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Emc Directive And Low-voltage Instruction; Requirements For Compliance To Emc Directive (89/336/eec); Emc Standards - Mitsubishi Electric MELSEC A Series User Manual

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3. EMC DIRECTIVE AND LOW-VOLTAGE INSTRUCTION

3.1 Requirements for Compliance to EMC Directive (89/336/EEC)

The EMC Directive (89/336/EEC) will become mandatory within Europe from
January 1st 1996. The EMC directive in essence defines the amount of
electromagnetic output a product is allowed to produce and how susceptible that
product is to electromagnetic interference. Any manufacturer or importer of
electrical/electronic apparatus must before releasing or selling products within
Europe after that date have either a CE mark attached to their goods. Testing to
comply with the directive is done by use of agreed European standards which
define limits for radiated and mains conducted electromagnetic emissions from
equipment, levels of immunity to radiated emissions, ability for equipment to cope
with transient voltage surges and electro-static discharges.
When installed in the specified manner this unit will be compliant with the relevant
standards EN50081-2 and prEN50082-2 as applicable in the EMC directive. Failure
to comply with these instructions could lead to impaired EMC performance of the
equipment and as such Mitsubishi Electric Corporation can accept no liability for
such actions.

3.1.1 EMC standards

When the PLC is installed following the directions given in this manual its EMC
performance is compliant to the following standards and levels as required by the
EMC directive.
Specifications
Test Item
EN55011
Radiated noise
EN50081-2:
1995
EN55011
Conduction noise
IEC801-2
Static electricity
immunity *2
IEC801-3
prEN50082-2•
Radiated
1991
electromagnetic
field *2
IEC801-4
First transient
burst noise
Test Description
Measure the emission
released by the product.
Measure the emission
released by the product to
the power line.
Immunity test by applying
static electricity to the
module enclosure.
Immunity test by applying
aradiated electric field to
the product.
Immunity test by applying
burst noise to the power
line and signal cable.
9
Standard Values
30M-230 M Hz QP : 30dBµ V/m
(30m measurement) *1
230M-1000MHz QP : 37dBµ V/m
(30m measurement)
150k-500kHz QP•
79dB, Mean•66dB*1
500k-30MHz QP•
73dB, Mean•60dB
4kV contact discharge
8kV air discharge
10V/m, 27-500MHz
2kV

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