Reliance Electric 803623-R Battery Backup Unit

Reliance Electric 803623-R Battery Backup Unit is a backup power module designed for Reliance Electric AutoMax rack-mounted DCS drives. The part number 803623-R identifies it as the dedicated battery backup unit for these drives, and it is equipped with a tester button to verify the backup circuit on-site. Some listings note that the 803623-R ships without batteries, so customers must source the appropriate cells separately. This accessory is used in legacy Reliance Electric drive systems to provide backup power to the drive’s circuitry during power interruptions, enabling a controlled shutdown and helping preserve drive configuration and operation.