Digital Signal Lines
Ground the shields of digital signal lines at both ends (transmitter and receiver)
over the largest possible surface area and with low impedance. This avoids low
frequency interference current (in the mains frequency range) on the shield.
Analog Signal Lines
Ground the shields of analog signal lines at one end (transmitter or receiver)
over the largest possible surface area and with lower impedance. This avoids
low frequency interference current (in the mains frequency range) on the shield.
Connection of Mains Choke
Keep connection lines of the mains choke at the drive controller as short as pos-
sible and twist them.
Installation of Motor Power Cable
● Use shielded motor power cable or run motor power cables in a shielded
duct;
● Use the shortest possible motor power cable;
● Ground shield of motor power cable at both ends over the largest possible
surface area to establish a good electrical connection;
● It is recommended to run motor lines in shielded form inside the control cabi-
net;
● Do not use any steel-shielded lines;
● The shield of the motor power cable must not be interrupted by mounted
components, such as output chokes, sine filter or motor filters.
11.3.2 EMC-optimal Installation in Facility and Control Cabinet
General Information
For EMC-optimal installation, a special separation of the interference-free area
(mains connection) and the interference-susceptible area (drive components) is
recommended, as shown in the figures below.
●
For EMC-optimal installation in the control cabinet, use a sepa-
rate control cabinet panel for the drive components.
● Frequency converters need to be mounted in metal cabinet and
connected to power supply with grounding.
● For frequency converters with internal filter, 15 m shielded cable
was used between the motor and frequency converter in the EMC
test; for frequency converters with external filter, 5 m shielded
cable was used between the motor and the frequency converter
in the EMC test.
● For the end application system with frequency converters, the
conformity of EMC directions needs to be confirmed.
EFC 3600 Bosch Rexroth AG
Electromagnetic Compatibility (EMC)
DOK-RCON03-EFC-3600***-IT03-EN-P
151/259
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