6
Electrical installation
Installation instructions for fieldbus interfaces, field distributors
Manual – EtherCAT
®
Interfaces, Field Distributors
35
•
Connect the shield to the housing of both units using EMC cable glands. Also ob-
serve the further notes regarding the selection of the cable glands.
•
Generally provide the GND reference potential.
•
Twist the conductors as shown in the following figure.
RS+
RS-
GND
6.2
Installation instructions for fieldbus interfaces, field distributors
6.2.1
Connecting supply system leads
•
The nominal voltage and frequency of the MOVIMOT
®
inverter must correspond to
the data for the power supply system.
•
Dimension the cable cross section according to the input current I
line
for rated
power (see MOVIMOT
®
operating instructions, "Technical data" chapter).
•
Install fuses at the beginning of the power supply cables behind the supply bus
junction.
The following fuses are permitted:
– Fuses in utilization category gG
– Power circuit breakers with characteristic B or C
– Motor circuit breaker
Size the fuses according to the cable cross section.
•
SEW‑EURODRIVE recommends using earth-leakage monitors with pulse-code
measurement in voltage supply systems with a non-grounded star point (IT sys-
tems). Using such devices prevents the earth-leakage monitor mis-tripping due to
the ground capacitance of the inverter.
25809148/EN – 01/2019