2020-2021 Team Documents


The relay board is located in the high voltage region of the CarMan enclosure. It is used to create the current path from the battery packs to the motor controller, which then powers the motor. Relays on the relay board such as the pre-charge relay are controlled by the TSI board that operates in compliance with the rule. Besides that, the TSI board also measures high voltage current, and HV+ / HV- / MC+ differential voltages from the relay board.


Relay Board Layout and Drawings

  • Relay Board Electrical Drawing (PDF) (Last Updated: 03/21/2021)
  • Assembly Drawing For Relay Board (PDF) (Last Updated: 2/24/2021)
  • Base Plate Drawing (PDF) (ZIP) (Last Updated: 2/24/2021)
  • Assembly Drawing For Garolite Spacers (PDF) (Last Updated: 2/24/2021)
  • Short Garolite Spacer For HV+ Bus Bar v2 (PDF) (Last Updated: 2/24/2021)
  • Tall Garolite Spacer For HV- Bus Bar v2 (PDF) (Last Updated: 2/24/2021)
  • Garolite Cover For Relay Board Plate (PDF) (Last Updated: 03/22/2021)