MES9000 series
−
Instruction manual v1.1
27
© ads-tec Industrial IT GmbH • Heinrich-Hertz-Str. 1 • 72622 Nürtingen • Germany
5.2 Earthing concept
The earthing concept essentially depends on the installation site and must be planned and implemented
by a specialist electrical engineer.
The following are provided on the device:
•
only on 24-VDC devices: An
FE
connection in the power supply connector as
EMC filter reference
potential
,
•
on 24-VDC and AC devices: A
PE
earthing lug
in the service slot.
Conductor cross sections for single-wire cable lines
:
•
PE
: Up to a maximum cable
line length of 5 m: ≥ AWG 17 (
≙
1 mm
2
). Optimal: AWG 13 (
≙
2.5
mm
2
).
The cable colour must be green-yellow and the effectiveness of the protective earthing must be
confirmed by carrying out a
protective earth conductor test according to VDE 0701/0702
.
•
FE
: AWG 18 (
≙
0.75 mm
2
). The cable colour must not be green-yellow.
ATTENTION
This connection is necessary in order to comply with
EMC
requirements.
Recommendation for use
:
When possible, FE and PE should be connected to the central earthing rail via
separate
cable lines.