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5.2 Requirements for Conpliance with the Low
Voltage Directive
The Low Voltage Directive requires each device which operates with power supply ranging from 50VAC to
1000V and 75VDC to 1500V to satisfy necessary safety items.
In the Sections from 5.2.1 to 5.2.5, cautions on installation and wiring of the GOT to conform to the Low
Voltage Directive requires are described.
We have put the maximum effort to develop this material based on the requirements and standards of the
Directive that we have collected.
However, compatibility of the devices which are fabricated according to the contents of this manual to the
above Directive is not guaranteed. Each manufacturer who fabricates such device should make the final
judgement about the application method of the Low Voltage Directive and the product compatibility.
5.2.1
Standard subject to GOT
Standard applied to GOT: EN61131-2 Programmable controllers - Equipment requirements and tests
5.2.2
Power supply
The insulation specification of the GOT was designed assuming installation category II. Be sure to use the
installation category II power supply to the GOT.
The installation category indicates the durability level against surge voltage generated by lightning strike.
Category I has the lowest durability; category IV has the highest durability.
Installation Category
Category II indicates a power supply whose voltage has been reduced by two or more levels of isolating
transformers from the public power distribution.
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5.2 Requirements for Conpliance with the Low Voltage Directive
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5.2.1 Standard subject to GOT
EN60950-1 Safety of Information Technology Equipment
Category IV
Category III
Category II
Category I
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