IS400JPDHG1A - JPDH HD 28 V Power Distribution Board | GE Mark VIeS | B7B

IS400JPDHG1A is a General Electric JPDH HD 28 V Power Distribution Board for GE SPEEDTRONIC™ Mark VIeS Safety control systems. The JPDH function supports high-density power distribution operation in turbine control and balance-of-plant applications that use the Mark VIeS 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 JPDH as a board that provides 28 V dc power to up to 24 Mark VIe I/O modules and three Ethernet switches from a single 28 V dc supply, with additional JPDH boards able to be daisy-chained to power more I/O modules as required. Each I/O module output circuit is protected with a positive temperature coefficient fuse device, and the board's 6-pin J1 connector brings in three separate 28 V dc feeds (R, S, and T) for triple redundancy, with eight output circuits fed from each of the three buses. It should be matched with the compatible Mark VIe I/O modules and Ethernet switches where that pairing is used in the site configuration.

This component is typically considered when troubleshooting Mark VIeS Safety 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.