Saturn V Instrument Unit Computer Interface Unit, measuring 10.75″ x 6″ x 11″, with the top plate bearing a NASA George C. Marshall Space Flight Center parts tag that reads: “Computer Interface Unit, Assy. No. 60Z13007-001, Mod. No. 501, Contr. No. NAS8-14000, Accept Date 12-5-69, Serial No. 031, WT (LB) 13.00, Mfd. By Space Craft, Inc.” The front of the unit bears three ports and the back side contains two; one side of the housing features raised part numbers: “CSTG 50M67802-1.” In fine condition, with various scuffs and marks.
The Saturn V Instrument Unit (IU) Computer Interface Unit (CIU) was a component of the Instrument Unit of the Saturn V rocket used during the Apollo program. The Instrument Unit served as the "brains" of the Saturn V rocket, controlling its guidance, navigation, and control systems.
The Computer Interface Unit (CIU) was responsible for facilitating communication and data exchange between the various onboard guidance and navigation systems and the central computer of the Instrument Unit. The central computer, known as the Instrument Unit Guidance Computer (IUGC), was a digital computer that performed critical calculations for guiding the rocket along its intended trajectory.
The CIU acted as an interface between the analog and digital systems within the Instrument Unit. It converted analog sensor readings (such as those from gyroscopes and accelerometers) into digital signals that the central computer could process. Additionally, it transmitted commands from the central computer to various components of the rocket, including the engines, to control its orientation and trajectory during flight.
From The Peter Gerry Collection.
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