IS420UCSBH1A - UCSB Controller | GE Mark VIe | B7B

IS420UCSBH1A is a General Electric UCSB Controller for GE SPEEDTRONIC™ Mark VIe control systems. The UCSB function supports controller operation in turbine control and balance-of-plant applications that use the Mark VIe / Mark VIeS Distributed Control 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 the supported point or channel information as No direct application I/O hosted on controller. The electrical or signal interface is documented as 28 V dc input, Ethernet communications to UDH/CDH/IONet as documented. The documented communications interface uses R, S, and T IONet plus UDH/CDH Ethernet interfaces. Power requirements should be verified in GEH-6721 Volume II for the installed controller form. The documented form factor or mounting style is Panel-mounted controller module. The system architecture should be matched to the documented configuration, including Simplex, Dual, or TMR depending on control configuration. It should be matched with compatible hardware such as JPDC controller power distribution board 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.