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Installation Inside The Control Cabinet - Mitsubishi Electric MELSEC A Series User Manual

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Specifications
Test Item
EN61000-4-2
Static electricity
immunity *2
EN61000-4-4
First transient
burst noise
ENV50140
Radiated
electromagnetic
EN50082-2•
field AM
1995
modulation *2
ENV50204
Radiated
electromagnetic
field Pulse
modulation *2
ENV50141
Conduction noise
(*1) QP: Quasi-peak value, Mean : Average value
(*2) The PLC is an open type device (device installed to another device) and must
be installed in a conductive control box.
The tests for the corresponding items were performed while the PLC was
installed to inside the control box.

3.1.2 Installation inside the control cabinet

Since the PLC is an open type device (device incorporated into another device), it
must be installed in the control cabinet. This has a good effect of not only for
assuring safety but also for shielding noise emitted from the PLC, by means of the
control cabinet.
(1) Control cabinet
(a) Use a conductive control cabinet.
(b) When attaching the control cabinet's top plate or base plate, mask
painting and weld so that good surface contact can be made between
the cabinet and plate.
(c) To ensure good electrical contact with the control cabinet, mask the
paint on the installation bolts of the inner plate in the control cabinet
so that contact between surfaces can be ensured over the widest
possible area.
Test Description
Immunity test by applying
static electricity to the
module enclosure.
Immunity test by applying
burst noise to the power
line and signal cable., 2kV
Immunity test by applying
aradiated electric field to
the product.
Immunity test by applying
aradiated electric field to
the product.
Immunity test by inducting
an electromagnetic field in
the power line signal
cable.
10
Standard Values
4kV contact discharge
8kV air discharge
2kV
10V/m, 80-1000MHz, 80% AM
modulation@1kHz
10 V/m, 900MHz, 80% AM
modulation@1 k Hz
10 V/ms, 0.15-80MHZ, 80% AM
modulation@1kHz

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