About the IS200TTURH1BBB

The IS200TTURH1BBB Terminal Turbine Board is a printed circuit board whose distinctive hardware features can be clearly interpreted alongside its overall system functions. According to original factory specifications, this card serves two core purposes within the turbine control system:

• Delivering simplex signals to the VTUR Turbine Control Board
• Maintaining stable actuation for the 52G main breaker relay coil of the VTUR assembly

IS200TTURH1BBB Revision Overview

This variant is not the original iteration designed for the Mark VI Turbine Control System. Its predecessor is the base IS200TTURH1 PCB, which does not incorporate the three B-level revisions featured on IS200TTURH1BBB. The three revisions of this board cover:

• Primary functional revision (B grade)
• Secondary functional revision (B grade)
• PCB layout revision (B grade)

The layout revision governs the positioning of discrete circuit traces and electronic components mounted onto the substrate of this circuit board.

IS200TTURH1BBB Part Number & Hardware Features

With its core functions outlined, we can examine the hardware characteristics of this unit. Two pluggable terminal blocks are mounted on the PCB to simplify installation and servicing. Each block supports 24 I/O terminals, offering 48 I/O channels in total for the board. Other key hardware attributes include:

• Noise suppression filters connected to JR1, JS1 and JT1 connectors
• Nominal 125 V DC supply for the breaker coil
• Interface for 12 passive speed pickups
• Standard hardware build
• Three B-level product revisions

All electronic elements on this TTUR terminal board are protected by conformal coating. This chemical coating covers every component and board surface to enhance reliability.