5
2
4
1
3
3
6
8
7
Electro-
optical
signal
isolator
Electro-
optical
signal
isolator
IO Controller
(PLC)
CLV61x
Dual Port
PROFINET
Power
Supply
Figure 17: Prevention of equipotential bonding currents in the system configuration by the use of
electro-optical signal isolators
1
IO controller (PLC)
2
Metal housing
3
Electro-optical signal isolators
4
Optical fiber
5
Shielded electrical cable
6
Power supply
7
Grounding point 2
8
Grounding point 1
The use of electro-optical signal isolators between the islands isolates the ground loop.
Within the islands, a stable equipotential bonding prevents equalizing currents on the
cable shields.
Measures for small system installations
For smaller installations with only slight potential differences, insulated mounting of the
device and of peripheral devices may be a sufficient solution.
2
1
3
8
6
4
7
5
U
IO Controller
(PLC)
Power
Supply
CLV61x
Dual Port
PROFINET
PROFINET
Figure 18: Prevention of equipotential bonding currents in the system configuration by the insu‐
lated mounting of the device
1
IO controller (PLC)
2
Shielded electrical cable
3
Power supply
4
Grounding point 3
5
Insulated mounting
6
Grounding point 2
ELECTRICAL INSTALLATION
6
8017842/ZMG5/2017-06-12 | 8M_DR | SICK
O P E R A T I N G I N S T R U C T I O N S | CLV61x Dual Port (PROFINET)
29
Subject to change without notice
