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Artifact: Pyro Continuity Verification Box (PCVB), Earth Landing, Apollo Command Module, Block II

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Identifier: A20120018
Artifact Category: Spacecraft Hardware
Period of Employment: October 11 1968 to July 24 1975
Manufacturer: Autonetics (North American Aviation)
NASA Contract Number: NAS9-150
Spacecraft/Launch Systems: Apollo Command Module
Materials:

Aluminum, Copper, Steel, High Temperature RTV

Dimensions: 9.75 x 10 x 3.25 (Inches)
Weight: 8.5 Pounds (estimated)
Flight Vehicle System or Component: Sequential
Program: Apollo
Flown Status: Undetermined
Description:

An Apollo Command Module Earth Landing Pyro Continuity Verification Box (PCVB), operated in series with the Earth Landing Sequence Controller (ELSC), provisioned to monitor the pyrotechnics responsible for jettison of the Apex Cover (forward heatshield), and deployment mortars associated with the Drogue and Pilot parachutes. The box includes a Ground Support Equipment (GSE) access connector for ground checkout of ELS pyrotechnics. This unit was a subsystem of the SECS (Sequential Events Control System).

System redundancy was achieved in a single unit (unlike the MESC/ELSC which had two boxes per subsystem).

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