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Presentation
Protective treatment of Modicon Premium PLCs
Modicon Premium/Atrium PLCs comply with “
TC
”
treatment requirements (
T
reatment
for all
C
limates).
For installations in industrial production workshops or environments corresponding
to “
TH
” (
T
reatment for hot and
H
umid environments), PLCs must be housed in
enclosures providing at least IP 54 protection as specified by standard IEC/EN 60529
or an equivalent level of protection according to NEMA 250.
These PLCs themselves have an IP 20 protection index
(1)
.
They can therefore be
installed without an enclosure in reserved access areas that do not exceed
pollution
level 2
(
control room with no dust-producing machinery or activity).
Pollution level 2
does not take account of more severe environments, such as those where the air is
polluted with dust, fumes, corrosive or radioactive particles, vapours or salts, moulds,
insects, etc.
Treatment for more severe environments
If the Modicon Premium automation platform needs to be used in a harsh environment,
the
Conformal Coating
offer provides processor and power supply modules, I/O
modules on Bus X and racks with a protective coating applied to their electronic cards.
This treatment improves the cards' insulation qualities and their resistance to:
b
Condensation
b
Dusty atmospheres (conducting foreign particles)
b
Chemical corrosion, in particular when used in sulphurous atmospheres (oil refinery,
purification plant, etc.) or atmospheres containing halogens (chlorine, etc.)
This protection, combined with appropriate installation and maintenance, enables
Modicon Premium products to be used in harsh chemical environments such as
types
3
C2
and
3
C3
described in standard IEC/EN 60721-3-3.
The functional and electrical characteristics of the coated modules are identical to
those of the non-coated versions. Please consult the characteristics pages in this
catalogue (chapter 1…chapter 5).
To order modules and racks with Conformal Coating protection, please refer to the
references pages 9/3…9/5 (for coated products add the letter “
C
”
at the end of the
standard reference.
(1)
Any slot in
TSX RKY
pp
racks that is not occupied by a module must be fitted with a
TSX RKA 02
screw-on protective cover (sold in lots of 5).
Modicon Premium automation
platform
0
Treatment for harsh environments
Conformal Coating modules
Presentation
References:
pages 9/3 …
2
1
3
4
5
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7
8
9
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