Start-Up
2-2 SINUMERIK 801
Start-Up
U V W
380VAC
220VAC
0V
220/24 DC
Power
Supply
PC
L
N
PE
1)
2,3)
PE
CNC
L+
M
24V
0V
220VAC
0V
PE
PE
PE
L
N
L+
M
3)
3) 3) 3)
3)
PE rails
Fig. 2-1 Connecting the control transformer
Notes (for Fig. 2-1):
1) Two phases of U，V，W that are not used by the drive transformer;
2) Connections can not be made until PE rails are found well grounded.
3) In order to ensure a good grounding, the cross-sectional area of PE rails
shall be not less than 6mm
2
.
Notice
The control transformer will not be provided by Siemens. Customer may
order it from other sources.
Drive transformer Use a separate drive transformer in the cabinet to supply the 85VAC power
supply for stepper drives. Connections with the drive transformer are shown
in Fig. 2-2.
Fig. 2-2 Connecting the drive transformer
4)
PE rails
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