IS400TVBAS2B - TVBA Vibration Termination Board | GE Mark VIeS | B7B

IS400TVBAS2B is a General Electric TVBA Vibration Termination Board for GE SPEEDTRONIC™ Mark VIeS Safety control systems. The TVBA function supports vibration monitoring input 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 TVBAS2B as compatible with the Mark VIeS YVIBS1A and YVIBS1B I/O packs and as including buffered output circuits with DIN and BNC connectors; this revision is not IEC 61508 safety-certified. Unlike the TVBAH#A/TVBAS#A terminal boards, TVBAS2B has the WNPS negative power supply function integrated directly into the terminal board rather than requiring a separate removable WNPS daughterboard. The terminal board accepts 14 sensor inputs providing a direct interface to Eddy-current, seismic, Velomitor, and accelerometer sensors, as well as a dynamic pressure interface to charge amplifiers.

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.