Festo Compact Performance CP-FB6-E, Руководство пользователя

Страница: 19 / 77

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.
1
INTERBUS
incoming
2
INTERBUS
continuing
3
Screening
sleeve
(metal plug)
4
Fieldbus node
housing
5
Earthing via
pin 4
6
No screening
sleeve,
connect
screening to
pin 6
7
RC network
Fig. 1/3: Circuit diagram of floating INTERBUS connection
5
3
2 1
6
4
7
1. Installation
1-8
CP FB6-E 9809c