Chapter 5 Main Circuit Terminals MS300 5-1 Main Circuit Diagram Figure 5-5 Table 5-1 5-5 Terminals Descriptions R/L1, S/L2 Mains input terminals (one-phase) R/L1, S/L2, T/L3 Mains input terminals (three-phase) U/T1, V/T2, W/T3 AC motor drive output terminals for connecting three-phase IM and PM motors. +1, +2 Connections for DC reactor to improve the power factor. Remove the jumper before installing a DC reactor. DC+, DC- Connections for brake unit (VFDB series) Common DC bus B1, B2 Connections for brake resistor (optional). Refer to Section 7-1 for details. Ground connection; comply with local regulations.