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GE IS200TBCIH1BBC | Mark VI TMR Contact Input Terminal Board
The GE IS200TBCIH1BBC is a TBCI contact input terminal board for GE Mark VI turbine-control systems. It provides termination for 24 dry-contact inputs and is commonly associated with TMR—triple modular redundant—control-system configurations.
The board interfaces field switches, relay contacts, permissive signals, interlocks, and protection contacts with GE Mark VI I/O hardware. It is suitable for turbine-control maintenance, system replacement, troubleshooting, and spare-parts support.
The TBCIH1B family uses two removable barrier-type terminal blocks, each serving part of the 24-input interface. GE documentation describes the TBCI architecture as supporting simplex and TMR configurations, with PDIA I/O packs used in Mark VIe installations.
Technical Details
Item Description
Manufacturer General Electric
Part number IS200TBCIH1BBC
Related part number IS200TBCIH1B
Board designation TBCI
Product type Contact input termination board
Input type Dry-contact / discrete input
Typical input count 24
System family GE Mark VI / Mark VIe
Redundancy TMR configuration; verify system architecture
Terminal blocks Two removable barrier-type terminal blocks
Associated I/O hardware PDIA I/O packs or compatible Mark VI I/O interface
Condition New surplus, refurbished, rebuilt, or used
Main Features
GE IS200-series Mark VI control hardware.
24 dry-contact input channels.
Designed for contact switches, relays, interlocks, and protection signals.
Supports TMR turbine-control architectures.
Two removable terminal blocks for field wiring and maintenance.
Provides terminal termination between field circuits and control-system I/O.
Suitable for GE Mark VI and related Mark VIe system configurations.
The two terminal blocks are described as having 24 terminals each in the TBCI family documentation, with the actual input assignment depending on the system configuration and wiring design.
TMR Application
In a TMR Mark VI system, the TBCI terminal board can distribute field contact signals to redundant control paths. The exact connector use depends on whether the board is installed in a simplex, dual, or TMR architecture.
Supplier documentation identifies:
Two terminal blocks connected to the 24 dry-contact inputs.
Excitation-voltage connections through JE1 and JE2.
JR1 used for simplex arrangements.
Additional connectors used in TMR arrangements.
Shield terminals connected to chassis ground.
Always use the approved GE wiring diagram for the installed system. Terminal-board connections can differ based on the I/O pack, cabinet design, and redundancy level.
Replacement Guide
Before replacing IS200TBCIH1BBC, verify:
The complete part number, including H1BBC.
Whether the system is simplex, dual, or TMR.
The installed PDIA I/O pack and cable arrangement.
The terminal-block labels and field-wire assignments.
Contact-excitation voltage and common-return wiring.
Connector positions, including JE1, JE2, and JR1 where applicable.
Shielding and chassis-ground connections.
Board revision, artwork number, and serial-number label.
Required contact-input simulation and redundancy testing.
The final C in the part number is important. GE documentation indicates that C-version terminal boards provide the mechanical alignment needed for certain Mark VIe I/O-pack installations. Do not replace an H1BBC board with an H1B or H1BCE board without confirming mechanical and electrical compatibility.
Related Models
Model General description
IS200TBCIH1B Contact input terminal board family
IS200TBCIH1BBC TBCI board with H1B configuration and C-version interface
IS200TBCIH1BCE Related C-version contact terminal board; verify exact application
IS200TBCIH2C Related TBCI terminal-board variant
IS200STCIH2A Simplex contact-input terminal board, not automatically interchangeable
The similar model numbers do not guarantee interchangeability. Confirm input wiring, redundancy, connector alignment, I/O pack, and system revision.
Important Technical Note
Some supplier pages publish unsupported values such as 250 VAC/DC and 10 A per input channel. These figures are not consistent with the typical function of a dry-contact input terminal board and should not be used as engineering specifications.
For accurate SEO content, use this conservative description:
GE IS200TBCIH1BBC is a 24-channel contact input termination board for GE Mark VI turbine control systems. It is commonly used in TMR configurations and interfaces field dry-contact signals with compatible GE I/O hardware.
Avoid publishing exact voltage, current, isolation, channel-wetting, or protection specifications unless verified from GE documentation.
Ordering Information
Include the following details in a quotation request:
Complete part number: IS200TBCIH1BBC.
Required quantity.
System configuration: simplex, dual, or TMR.
Associated I/O pack model.
Preferred condition: new, surplus, refurbished, rebuilt, or used.
Photos of the board label, terminal blocks, connectors, and mounting side.
Test report and warranty requirements.
Destination country and shipping terms.
A strong product page should include real inventory photographs, terminal-block details, board markings, condition, test status, warranty, and lead time.
Frequently Asked Questions
What is GE ?
GE IS200TBCIH1BBC is a TBCI contact input termination board for GE Mark VI turbine-control systems.
How many inputs does it support?
The TBCI family is commonly specified with 24 dry-contact inputs. Confirm the exact field assignment from the system drawings.
Is it a TMR board?
It is commonly marketed for TMR Mark VI applications, but TBCI boards can support different system configurations depending on the associated connectors, cabling, and I/O architecture. Verify the installed system before ordering.
What devices connect to it?
Typical devices include dry-contact switches, relay outputs, limit switches, permissive contacts, interlocks, and turbine-protection contacts.
Is IS200TBCIH1BBC interchangeable with IS200TBCIH1B?
Not automatically. The C-version and complete suffix may affect mechanical alignment, connector configuration, or Mark VIe compatibility. Confirm the exact hardware revision and system documentation.
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