2.3.4 Potential equalisation / potential separation
There can be potential shifts between buildings. In this case, equalising currents flow via the bus connection
shield which can damage the modules.
To prevent this, buildings must be connected using a potential equalisation conductor.
A
B
C
D
E
F
G
H
I
J
A
B
C
D
E
F
G
H
I
J
Expansion
module
BUS connection
Potential equalisation line
NOTICE! The dimensions of the equalization line must be installed by a specialist in accordance with regional
regulations.
Instead of the potential equalisation, a Fröling bus repeater can be used in the bus connection line to the next
building. The potential separation (galvanic isolation) allows the bus network to be split into two separate sub-
networks.
A
B
C
D
E
F
G
H
I
J
A
B
C
D
E
F
G
H
I
J
Bus repeater
Bus side A
Bus side B
Expansion
module
2
Power connection and wiring
BUS connection
36
Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com
