Description

Brief Product Description

The General Electric IS200TBCIH2BBC is a high-density contact input terminal board engineered for the Mark VIe Distributed Control System (DCS). It provides 24 dry contact voltage inputs with integrated optical isolation and hardware filtering to ensure reliable signal acquisition in turbine control environments.

Product Description

Industrial Signal Processing and Isolation

The General Electric IS200TBCIH2BBC serves as a critical interface for discrete signal acquisition within the Mark VIe control platform. This terminal board manages 24 dry contact channels, utilizing DC power for contact excitation. To maintain signal integrity in electrically noisy industrial settings, the module employs optical isolators that provide robust group isolation between the field wiring and the sensitive controller logic. Furthermore, integrated hardware filters with a 4 ms time constant effectively suppress high-frequency interference and voltage surges, ensuring that only clean, debounced signals reach the processor.

Configuration and System Compatibility

Designers engineered the IS200TBCIH2BBC for maximum system flexibility, supporting simplex, dual, and Triple Modular Redundant (TMR) architectures. The board features three dedicated ports—JR1, JS1, and JT1—which allow for direct cabling to one, two, or three PDIA I/O packs simultaneously. This redundancy capability makes the board an essential component for high-availability turbine control applications where downtime is not an option. Transitioning from older hardware is simplified by the “C-version” mechanical alignment, which ensures the board fits perfectly within standard Mark VIe mounting envelopes while offering improved electrical performance over previous iterations.

Field Wiring and Installation

The IS200TBCIH2BBC terminal board facilitates easy installation through two heavy-duty barrier-type terminal blocks. These blocks accommodate field wiring up to #12 AWG, providing secure connections for long-term operation. The input structure designates the first 21 channels for standard 2.5 mA loads, while the final three channels support 10 mA loads to accommodate remote solid-state electronics. Additionally, dedicated shield terminal strips link directly to the chassis ground, providing a path for electromagnetic interference (EMI) to dissipate without affecting the control signals.

Technical Specifications