Getting Started
20NL31-00 E1
2019-02-13
Page 20
2.3.2
Connecting an Earthing Cable
The NL31 features an earthing connection.
Carry out the following steps to connect the earthing cable:
»
Use an earthing cable with a cross section of at least 4 mm
²
.
»
Align the spring washer, the washer and the earthing cable over the M6 screw.
»
Carefully place the screw with all aligned parts over the screw hole and fasten the
screw with a tightening torque of 3.5 Nm.
-
For supply voltages 24 V DC and 36 V DC nominal:
This connection is a functional ground.
-
For supply voltages 48 V DC to 110 V DC nominal:
This connection is a low impedance ground path for electrical safety.
2.3.3
Connecting the Devices
»
Connect all Ethernet devices to be served.
Connect the earthing cable before making any other connections!
A protective earth connection is essential for the system to meet its EMC
specifications.
When disassembling the system, always detach the earthing cable last.
Spring washer
Earthing cable
Screw hole
Washer
Screw
