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4.2 Connection of the power unit
4.2.1 Connection of the DC bus X1D
The copper bars connect the DC bus of the different H6 devices. Precharging, power
supply and regeneration (if required) is provided by the supply unit. The electrical con-
nection is made with metal bridges, which must be mounted (as illustrated in the photo).
A plastic cap must be installed at both ends of the H6 system as protection against
accidental contact.
DANGER
Caution, dangerous voltage
►
The voltage on the DC bus during operation can be up to 840 Vdc!
Bridges for the connection of the
DC bus between the units
upper rail = DC+
lower rail = DC–
Place plastic cap as protection against
accidental contact at the end of the
system
Torx raised-head screw M4 x 10
required tool
Torx screwdriver TX20
Tightening torque 3.0 Nm (bridge)
1.1…1.2 Nm (plastic cap)
Figure 12: Connection of the DC bus
Attach the cover for the DC bus again after the installation.
4.2.2 Connection of the 24v bus X1C
The 24V bus supplies the control and the driver circuit of the axis module and the power
supply and regenerative unit with 24V DC voltage. Generally this voltage is provided by
the COMBIVERT H6 supply unit, but it can also be used by an existing voltage source.
The bridge for the connection of the 24V bus is attached to the units
and fixed with a screw.
Cross-drive screw M3x10
Tightening torque 0.5 Nm
Figure 13: Connection of the 24V bus
ATTENTION
The assembly of the jumper must be carried out with special care. Tilting
or breaking the plug contacts is to be prevented.
42
CONNECTION OF THE POWER UNIT
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