41
Additional EMI characterisation
CoolX is compliant with SEMI F47 for voltage dips and interruptions. Input voltage must be
>180VAC.
Guidelines for Optimal EMC Performance
All Excelsys products are designed to comply with European Normative limits (EN) for
conducted and radiated emissions and immunity when correctly installed in a system. See
performance levels attained above. However, power supply compliance with these limits is
not a guarantee of system compliance. System EMC performance can be impacted by a
number and combination items. Design consideration such as PCB layout and tracking, cabling
arrangements and orientation of the power supply amongst others all directly contribute to
the EMC performance of a system.
Cabling arrangements and PCB tracking layouts are the greatest contributing factors to
system EMC performance. It is important that PCB tracks and power cables are arranged to
minimise current carrying loops that can radiate, and to minimise loops that could have noise
currents induced into them. All cables and PCB tracks should be treated as radiation sources
and antenna and every effort should be made to minimise their interaction
•
Keep all cable lengths as short as possible
•
Minimise the area of power carrying loops to minimise radiation, by using
twisted pairs of power cables with the maximum twist possible.
•
Run PCB power tracks back to back.
•
Minimise noise current induced in signal carrying lines, by twisted pairs for sense
cables with the maximum twist possible.
•
Do not combine power and sense cables in the same harness.
•
Ensure good system grounding. System Earth should be a “starpoint”. Input earth
of the equipment should be directed to the “starpoint” as soon as possible. The
power supply earth should be connected direc
tly to the “starpoint”. All other
earths should go to the ‘starpoint”.
Summary of Contents for CoolX1800
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