IS200TREGH2B

About the IS200TREGH2B

The IS200TREGH2B is a PCB board component created by GE for the Mark VI system.  The Mark VI was one of the last of the Speedtronic series of gas and steam turbine management systems released by GE.  The MKVI includes integrated redundant backups on things like turbine flame detection, shaft voltage monitoring, and speed input monitoring.

The IS200TREGH2B is a Gas Turbine Emergency Trip terminal board.  This card provides power to three emergency trip solenoids. It is controlled by the I/O controller.  This board works in conjunction with a TRPG board. The IS200TREGH2B provides the positive side of the dc power to the emergency trip solenoids while the TRPG provides negative power.   There are several versions of the TREG board; this version is designed for use in 24 V dc applications with control power from board connectors (JX1, JY1, and JZ1) being diode combined to create redundant power for status feedback circuits and power for economizing relays.    

The IS200TREGH2B is designed with twelve relays placed on the board in two lines of six.  Nine of these form three groups of three to vote inputs controlling the trip solenoids. The board has an additional four smaller relays that provide other board functions.  The board has three D-type (female) connectors located along the rear edge of the board. It has several plug connectors, including a 2-position, a 3-position, and a 12-position plug.   The board has two terminal boards (TB1 and TB2,) placed side by side along the front edge. The board is also populated by multiple metal oxide varistors (MOVs) and a 10 Ω, 70 W economizing resistor.  These components are used for current suppression.