U
System
Controller
Power Supply
SICK
Device
8
6
5
2
1
3
4
7
=
9
=
ß
Figure 19: Example: Prevention of equipotential bonding currents in the system configuration by
the insulated mounting of the device
1
System controller
2
Device
3
Voltage supply
4
Grounding point 3
5
Insulated mounting
6
Grounding point 2
7
Ground potential difference
8
Grounding point 1
9
Metal housing
ß
Shielded electrical cable
Even in the event of large differences in the ground potential, ground loops are effec‐
tively prevented. As a result, equalizing currents can no longer flow via the cable shields
and metal housing.
NOTICE
The voltage supply for the device and the connected peripheral devices must also guar‐
antee the required level of insulation.
Under certain circumstances, a tangible potential can develop between the insulated
metal housings and the local ground potential.
6.2
Wiring instructions
NOTICE
Faults due to incorrect wiring!
Incorrect wiring may result in operational faults.
•
Follow the wiring instructions closely.
Pre-assembled cables
6
ELECTRICAL INSTALLATION
44
O P E R A T I N G I N S T R U C T I O N S | RFU63x, RFU65x
8014335/ZTL9/2018-10-14 | SICK
Subject to change without notice
