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3.2 Requirements for Compliance with Low Voltage Directives
The Low Voltage Directives apply to the electrical equipment operating
from 50 to 1000VAC or 75 to 1500VDC; the manufacturer must ensure
the adequate safety of the equipment.
Guidelines for installation and wiring of MELSEC-AnS series
programmable controller are provided in Section 3.2.1 to 3.2.7 for the
purpose of compliance with the EMC Directives.
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 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.
3.2.1 Standard applied for MELSEC-AnS series programmable
controller
The standard applied for MELSEC-AnS series programmable controller
series is EN61010-1 safety of devices used in measurement rooms,
control rooms, or laboratories.
For the modules which operate with the rated voltage of 50 VAC/75
VDC or above, we have developed new models that conform to the
above standard.
For the modules which operate with the rated voltage under 50 VAC/75
VDC, the conventional models can be used, because they are out of the
low voltage directive application range.
3.2.2 Precautions when using the MELSEC-AnS series
programmable controller
Module selection
(1) Power module
For a power module with rated input voltage of 100/200 VAC, select
a model in which the internal part between the first order and
second order is intensively insulated, because it generates
hazardous voltage (voltage of 42.4 V or more at the peak) area.
For a power module with 24 VDC rated input, a conventional model can
be used.
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