GE IS200STCIH6A IS200STCIH6ADD TMR Contact I/O Terminal Board

The GE IS200STCIH6A IS200STCIH6ADD functions as a TMR Contact I/O Terminal Board within the Mark VI series. This board provides triple modular redundancy for critical contact input and output signals. It ensures fault-tolerant operation through independent voting logic and isolated channels.

Technical Specifications & Redundancy Architecture

This terminal board employs a triple modular redundancy configuration with three independent processing paths. Each path operates separately and votes on output decisions for maximum reliability. Additionally, integrated isolation barriers prevent faults from propagating between redundant channels.

Functional Role in Mark VI Systems

This board handles critical contact inputs from emergency shutdown devices. It also drives contact outputs for critical actuators and protection relays. Consequently, it provides fault-tolerant control for the most demanding turbine protection applications.

The IS200STCIH6A IS200STCIH6ADDincludes dedicated voting circuits that compare signals across all three channels. Moreover, its energy storage module maintains I/O states during power interruptions. Therefore, this design ensures uninterrupted protection even with a single channel failure.

Voting Logic and Fault Tolerance

Engineers value this board for its robust triple redundancy architecture and fault tolerance. The assembly contains 212 individual components arranged for maximum reliability. Its 2-out-of-3 voting scheme prevents single-point failures from affecting system outputs.

Each redundant channel operates independently with isolated power supplies. This configuration allows the board to continue functioning normally after one channel fails. Accordingly, it delivers exceptional reliability for mission-critical safety applications.

Contact I/O Specifications

The input channels accept 24 VDC signals from field devices and sensors. Each input includes debounce filtering to prevent false triggering from contact bounce. Output channels provide relay contacts rated for 2 amps at 30 VDC.

Screw terminals accommodate wire sizes from 22 to 14 AWG for flexible installation. This design simplifies field wiring while maintaining secure connections. Proper termination ensures reliable contact operation across all environmental conditions.

Mechanical Attributes and Durability

This module features a rugged PCB construction suitable for demanding industrial environments. Its 8.1 x 3.6 inch form factor allows straightforward installation into standard Mark VI rack systems. Weighing only 0.84 lbs, this unit provides substantial I/O capacity without excessive mechanical load.

A conformal coating protects all circuitry from moisture, dust, and corrosive contaminants. The General Electric Mark VI series relies on such robust TMR boards for consistent safety system operation. Proper installation ensures optimal fault tolerance across all operational scenarios.