Product Description

The IS200VAOCH1A is a GE Mark VI board component. The Mark VI was released in the 1990s as part of GE’s Speedtronic line of gas and steam turbine management systems. This management line began with the release of the Mark I in the 1960s.  Over the subsequent three decades, new technologies and advancements were introduced with each system. The MKVI features a central Control Module with triple redundant backups on critical controls, fully programmable maintenance tools, layered communications options for external and internal communication, a time synchronization option for controls, and hardware and software diagnostics.

The IS200VAOCH1A is an Analog Output board.  This board controls 16 analog 20mA outputs wired to analog terminal boards like the DTAO board or the TBAO board.  The VAOC board accepts digital values through the VME backplane via the VCMI board, then converts them to analog output currents.  The currents are sent to one of the terminal boards for measurement and then are returned to the VAOCH for control.

The user must note the IS200VAOCH1A is an earlier generation board that supports a lower resistance.  This board supports a load resistance up to 500 Ω at the end of 1000 feet of #18 wire.  

Attached to the front edge of the IS200VAOCH1A  is a narrow single-slot faceplate. The faceplate has three components built into its surface: a green LED (RUN,) a red LED (FAIL,) and an orange LED (STATUS.)  The board surface includes two backplane connectors along with connectors designed with conductive dots and traces. There are sixteen relays located on the board surface, along with dozens of integrated circuits.  These circuits include FPGAs (field programmable gate arrays,) oscillating chips, and SRAM chips. The board has various resistors, diodes, and capacitors.

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