IS200WROBH1A - WROB Relay Output Option Board | GE Mark VIe | B7B

IS200WROBH1A is a General Electric WROB Relay Output Option Board for GE SPEEDTRONIC™ Mark VIe control systems. The WROB function supports relay output power distribution operation in turbine control and balance-of-plant applications that use the Mark VIe Terminal Board and I/O Hardware. It should be matched to the installed catalog number, hardware form, and cabinet configuration before it is used as a replacement.

GE documentation identifies WROB as an option board that turns the relay portion of a TDBS terminal board into the functional equivalent of an IS200TRLYH1B relay output board, providing fused and sensed power distribution to the first six relay outputs plus dedicated power to the last relay output. The electrical or signal interface supports either ac or dc incoming wetting voltage. It should be matched with compatible hardware such as the TDBSH2A, TDBSH4A, or TDBSH6A terminal boards where that pairing is used in the site configuration.

This component is typically considered when troubleshooting Mark VIe hardware, replacing a failed module, evaluating repair options, or maintaining spare inventory for turbine control systems. Before installation, verify the catalog number, hardware revision, and associated terminal board or I/O pack configuration against site documentation and OEM requirements. The OEM reference for this listing is GEH-6721 Vol I; GEH-6721 Vol II.

Control system parts are provided by GTC Control Solutions, Inc., a wholly owned subsidiary of B7B. Parts are offered in unused, repaired, or remanufactured condition, subject to availability. Each repaired or remanufactured component undergoes comprehensive functional testing in energized panels to guarantee reliability and performance. We provide detailed test reports and warranties with every repair, giving you confidence in the quality and longevity of your replacement parts.