital via the VAIC processing board and transmitting data to the controller through the VME backplane. It supports both simplex and TMR setups—TMR configurations fan out signals to three VME racks (R, S, T) for redundancy.

Compatible with earlier VAIC generations, it works with TBAIH1B terminal boards and all DTAI revisions, driving 20 mA outputs over 1000 feet of #18 wire with 500Ω load resistance. Installation involves securing the board in a VME rack, while operation relies on jumpers to configure input types and output ranges.

Features:

I/O Capacity: 20 analog inputs and 4 outputs, with 10 inputs/2 outputs per terminal board.

Redundancy Support: Compatible with TMR systems, distributing signals to three VME racks for fault tolerance, plus simplex setups.

Signal Processing: Integrates signal conditioning, A/D/D/A conversion, and an analog multiplexer for accurate signal translation.

Diagnostics: Front-panel LEDs indicate operational states; includes hardware/system limit checks, TMR signal validation, and compatibility checks with TBAI ID chips.

Compatibility & Flexibility: Works with legacy VAIC boards, supports various input/output types via jumpers, and enables compressor stall detection for gas turbines.

Industrial Durability: Designed for harsh environments, with stable performance over long cable runs and configurable parameters for alarms.