Operating instructions

6-56 Mounting and Installation Rexroth IndraDrive
DOK-INDRV*-FU*********-IB01-EN-P
DC Bus (L+, L-)
By means of the DC bus connection, the following components are linked:
• several drive controllers to one another, and
• drive controllers to additional components in order to
• increase the stored power by means of DC bus capacitor unit
• increase the permissible braking resistor continuous output by
means of DC bus resistor unit
The DC bus is connected via contact bars and screws (M6) at the front of
the drive controller. Depending on the width of the drive controllers, there
are contact bars of different lengths.
6 Nm
If in special cases it is not possible to use the DC bus rails for connection,
connection must be established using the shortest possible twisted wires.
Length of twisted wire HCS02: max. 2 m
HCS03: max. 4 m
Wire cross section min. 10 mm²,
but not less than supply feeder
cross section
Wire protection by means of fuses in the mains
supply
Dielectric strength of single strand against
ground
> 750 V
(e.g.: strand type - H07)
CAUTION
Damage caused by voltage arcing!
If drive controllers are stacked in the control cabinet,
the connections for the DC buses between the drive
controllers have to be correctly made.
The figures below illustrate the correct DC bus connection for stacked
drive controllers. The illustrated way of connection keeps bare wire
sections from being situated directly vis-à-vis. This avoids voltage arcing.
The cables have to be twisted.
CAUTION
Risk of damage!
Connect the devices both to the left and to the right
screw connection at the terminal block.
Design
Tightening Torque
DC Bus Wiring