Electrical connection
Leuze electronic
LES 36
44
TNT
35/7-2
4
V
5.
Avoid leakage currents in the cable shield
:
Leakage currents arise from incorrectly implemented equipotential bonding. There-
fore, carefully ground all parts of the machine.
Note
: You can measure leakage currents with a clip-on ammeter.
6.
Star-shaped cable connections
:
To avoid interference between various consumers, ensure that the devices are con-
nected in a star shape. This will prevent cable loops.
General shielding information:
Avoid spurious emissions when using power components (frequency inverters, …). The
technical descriptions of the power components provide the necessary specifications
according to which the respective power component satisfies its CE conformity.
In practical work, the following measures have proven effective:
• Screw the mains filter, frequency inverter flat on the galvanized mounting plate.
• Mounting plate in the switch cabinet made of galvanized sheet steel, thickness
3mm
• Keep cable between mains filter and inverter as short as possible and twist cables.
• Shield both ends of the motor cable.
• Properly ground the total system.
Carefully ground all parts of the machine and of the switch cabinet using copper strips,
ground rails or grounding cables with large cross section.
Below, the EMC-compliant connection of the Light section sensors LES is described in prac-
tical use with images.
Connect the ground potential to the light section sensors
Figure 6.3:
Connecting the ground potential to the light section sensor
Devices produced after April 2011 are
equipped with an additional ground-
ing terminal.
All devices can also be connected
to ground potential at the M4
threaded hole on the dovetail.
Attention!
Place lock washer
underneath and
check the penetration
of the anodized coat-
ing!
