IP20 distributed I/O interfaces have been developed to comply with the principal national and international standards relating to industrial electronic control devices:
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specifications specific to PLCs (operating characteristics, immunity, ruggedness, safety):
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NF C 63 850,
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IEC 1131-2,
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CSA 22.2 No. 142,
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NEMA ICS 3.304,
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UL 508.
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immunity to electrostatic discharge:
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dielectric properties and self-extinguishing insulating materials:
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strict limitation on the degree of electromagnetic interference produced:
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EN 55022,
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NF C 91 022,
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FCC Part 15,
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VDE 871-877,
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...
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merchant navy specification:
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BV,
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DNV,
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GL,
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LROS,
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RINA,
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...
