Beckhoff EP9521-0020, Documentation

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Mounting and connection
EP9521-0020 14 Version: 1.2
4.1.2 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 in the centrally located fastening holes.
4.1.3 Functional earth (FE)
The fastening holes [
}
14] also serve as connections for the functional earth (FE).
Make sure that the box is earthed with low impedance via both fastening screws. You can achieve this, for
example, by mounting the box on a grounded machine bed.
FE
FE
Fig. 5: Functional earth via the fastening holes
4.1.4 Tightening torques for plug connectors
Screw M8 connectors tight with a torque wrench. (e.g. ZB8801 from Beckhoff)
Torque: 0.4 Nm.