Moeller PS 416-BGT-4 Series, Hardware And Engineering, Page: 21 / 150

Engineering
18
02/98 AWB 27-1208-GB
Ensure that all signal cables of communications and
analog cards are laid separately from power and
control cables in order to prevent interference.
Radiated interference
Interference is either caused by radiation or via
electromagentic fields or by static discharges.
Interference signals coming from electromagnetic
fields
can affect signal cables. This can be prevented
by screening these cables. The screen braid here
intercepts the interference potential. The screen
discharge to earth is implemented via high-frequency,
low-impedance connections.
The screen earth should
be located as close as possible to the most sensitive
location of the system, e. g. on the inputs of the
cards. A potential equalisation bar can therefore be
fitted on the racks of the PS 416 system (see
Appendix). The screen must not be interrupted so
that the conductive plugs and mounting components
which do not belong to the signal circuit on the card
are connected with the screen. They are earthed via
the protective conductor on the rack which is
connected with the central reference point.
Installation notes, see chapter “Racks”.
PS 416
3
230 V AC
POW-400
Ferrite ring
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