Watch this hands-on walkthrough of the IS200TRLYH1B GE Mark VI relay output terminal board. We open the unit, show the plug-in relays, removable barrier terminal block, and MOV surge protection, then explain how TMR 2-out-of-3 voting and coil drive feedback work in the Trip Core. See real installation tips, hot-swap limits, and a cement plant case where it ran without relay failures.