Requirement For The Compliance With Emc Directives Emc - Mitsubishi EMU4-BM1-MB User Manual

10.

Requirement for the compliance with EMC Directives EMC

EMC Directives prescribe both "Emission (electromagnetic interference): Do not radiate strong electromagnetic waves outside"
and "Immunity (electromagnetic susceptibility): Do not be influenced by electromagnetic waves from outside".
This section compiles the precautions for the compliance of the system incorporating the energy measuring unit (target model:
EMU4-BM1-MB and EMU4-HM1-MB) with the EMC Directives. The following description is based on the requirement of the
regulations and the standards we understand, but we do not guarantee to comply with the directives above for the whole system
built in accordance with this description. The manufacturer of the system finally needs to evaluate the way of the compliance with
EMC Directives and whether the system complies with them or not.
(1) Harmonized standard for EMC Directives: EN61326-1:2013
(a) Compatibility condition for harmonized standard
The energy measuring unit is the open type device (i.e. the device incorporated in other device), and needs to be
installed in the conductive control panel. The unit is tested with installed in the control panel for the emission and the
immunity out of the test items for the standard.
(2) Recommended condition for installation in the control panel
(a) Control panel
Control panel needs to have conducting property.

When bolting the top panel, bottom panel etc. of the control panel, mask the grounding part of the

panel so as not to be painted.
In inner panel, keep the conductivity in as large area as possible by masking the bolting part to the

main panel to keep the electric contact to main panel.
Ground the main panel by the thick wire so as to keep high impedance even for high-frequency wave.

(b) Installation of power line and ground line
Set up the ground point to the control panel near the energy measuring unit, and ground the frame

GND terminal of the unit to the ground terminal of the control panel (PE) by as thick and short wires as
possible. (wire length is 30cm or shorter)
(3) Cable
(a)Auxiliary power, Input voltage, CC-Link cable, MODBUS cable, Small display unit cable
When it is necessary to comply with the EMC Directive (EN-61326-1), attach ferrite cores to each cable. Ferrite cores
used in our testing is below.
Auxiliary power

KITAGAWA INDUSTRIES CO.,LTD.、RFC-H13
KITAGAWA INDUSTRIES CO.,LTD.、TRM-31-20-15E-WE
Input voltage

KITAGAWA INDUSTRIES CO., LTD.、RFC-H13
CC-Link cable, MODBUS cable

KITAGAWA INDUSTRIES CO., LTD.、RFC-20
Small display unit cable

KITAGAWA INDUSTRIES CO.,LTD.、RFC-H13
(b)External input signal line, External output signal line
Wiring of each connection wire should satisfy the following conditions.
For wiring inside buildings, the wiring length should not exceed 30 m.

Do not route wiring from the inside of the building to the outside of the building.

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