BECKHOFF CX50x0 - Manual (Page 12)

Installation
8 CX50x0 units in potentially explosive areas
2. When the USB plugs are placed the cables must be fixed with cable straps to the bracket.
3. The tensile strength of the wire must be checked and if necessary the cable straps must be retightened. The
remains of the straps can be cut off with nippers or a side cutter.