Chapter 3 Installation Guidelines
Manual VIPA HMI
3-4
HB160E - TP - RE_610-3B2J0 - Rev. 09/09
In many cases, adherence to a set of very elementary rules is sufficient 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!
•
Interconnect any inactive metal components via low-impedance
conductors with a large cross-sectional area.
•
Execute screw connections at coated and anodized metal parts either
with special contact washer or remove the isolating protective film.
•
Install a central connection between the chassis ground and the
earthing/protection system.
Ensure that cabling is routed properly during installation!
•
Divide the cabling into different cable groups
(High voltage lines, power supply lines, signal lines, data lines).
•
Always install high voltage lines and signal or data lines in separate
channels or bundles.
•
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!
•
Data lines must be screened. The screen has to be laid both-sided.
•
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.
•
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.
Clamp cables mechanically by means of cable clamps. Route the
connected screen to the modules without interruptions, but don't
connect the screen again.
•
Ensure that the ground rail has a low-impedance connection to the
cabinet/cubicle.
•
Use only metallic or metallic covers for the plugs of screened data lines.
Basic rules for
ensuring EMC
