Introduction to the manual 15
UPS Uninterruptible power supply; power supply equipment with battery to
maintain output voltage during power failure
ZCU Type of control unit used in ACS860 drives (primarily in drive modules, or
inverter/supply units consisting of a single power module). Consists of an I/O
board built into a plastic housing.
Depending on the type of hardware, the control unit may be integrated into or
fitted onto the drive/inverter module, or installed separately.
Term/abbre-
viation
Definition
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