Festo Compact Performance CP-FB6-E Manual page 20

1. Installation
1.3.2 Non-floating structure
Non-floating screening designs should be used prefer-
ably in the following cases:
– in small systems with low interference
– in bus environments with low-impedance,
– with locally earthed slaves in conjunction with poten-
With non-floating structures, the electromagnetic inter-
ference through the screening/shielding of the bus
cable is earthed on both sides via the screening
sleeve of a metal plug.
A star-shaped low-impedance earthing or potential
equalizing cables are required for this purpose.
INTERBUS
incoming
INTERBUS
continuing
Screening
!
sleeve
(metal plug)
Fieldbus node
"
housing
e.g. potential
#
equalization
Screening
$
sleeve
(metal plug)
Fig. 1/4: Circuit diagram of a non-floating INTERBUS connection
CP FB6-E 9809c
star-shaped earthing
tial equalizing cables.
$
!
"
#
1-9