The IS200GGXDG1ABB is an Expander Diode Source Board made for the Mark VI system. The Mark VI is part of the Speedtronic series that has provided gas/steam turbine management through different systems since the late 1960s. The MKVI is one of the last of these systems and includes a Windows-based PC operator interface and Ethernet communications.
The IS200GGXDG1ABB provides analog and fiber-optic feedback hardware needed between the BICI (Bridge Interface Control Board) and a diode source or dynamic braking circuit. The IS200GGXDG1ABB is mounted in the control cabinet. Interfacing of gating commands between the IS200GGXDG1ABB and the BICI board occur via RS-422 transceivers. The IS200GGXDG1ABB receives high-frequency voltage inputs from the GDPA (Gate Driver Power Assembly) board. Seven stab-on connectors are used for grounding.
The IS200GGXDG1ABB is built with three LED indicators, fifteen TP test points, six 3-terminal connectors and three 2-terminal connectors, and four pin connectors. These include a twenty-pin connector (J1) for connection to a NATO board, a six-pin connector (J2,) for connection to a GDPA board, a two-pin connector (J3) for 115 VAC control power, and a fifty-pin connector (PRSC) that functions as an I/O connector with the BICI board. Four duplex connectors (DB1 through DB4) are used for status feedback or firing commands of the DB IGCTs. More information on the board components and their uses may be found through GE publication GEI-100301.
Please review manufacturer publications referencing the IS200GGXDG1ABB for installation procedures. Manuals, user guides, and data sheets were provided by GE. Please follow all safety precautions and handling procedures recommended by the manufacturer.