A90 series Inverter User Guide 3.2 Power terminal connections 3.2.1 Examples of the power terminal W V U T S R + _ PB a) small and medium power terminal, b) high-power terminal diagram, part of the part of the terminals slightly different terminals slightly different Figure 3-2 Power Terminal Block 3.2.2 Power Terminal Functions Please correctly wire terminals according to functions. 3.2.3 Standard Wiring of Power Terminal A90-4T1R5B ～ A90-4T045B A90-4T060～A90-4T304 Braking resistor Braking resistor（optional） PB (optional) Braking unit(optional) R U R U S W T V M S T W V M Figure 3-3 Standard Wiring of Power Terminal 15 R S T + - U V W Terminal No.
Function Description R, S and T AC power supply input terminals, to connect to 3-phase AC power supply.No phase sequence requirement. U, V and W AC output terminals , to connect to 3-phase AC motor. Consider the phase sequence requirement. Positive and negative terminals of internal DC bus, to be connected to the external brake unit. and P DC reactor connection terminals，only used of A90-4T176 and above models. and PB Brake resistor connection terminals, one end connected to and the other end to PB. Grounding terminal.