Bosch Rexroth Rho 4.0 Connectivity Manual page 39

1070072365 / 04 RhoMotion
Electrical Connections
Safety transformer, as per EN 60742:
400V +5%
400V
400V −5%
0V
Offset AC components of the type produced by an unregulated rotary
current bridge circuit without smoothing, with a ripple factor of 5% (refer
to DIN 40110/10.75, section 1.2), are permissible. As an upper voltage
limit, this produces a maximum absolute value of 30.2 V and, as a mini-
mum voltage limit, the minimum absolute value of 18.5 V.
U
1.05 * 28.8 V = 30.2 V
Upper limit 28.8 V
0.866 * 30.2 V = 26.1 V
1.05 * 21.4 V = 18.5 V
20.4 V
Lower limit
0.866 * 21.4 V = 18.5 V
0
Electric Drives Bosch Rexroth AG
and Controls
L1 L2 L3
PE
+24V
0
30 el
0
cos (30 ) = 0.866
4−7
t