Mitsubishi A2USCPU(S1), User Manual

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9 - 9
EMC AND LOW VOLTAGE DIRECTIVES 9.
9.1.4 Power supply module
The precautions required for each power supply module are described below. Always
observe the items noted as precautions.
*1 If sufficient filter circuitry is built into the 24VDC external power supply module, the noise
generated by A1S63P will be absorbed by that filter circuit, so a line filter may not be required.
Filtering circuitry of version F or later of A1S63P is improved so that a external line filter is not
required.
*2 To ensure the compliance with CE (EN6111-21/A11), make sure to short-circuit the LG and
FG terminals using a wire of 6 to 7cm (2.36 to 2.76inch).
9.1.5 Ferrite core
Use of ferrite cores is effective in reducing the conduction noise in the band of about
10MHz and radiated noise in 30 to 100MHz band.
It is recommended to attach ferrite cores when the shield of the shielded cable coming out
of control panel does not work effectively, or when emission of the conduction noise from
the power supply line has to be suppressed.
*1
The ferrite cores used in our tests are TDK's
ZCAT3035.
It should be noted that the ferrite cores should be fitted to the cables in the position
immediately before they are pulled out of the enclosure. If the fitting position is improper,
the ferrite will not produce any effect.
*1 To response with CE(EN61131-2/A12), make sure to mount 2 or more ferrite cores onto the
power supply line.
The mounting position should be as near the power supply module as possible.
Use the following ferrite core.
Ferrite core
Model Precautions
A1S61PN, A1S62PN
Make sure to short-circuit and ground the LG and FG terminals.
*2
A1S63P
*1
Use the 24VDC panel power supply equipment conforming to the EU
Directive.
Type : ZCAT2235-1030A (TDK ferrite core)
Contact: TDK Corporation