Siemens Simovert Masterdrives Compendium page 29

12.2010
2 Configuration and Connection
Examples
DANGER
2.1 Compact PLUS type units
2.1.1 Single-axis drive
2.1.2 Multi-axis drive up to 3 axes
CAUTION
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
The device must be disconnected from its voltage supplies (24 V DC
electronics supply and DC link / mains voltage) before the control and
encoder leads are connected or disconnected!
The single-axis drive (see Fig. 2-1 on page 2-2) is used if only single-
drive tasks need to be accomplished or if power equalization through
several axes is either undesired or not possible.
For this purpose, a converter is used that is directly connected to the 3-
phase supply via an external main contactor, a line filter and a line
reactor as necessary. Any regenerative energy is stored in the
capacitor module or reduced in the braking resistor.
In the case of multi-axis drives (see Fig. 2-2 on page 2-3) a converter
(AC-AC) can be combined with inverters (DC-AC). The converter
rectifies the line voltage and supplies the inverters with direct voltage
via the DC link bus module. The power supply integrated in the
converter further provides the 24 V supply voltage for the electronics of
a maximum of 2 inverters.
If more than 2 inverters are connected, the 24 V supply for the
electronics must be provided by an external power supply.
The total rated output currents of the inverters supplied by a converter
must not exceed the rated output current of the feeding converter (in
the case of 6SE7021-0EP50 only half the rated output current).
The regenerative energy generated in one axis can either be used up
by the other motors, stored in the capacitor module or reduced in the
braking resistor.
Compendium Motion Control
Configuration and Connection Examples
2-1