Connection to a BEC is optional. If the model is powered by an external BEC, this must be connected to the RUD port. Also the power lead from the ESCs internal BEC must be disconnected.
連接到BEC是可選的。 如果模型是由外面的BEC供電 (即是ESC沒有BEC 或叫OPTO的),則必須將其連接到RUD端口。 此外,ESC內部BEC的電源線必須斷開連接 (如本身的ESC沒有BEC的就不使用斷開)。