User Manual of A90 Series Inverter 3.2.2 Functions of main circuit terminals The functions of the main circuit terminals of the A90 series inverter are shown in Table 3-1. Please connect wires correctly according to the corresponding functions. Table 3-1 Functions of Main Circuit Terminals 3.2.3 Standard wiring diagram of main circuit Fig. 3-3. The standard wiring diagram of the main circuit of the A90 series inverter is shown in A90-4T1R5B to A90-4T045B A90-4T060 to A90-4T304 Braking resistor (optional) Braking resistor (optional) PB Braking unit (optional) R U S V M R S U V M W T T W Fig.
3-3 Standard Wiring of Main Circuit 29 Terminal label Function description R, S, T AC power input terminal, connected to three-phase AC power supply U, V, W AC output terminal of the inverter, connected to three-phase AC motor Positive and negative terminals of the internal DC bus, connected to external braking unit , PB Braking resistor terminal, with one end of the braking resistor connected to and the other end to PB P, DC reactor terminal, for the external DC reactor of A90-4T176 and above Grounding terminal, connected to earth