Festo Compact Performance CP-FB6-E Manual page 19

1. Installation
1.3.1 Floating structure
Floating structures should be used preferably for parts
of a system which are situated at great distances from
each other, and where different earth potentials and in-
terference are to be expected as a result of equalizing
currents or earthing loops.
With floating structures, the electromagnetic inter-
ference through the screening/shielding of the bus
cable is conducted to earth on one side via the RC
network; on the other side, however, it is earthed via
the screening sleeve of a metal plug. Any equalizing
currents on the screening are therefore prevented by
the RC network.
INTERBUS
incoming
INTERBUS
continuing
Screening
!
sleeve
(metal plug)
Fieldbus node
"
housing
Earthing via
#
pin 4
No screening
$
sleeve,
connect
screening to
pin 6
RC network
%
Fig. 1/3: Circuit diagram of floating INTERBUS connection
1-8
$
#
!
%
"
CP FB6-E 9809c