GE Mark VIe · Discrete I/O GE IS200TDBTH2ABC TDBT Discrete Input / Output Terminal Board The IS200TDBTH2ABC is a TDBT terminal board used for discrete field-signal termination within the GE Mark VIe PDIO architecture. The TDBTH2A version is specified for nominal 24 Vdc contact-input wetting voltage and TMR operation. 01 · Product Function TDBT / PDIO The IS200TDBTH2ABC provides the field termination interface for discrete contact signals and relay-controlled outputs in the