Siemens Simatic S7-300 CPU 315-2-PN/DP - Page 223

Appendix
A.2 Protection against electromagnetic interference
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
A-13
The figure below shows some options for mounting shielded cables, using cable clamps.