QB50 System Requirements Document

5.9.16 SU_HVARM (0x53) & SU_HVEN (0xC9)NOTE: To enable high-voltage circuitry, the RED-TAG “HV_Disarm” plug MUST beremoved first.The CubeSat access hatch cannot be closed until the RED-TAG plug has beenremoved.In order to turn ON high-voltages, the HV circuit needs to be armed & enabled bycommand. Two separate AND sequential commands have to be sent in order toachieve this:SU_HVARM..followed by:SU_HVENIf there is an ERROR in the command, or the sequence is not sent in the correct order,the SU shall send an HK packet with error flags set, then goto the STDBY state, where,high-voltages are automatically disabled.The “SU_HVARM” command format is:CMD_IDLEN= 0x53= 0x01The “SU_HVEN” command format is:CMD_IDLEN= 0xC9= 0x01