PCR-LE series supports the master-slave parallel operation with up to five units or a total power of 27 kVA, excluding PCR500LE and PCR1000LE. This can be achieved by utilizing the optional PD05M-PCR-LE (parallel operation driver for a master unit) and PD05S-PCR-LE (parallel operation driver for slave units). It is also possible to mix different models in parallel. For the details, read the setup guides of PD05M-PCR-LE/PD05S-PCR-LE.