The IS200TRESH1A is a device known as an emergency trip terminal board. This is a type of printed circuit board or PCB. The IS200TRESH1A is one of the many components in the Mark VI series. Mark VI and the other series in the Mark lineup have been used for the control and automation of industrial gas and steam turbines. The Mark family’s oldest series, called Mark I, was debuted as early as 1969.
The IS200TRESH1A features a variety of electronic components ranging from tiny to very large. The largest components on the IS200TRESH1A are two (2) black terminal blocks. Both terminal blocks may contain up to twenty-four (24) silver metal terminals which are identified with the numbers one (1) to forty-eight (48) with white writing. Three (3) large relays or contactors have been positioned in the middle of the IS200TRESH1A. These relays are covered with clear plastic that are labeled with information on the component including its voltage and part number. Many large MOVs or metal oxide varistors have been placed on the IS200TRESH1A. At least nine (9) of these MOVs may be found on the left and top of the device lined up in rows. Many very small resistors have been lined up in vertical rows in various places on the IS200TRESH1A. These resistors feature bands that are blue, white, and black. Sitting at the top edge of the IS200TRESH1A are two (2) white connectors. Each of these connectors contains a group of twelve (12) ports which may be used for connecting extra components to the IS200TRESH1A.