Beckhoff EP7402-0057, Manual

Page: 16 / 63

Mounting and cabling
EP7402-0057 16 Version: 1.3
3.1.2 Fixing
NOTE
Dirt during assembly
Dirty connectors can lead to malfunctions. Protection class IP67 can only be guaranteed if all cables and
connectors are connected.
• Protect the plug connectors against dirt during the assembly.
Mount the module with two M4 screws on the fastening holes in the corners of the module. The fastening
holes have no thread.
3.1.3 Functional earth (FE)
Earth the FE core of the supply line connected to X70 [
}
18] .
The FE potential is passed through to the FE pin of X71. So if multiple devices are connected in series, only
the FE core of the first supply line needs to be earthed.
X70
FE
X71
supply line supply line supply line
EP7402-0057
X70 X71
EP7402-0057
X70 X71
EP7402-0057
Fig. 1: Functional earth connection example
You can tap the FE potential at the housings of X70 and X71: use the nuts of X70 and X71 to screw on a
sheet metal. So you can earth the machine part where the box is mounted.