9 - 1
9. EMC AND LOW VOLTAGE DIRECTIVES
9 EMC AND LOW VOLTAGE DIRECTIVES
The product sold in the European countries have been required by law to comply with the
EMC and Low Voltage Directives of the EU Directives since 1996 and 1997, respectively.
The manufacturers must confirm by self-declaration that their products meet the
requirements of these directives, and put the CE mark on the products.
9.1 Requirements for Compliance with EMC Directives
The EMC Directives specifies emission and immunity criteria and requires the products to
meet both of them, i.e., not to emit excessive electromagnetic interference (emission): to
be immune to electromagnetic interference outside (immunity). Guidelines for complying
the machinery including MELSEC-AnS series programmable controller with the EMC
Directives are provided in Section 9.1.1 to Section 9.1.7 below.
The guidelines are created based on the requirements of the regulations and relevant
standards, however, they do not guarantee that the machinery constructed according to
them will not comply with the Directives. Therefore, the manufacturer of the machinery
must finally determine how to make it comply with the EMC Directives: if it is actually
compliant with the EMC Directives.
9.1.1 EMC standards
Standards related to EMC directive are described below.
*1 QP: Quasi-peak value, Mean : Average value
*2 The programmable controller is an open type device (device installed to another device) and
must be installed in a conductive control panel. The tests for the corresponding items were
performed while the programmable controller was installed inside the control panel.
Specifications Test Item Test Description Standard Values
EN61000-6-4
(2001)
EN55011
*2
Radiated noise
Measure the emission released by
the product.
30 M-230 M Hz QP :
30 dB V/m (30 m measurement)
*1
230 M-1000 M Hz QP :
30 dB V/m (30 m measurement)
*1
EN55011
*2
Conduction noise
Measure the emission released by
the product to the power line.
150k-500kHz QP:
79dB, Mean : 66 dB
*1
500 K-30MHz QP :
73dB, Mean: 60 dB
*1
EN61131-2/A12
(2000)
EN61000-4-2
*2
Static electricity immunity
Immunity test by applying static
electricity to the device enclosure.
4kV contact discharge
8kV air discharge
EN61000-4-4
*2
First transient burst noise
Immunity test by applying burst
noise to the power line and signal
line.
2kV Power line
1kV Signal line
EN61000-4-12
*2
Damped oscillatory wave
Immunity test in which a damped
oscillatory wave is superimposed on
the power line.
1kV
EN61000-4-3
*2
Radiated electromagnetic field
Immunity test by applying aradiated
electric field to the product.
10V/m, 26-1000MHz
EN61000-6-2
(2001)
EN61000-4-6
*2
Conduction noise
Immunity test by inducting an
electromagnetic field in the power
line and signal line.
10V, 0.15-80MHz
To Next Page
Loading...
Need help?
General
