In many cases, the adherence to some very elementary rules is suffi-
cient to ensure EMC. For this reason we wish to advise you to heed
the following rules:
During the installation of your automation units you should
ensure that any inactive metal components are grounded via a
proper large-surface earth!
n
Interconnect any inactive metal components via low-impedance
conductors with a large cross-sectional area.
n
Execute screw connections at coated and anodized metal parts
either with special contact washer or remove the isolating protec-
tive film.
n
Install a central connection between the chassis ground and the
earthing/protection system.
Ensure that cabling is routed properly during installation!
n
Divide the cabling into different cable groups (High voltage lines,
power supply lines, signal lines, data lines).
n
Always install high voltage lines and signal or data lines in sepa-
rate channels or bundles.
n
Install signal and data lines as close as possible to any metallic
ground surfaces (e.g. frames, metal rails, sheet metal).
Ensure that the screening of lines is grounded properly!
n
Data lines must be screened. The screen has to be laid both-
sided.
n
Analog lines must be screened. Where low-amplitude signals are
transferred it may be advisable to connect the screen on one side
of the cable only.
n
Attach the screening of cables to the ground rail by means of
large-surface connectors located as close as possible to the point
of entry. Fix the cables mechanically by means of cable clamps.
Route the connected screen to the modules without interruptions,
but don't connect the screen again.
n
Ensure that the ground rail has a low-impedance connection to
the cabinet/cubicle.
n
Use only metallic or metallic covers for the plugs of screened data
lines.
In critical cases you should implement special EMC measures!
n
Connect snubber networks to all inductive loads that are not con-
trolled by special EMC modules.
n
Use incandescent lamps for illumination purposes inside cabinets
or cubicles, do not use of fluorescent lamps.
Create a single reference potential and ensure that all electrical
equipment is grounded wherever possible!
Basic rules for ensuring
EMC
VIPA HMI Touch Panel
Installation Guidelines
Basic rules for the EMC-equitable assembly of installations
HB160 | TP-ECO | 62P-NHC0 | GB | 13-45
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