u Main Circuit Connection DiagramRefer to diagrams in this section when wiring the main circuit of the drive. Connections may vary based on drive capacity.The DC power supply for the main circuit also provides power to the control circuit.NOTICE: Do not use the negative DC bus terminal “–” as a ground terminal. This terminal is at high DC voltage potential. Improper wiringconnections could damage the drive.NOTICE: Route motor leads U/T1, V/T2 and W/T3 separate from all other leads to reduce possible interference and noise related issues.Failure to comply may result in abnormal operation of drive and nearby equipment.n Three-Phase 200 V Class Models 2A0004 to 2A0081Three-Phase 400 V Class Models 4A0002 to 4A0044Three-Phase 600 V Class Models 5A0003 to 5A0032+1+2–R/L1S/L2T/L3RelayGate board Controlboard Operator+CurrentsensorU/T1V/T2W/T3B1 B2Figure i.13 Connecting Main Circuit Terminalsn Three-Phase 200 V Class Models 2A0110, 2A0138Three-Phase 400 V Class Models 4A0058, 4A0072Three-Phase 600 V Class Models 5A0041, 5A0052+1–R/L1S/L2T/L3U/T1V/T2W/T3B1 B2DC linkchoke+RelayGate board Controlboard OperatorCurrentsensorFigure i.14 Connecting Main Circuit Terminalsi.4 Electrical Installation22 YASKAWA TOEP YAIP1W 02E YASKAWA AC Drive - iQpump1000 Installation & Start-up Guide