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Power Supply - Mitsubishi Electric MELSEC A Series User Manual

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(3) CPU module, memory cassette, base unit
Conventional models can be used for these modules, because they only
have a 5VDC circuit inside.
(4) Special module
Conventional models can be used for the special modules including
analog module, network module, and positioning module, because the
rated voltage is 24VDC or less.
(5) Display device
Use an A900 series GOT CE compatible model.

3.2.3 Power supply

The insulation specification of the power module was designed assuming
installation category II. Be sure to use the installation category II power supply to the
PC.
The installation category indicates the durability level against surge voltage
generated by lighening strike. Category I has the lowest durability; category IV has
the highest durability.
Category II indicates a power supply whose voltage has been reduced by two or
more levels of isolating transformers from the public power distribution.
Category IV
Category III
Figure 1. : Installation Category
Category II
19
Category I

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