User Guide of EM730 Series Inverter 3.2.2 Functions of main circuit terminals The functions of the main circuit terminals of the EM730 series inverter are shown in the following table. Please connect wires correctly according to the corresponding functions. 3.2.3 Standard wiring diagram of main circuit The standard wiring diagram of the main circuit of the EM730 series inverter is shown in Fig. 3-3.
Wiring of built-in brake unit Wiring of external brake unit Braking resistor (optional) Br a k in g r e s is t o r (o p t io n a l ) Br a k in g u n i t (o p t io n a l ) PB R S U V M R S U V M W T T W Fig.3-3 Standard Wiring of Main Circuit 3.2.4 Input side wiring of main circuit The input cable, output cable and inverter itself generates RF interference, which can be reduced by installing noise filters on the input and output sides and shielding the inverter body with an iron box, as shown in Fig. 3-4.
21 Terminal label Function description R/L1, S/L2, T/L3 AC power input terminal, connected to three-phase AC power supply (the single-phase power input terminal can be connected with any two terminals) 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 t Braking resistor terminal, with one end of the braking resistor connected to and he other end to PB P, DC reactor terminal, for the external DC reactor of EM730/EM730E-090-3 and above Grounding terminal, connected to earth