General recommendations:
● Avoid any tensile or torsional stressing for the cables. Do never pull on the
cable, when loosening the connectors.
● Do not lay the cables over sharp edges.
● Always observe the minimum bending radius! The same applies for stor‐
age on drums or in rings.
● Avoid high temperature fluctuations during storage. For storage outside,
use covers.
● Cables have always to be unrolled. Do never unroll "over head".
● Do never use damaged cables.
Cables in Drag chains
To mount the cables in drag chains in the right way, some basic rules have to
be taken into account. Inserting the cables into the drag chains is to be done
with utmost care.
● Do only use cables, which are suited for the use in drag chains.
● The minimum bending radius of the drag chain is determined through the
cable with the biggest outer diameter.
● Lay out or hang out the cables before mounting so that the twisting dis‐
appears. An axial twisting of the cables must be avoided in any case.
● Lay the cables into the drag chains tension-free and twisting-free.
● Lay only laid out or hanged out cables into the drag chains and then mount
the chain into the machine.
● Ensure that the cables do not intersect or overlap each other in the chain.
● The cables have to be freely movable in the area of the bending radius as
well as in the width and height. The overall diameter of the drag chain or
rack / hole segment must only be filled with 85-90 %.
Fig.8-9: Filling degree of drag chains
● It is not allowed to fasten or to bind the cables together within the chain.
● When equipping the drag chain, it must be taken into account that the
weight must be distributed as symmetrically as possible. In other words,
install heavy cables in the outer and lightweight cables in the inner section.
Fig.8-10: Symmetrical distribution within drag chains
70/131 Bosch Rexroth AG | Electric Drives
and Controls
Rexroth MKE Synchronous Motors | Project Planning Manual
Connection Technique
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