Eaton easyE4 Manual page 41

CAUTION
SAFELY DIVERTING ELECTRICAL INTERFERENCE CURRENTS
The devices must be connected to a central earth point with a conductor
that is as short and has as low a resistance as possible.
Ground connection characteristics:
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Wire cross-sectional area ≧ 1.5 mm², length ≦ 350 mm
The easyE4 needs to be connected to the conductive structure in, e.g.,
the control panel using the central earth point (earthing screw). This
method of earthing is mandatory required for proper function.
DANGER
STRAY CURRENTS
Large equalizing currents between the functional earthing system and
the ground system of different devices may result in fire or in mal-
functions due to signal interference.
If necessary, route an equipotential bonding conductor, with a
cross-sectional area that is several times larger than that of the
cable shielding, parallel to the cable.
CAUTION
DATA LOSS
If the SD card is being written to and a voltage drop occurs or the card
is removed, data may be lost or the SD card may be ruined.
Insert the SD card only when the easyE4 is de-energized.
Avoid writing to SD cards. Reasons:
SD cards have a limited number of write cycles.
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If there is a voltage drop while a write operation is in progress, data
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loss is highly likely to occur.
Remove the SD card only when the easyE4 is de-energized.
Before switching off the device, make sure that there are no pro-
grams writing to the SD card.
CAUTION
SHORT-CIRCUIT HAZARD
If the device is or has been exposed to environmental fluctuations (ambi-
ent temperature, air humidity), condensation may form on or inside it. As
long as this condensation is present, there will be a short-circuit hazard.
Do not switch on the device when it has condensation in or on it.
If the device has condensation in or on it, or if the panel has been
easyE4 10/19 MN050009 EN www.eaton.com
1. easyE4 control relays description
1.9 Safety regulations
37