IS200TRLYH1B GE Mark VI

The IS200TRLYH1B is a relay output terminal board (TRLY) that serves as the physical interface for auxiliary control and trip output functions within the system.

This board is located in the Trip Core (<T>) of the Mark VI control cabinet. As a passive terminal board, it does not perform logical operations but instead receives control commands from the VCCC (VME Controller Communication Card), VCRC, or VGEN boards.

The board supports both simplex and triple-redundant (TMR) configurations. In TMR mode, each of the three cores (R, S, and T) is equipped with an independent TRLY board; a hardware 2-out-of-3 voting mechanism ensures that a failure in any single core or a single cable will not cause auxiliary equipment to malfunction.

• Voting Coil Drive Feedback: Monitors coil current in real time to promptly detect silent failures.
• Plug-in Relays: Individual relays can be quickly replaced, reducing repair time.
• TMR Path Physical Isolation: R/S/T are arranged on separate boards; a single-core failure does not affect the "two-out-of-three" voting mechanism.
• MOV Surge Suppression Protection: Absorbs voltage spikes generated by switching inductive loads.
• Removable Barrier Terminal Block: The entire terminal block can be plugged in or unplugged as a unit; replacing the block does not require disconnecting individual wires.
• Real-time Contact Status Monitoring: Immediately triggers an alarm when the command does not match the contact status.

In the trip protection chain of the Mark V system, the DS200TCTGG1A does not operate in isolation. It typically works in conjunction with the following boards to form a complete protection and execution system:

• DS200TCQA Board: Provides PTR trip signals and synchronization commands; it serves as the upstream signal source for the TCTG.
• DS200TCEA Board: Manages emergency trip relays (ETRs) and handles core-level emergency action logic.
• DS200TBRG Series Trip Terminal Boards: Receive drive signals from the TCTG board, interface with external high-power trip relays, and execute the final fuel/steam shutdown actions.
• DS200PTBA Board: Provides busbar and generator signals and participates in signal acquisition for synchronization relays.

A waste heat power generation project at a cement plant uses the IS200TRLYH1B to drive boiler ash-removal valves, cooling fan contactors, and alarm indicator lights. The board's high isolation and high-power output capabilities ensure long-term, stable operation in the dusty and vibrating environment of the cement plant; since the system was commissioned, there have been no shutdowns caused by relay board failures.

• IS200STCIH2AED
• IS200STAIH2A
• IS200STAIH2ABA
• IS200STAIH2ACB
• IS200STCIH2A
• IS200STURH2AEC
• IS200TAMBH1ACB
• IS200TBAIH1C
• IS200TBAIH1CCC
• IS200TBAIH1CDC
• IS200TBAOH1CCB
• IS200TBCIH1BBC
• IS200TBCIH1B
• IS200TBTCH1CBB
• IS200TBTCH1C
• IS200TDBTH6A
• IS200TDBTH6ACD