3-10 Installation
EMC Considerations
Trio Motion Technology
Suppliers of equipment that falls within the scope of this directive must show
“due diligence” in ensuring compliance. Trio has achieved this by having prod-
ucts that it considers to be within the scope of the directive tested at an inde-
pendent test house.
As products comply with the general protection requirements of the directive
they can be marked with the CE mark to show compliance with this and any
other relevant directives. At the time of writing this manual the only applica-
ble directive is the EMC directive. The low voltage directive (LVD) which took
effect from 1st January 1997 does not apply to current Trio products as they
are all powered from 24V which is below the voltage range that the LVD
applies to.
Just because a system is made up of CE marked products does not necessarily
mean that the completed system is compliant. The components in the system
must be connected together as specified by the manufacturer and even then it
is possible for some interaction between different components to cause prob-
lems but obviously it is a step in the right direction if all components are CE
marked.
Testing Standards
For the purposes of testing a typical system configuration had to be chosen
because of the modular nature of the Motion Coordinator products. Full
details of this and copies of test certificates can be supplied by Trio if
required. For each typical system configuration testing was carried out to the
following standards:
Emissions - BS EN55022:1995 or BS EN50081-1:1992
(depending on the particular product.)
Note that both standards specify the same limits for radiated emissions which
is the only applicable part of the standards to Trio products. Most products
conform to the Class A limits but some products, such as the range of mem-
brane keypads, are within Class B limits.
Immunity - BS EN50082-2:1995.
This standard sets limits for immunity in an industrial environment and is a far
more rigorous test than part 1 of the standard.
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