Bosch Rexroth IPC 40.2, Project Planning Manual

Page: 40 / 82

7-10
Connections IPC 40.2
DOK-SUPPL*-IPC*40.2***-PR02-EN-P
DANGER
Danger without protective separation!
⇒
The 24 VDC input voltage must comply with the
requirements of the "Protective separation".
⇒
Plug and unplug the connector only in no-voltage
condition!
PE
0V + 24V
400V + 5%
400V
400V - 5%
L1 L2 L3
sichertrafo.cdr
Fig. 7-12: Safety transformer according to EN 60742
Interfering AC voltage components such as resulting from an uncontrolled
3-phase current bridge connection without smoothing with a ripple factor
(see DIN 40110/10.75, section 1.2) of 5 % are permissible.
It follows from the above that as upper voltage limit the greatest absolute
value is 30.2 V and as lower voltage limit the lowest absolute value is
18.5 V.
t
1,05 x 28,8 V = 30,2 V
Upper limit 28,8 V
0,866 x 30,2 V = 26,1 V
1,05 x 20,4 V = 21,4 V
Lower limit 20,4 V
0,866 x 21,4 V = 18,5 V
30 el
cos (30 ) = 0.866
0
wechsel.cdr
Fig. 7-13: Illustration of the limit values for the 24 VDC voltage