IS420UCSBS1A - UCSB Safety Controller Module | GE Mark VIeS | B7B

IS420UCSBS1A is a General Electric UCSB Safety Controller Module for GE SPEEDTRONIC™ Mark VIeS Safety control systems. The UCSB function supports stand-alone safety controller 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 the UCSB controller family as a product line of stand-alone computers that run application code, mounting in a panel and communicating with I/O packs through on-board I/O network (IONet) interfaces using the QNX Neutrino real-time operating system; unlike traditional backplane-based controllers, the UCSB does not host any application I/O. This revision, UCSBS1A, is documented as the Mark VIeS Safety controller used for functional safety loops achieving SIL 2 and SIL 3 capability and is IEC 61508 certified. GE documentation lists the UCSBS1A microprocessor as a 600 MHz Intel EP80579, with power requirements of 26.7 W peak / 15.6 W nominal, a weight of 2.4 lb (1 kg), and an ambient rating for enclosure design of -30 to 65°C; this revision has no cooling fan.

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.