Landing Field Contacts on the IS200TBCIH1B

Every discrete signal a Mark VI turbine control watches — a breaker auxiliary, a pressure or limit switch, a lube-oil permissive, a hand-station push-button — has to be wired somewhere physical, and on this hardware that place is the IS200TBCIH1B contact input terminal board. Two barrier-type terminal blocks accept the field pairs for up to 24 dry contacts, each terminal taking wire as large as #12 AWG, and each block unbolts from the board on two screws so a technician can service or swap the termination without rewiring from scratch. The board wets the contacts with a DC excitation voltage and filters the incoming signals against surge and high-frequency noise, so a long, electrically noisy field run does not register as chatter.

From Terminal Block to Control Processor

Once landed and conditioned, the contact states leave the IS200TBCIH1B over its connectors. In a Mark VI (VME) system, molded-plug cables carry them to the contact-input processor in the VME rack (GE’s VCCC or VCRC). In a Mark VIe system, PDIA discrete-input packs seat directly on the board. A simplex point is served through connector JR1 alone; a triple-redundant point uses JR1, JS1 and JT1 so the <R>, <S> and <T> channels each get an independent read of the same field contact.

The Fault Is Usually Upstream of the Board

Because the board only terminates and filters, it is rarely the root cause of a bad input. Trace the problem before ordering: a single stuck point is almost always the field device, a loose ferrule, or moisture at a junction; a group of points lost together implicates the PDIA pack or VME processor and its cable; a uniform reading across all points suggests the excitation supply; and flaky behavior after work in the cabinet usually means a connector needs reseating. Swap the board itself only when you can see damage — a cracked barrier block, corroded or scorched terminals, or heat distress near the filter components.

IS200TBCIH1BBC: Group, Revision, and Why the Full Number Counts

The base IS200TBCIH1B breaks down as the IS200 Mark VI series, the TBCI contact-input function, the H1 hardware group (documented at 125 V dc excitation), and the B functional revision; the full number IS200TBCIH1BBC adds the BC artwork revision. Boards that differ only in those final two letters are close siblings, but connector keying and the ID device a pack reads track the exact revision, so quoting the complete number avoids a near-miss. The GE Speedtronic Part Number Decoder maps every character.

Related Mark VI Discrete-I/O Hardware

The IS200TBCIH1B belongs to the Mark VI discrete-input tier and works with the VCRC/VCCC VME processors or PDIA packs and the matching relay-output and analog terminations. Sites migrating from older equipment should review Mark V vs Mark VI: DS200 to IS200, since Mark V contact boards will not serve this rack. Explore the wider range in the GE Mark VI IS200 Boards collection.

Information We Need to Quote

Send the full part number and suffix (IS200TBCIH1BBC), the revision on the printed label, a photo of that label, the turbine model and Mark VI generation served, the quantity, and your urgency. A quick photo of the board’s terminals and connectors lets us verify a match before dispatch.

Get a Quote for the IS200TBCIH1BBC

This IS200TBCIH1B ships worldwide DDP, is quoted within 24 hours, and can be purchased against a PO from qualified end users and EPC contractors. Choose Request a Quote, add your quantity, and we will come back with availability and lead time.

IS200TBCIH1BBC Reference Details

General Information about the Product
Part Number	IS200TBCIH1B Mark VI IS200
Description	IS200TBCIH1B by GE IS200TBCIH1BBC Input Terminal Circuit Board Mark VI IS200
Condition	used Cleaned and Tested. With 1 Year Warranty