IS200TRLYH1F

About the IS200TRLYH1F

The IS200TRLYH1F is board component made by GE for the Mark VI.  The MKVI, which is one of the last of GE’s Speedtronic systems for gas/steam turbine management, is designed to bring the turbine from zero speed to operating speed through automatic sequencing of control signals.   A primary part of this is acceleration control, which allows the turbine smooth acceleration from that zero point to synchronous speed.

The IS200TRLYH1F is a Relay Output terminal board with TMR contact voting.  The board has twelve sealed relays in each TMR section, with a total of thirty-six relays on the board.  The contacts from R/S/T combine to form a voted Form-A (NO) contact. The board accepts 24/125 V dc or 115 V ac power.   It is important to note this board does not support simplex applications. Also, the board does not have power distribution but can have an optional power distribution board (IS200WPDFH1A) added.

The IS200TRLYH1F is controlled by the VGEN, VCRC, or VCCC board.   It is populated by thirty-six sealed relays (previously mentioned,) two terminal boards (TB1 and TB2,)  three DC-37 pin connectors (JR1/JS1/JT1,) and two DC-64 pin connectors (J1 and J2,) that both connect to optional power distribution daughterboards.   Relay drivers mounted on the board drive relays at the necessary frame rate.

The IS200TRLYH1F has no jumpers or hardware settings.  Several diagnostics are run on the board, including voltage to each relay coil, voltage across each solenoid power supply, and reading of the board’s ID chip for mis-match.  Manufacturer publications will provide more information on the function and configuration of the board.