EM500 Open-Loop Vector Control Inverter User Manual 3.2 Wiring Main Circuit Terminals 3.2.1Main Circuit Terminal Block The main circuit terminals of EM500 comprise the following parts: 3-phase AC input terminals: R, S and T Grounding terminal: DC bus terminal: 、 Wiring terminal for energy consumption braking resistor: ， PB Wiring terminals of motor: U, V and W See Figure 3–2 for main circuit terminal block. W V U PB T S R + _ a) Main Circuit Terminal Block of Models 0.75 - 7.5 kW W V U PB T S R + _ b) Main Circuit Terminal Block of Models 11 - 18.5 kW c) Main Circuit Terminal Block of Models 22 – 37 kW 36