The GE IS200TTURH1BCC is a Primary Protection Input Board in the Mark VI critical for gas, steam, and wind turbine control. As a turbine terminal board, it interfaces with the turbine I/O processor, managing key inputs/outputs, have 12 passive pulse rate devices, generator/bus voltage signals from potential transformers, 125V DC output for the main breaker coil, and shaft voltage/current sensor inputs.

It features relays K25, K25P, and K25A—all must close to supply 125V DC to the main breaker. Connectors include JR5 (speed signals to VTUR), JR1, and additional connectors for TMR systems. Installation involves wiring to terminal blocks TB1/TB2 and using jumpers JP1/JP2 to switch between Simplex and TMR configurations. TB3 supports optional TTL connections to active speed pickups.

Features:
Multifunctional I/O: Handles speed measurement, voltage monitoring, breaker control, and shaft signal processing, essential for turbine operation.

Redundancy Support: Configurable via jumpers for Simplex or TMR systems, with TMR using six connectors for fault tolerance.

Critical Relays: Relays K25, K25P, K25A enable main breaker operation, ensuring safe power distribution.

Flexible Connectivity: Includes D-shell connectors, terminal blocks, and TB3 for TTL, adapting to diverse sensor/device inputs.

Mark VI Compatibility: Integrates with Mark VI/VIe systems, supporting gas, steam, and wind turbines—an upgrade over Mark V’s limited applications.