IS200TDBTH6A GE Mark VI Discrete Input/Output Terminal Board 24 Number Of Channels

IS200TDBTH6A GE Mark VI Discrete Input/Output Terminal Board 24 Number of channels

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The GE IS200TDBTH6A is a Discrete Input/Output Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in Distributed Control Systems. The Discrete Input/Output (TDBT) terminal board is a flat or DIN-rail mounted TMR contact input/output terminal board. A nominal 24, 48, or 125 V dc wetting voltage can be provided to the TDBT board's 24 group isolated contact inputs from an external source. The noise suppression on the contact inputs guards against surges and high-frequency noise. In order to increase relay functionality, TDBT offers 12 form-C relay outputs and accepts an option card.

The onboard signal conditioning and contact input function are identical to those on STCI and are scaled for 24, 48, and 125 V dc wetting voltage. 16 to 32 V dc, 32 to 64 V dc, and 100 to 145 V dc, respectively, make up the input wetting voltage range. The wetting voltage is half of the threshold voltage.

The description of the I/O pack includes a diagram of the touch-sensing circuitry. On the first 21 circuits and on circuits 22 through 24, contact input currents are resistance limited to 2.5 mA and 10 mA, respectively. Using resettable polymer positive temperature coefficient fuses, the 24 V dc supply of TDBTH2 is currently limited to 0.5 A.