Wiring the S7-400
4-28 AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
4.17 Fitting the Strain Relief

Cable Ties as Strain Relief

When you have wired the front connector,the cable tie provided should be fitted at
the bottom of the front connector as a strain relief for the connected cable.
There are three ways of fitting the strain relief, according to the thickness of the
cable. Three openings are provided at the bottom of the front connector.
Figure 4-17 Fitting a Strain Relief (Viewedfrom Below)