Electric Power Take-Off Interface Requirements for Commercial Vehicles J3253

This SAE Recommended Practice document covers the general guidelines for conductive power transfer of high voltage Direct Current (DC) power between OEM commercial truck chassis electrical systems and electrically powered body accessory equipment. The OEM chassis can have an EV drive train or be a hybrid chassis with or without a connection for traditional mechanical PTO. The chassis can include use of range extension systems. Voltage levels are defined as greater than 60VDC and include typical EV chassis voltage ranges up to and including 1200VDC . It also covers the functional requirements for the connection systems, body builder communication modes including diagnostics, suggested operational modes, system interlocks and isolation management. The scope of the ePTO physical electrical connection will be limited to a recommendation of the interface concept, space claim and service features and will leave connector features and design open for future definition. The scope does not include a definition of connector requirements for connecting a Class 8 tractor to a semi-trailer. This application was reviewed by the Task Force and tabled for future development. The scope also does not include high-cycle connections or other applications where the connections to ePTO are seperated outside of annual maintenance inspections.