The Thermocouple Input (TBTC) Terminal Board IS200TBTCH1C is part of the Mark VIe Series produced by General Electric. This board will accept T, S, K, J, and E main twenty-four-type thermocouple inputs. If this board is used with a PTCCH2 board in simplex systems the board can accept an additional three thermocouple inputs labeled as R, B, and N. There are two TBTC models, this model being the IS200TBTCH1C indicates that it has two DC-type connectors and will only be used in simplex applications. This board will use two PTCC packs and thus allows for twenty-four inputs.
When connecting the IS200TBTCH1C board as part of the Mark VIe series the I/O packs used will correct directly into the TBTC J-type connectors, the cables needed will also depend on the redundancy level required of the board. One feature of this board is that the thermocouple inputs on this board can be ungrounded or grounded. The inputs can be up to nine hundred and eighty-four feet away from the turbine control panel. The attached I/O processor on this device will perform the analog-to-digital linearization and conversions for the individual thermocouple inputs.
The thermocouple inputs of the IS200TBTCH1C board can support a wide input range which is from negative eight volts to up to positive forty-five volts. This board has cold junctions which operate in a potential range of negative twenty-two degrees to one hundred forty-nine degrees Fahrenheit. The cold junctions or CJ signals are available for monitoring by going into the signal space.