REXROTH Fv Series, Instruction Manual

Page: 156 / 222

This documentation specifies the EMC properties which can be achieved, in
a machine or installation, with a drive system consisting of the standard com‐
ponents.
It is also specifies the conditions under which the indicated EMC properties
can be achieved.
9.4.3 EMC measures for design and installation
Rules for Design of Installations with Drive Controllers in Compliance with EMC
The following rules are the basics for designing and installing drives in com‐
pliance with EMC:
Mains Filter Correctly use a mains filter recommended by Rexroth for radio interference
suppression in the supply feeder of the drive system.
Control Cabinet Grounding Connect all metal parts of the cabinet with one another over the largest possi‐
ble surface area to establish a good electrical connection. This, too applies to
the mounting of the mains filter. If required, use serrated washers which cut
through the paint surface. Connect the cabinet door to the control cabinet us‐
ing the shortest possible grounding straps.
Line Routing Avoid coupling routs between lines with high potential of noise and noise-free
lines; therefore, signal, mains and motor lines and power cables have to be
routed separately from another. Minimum distance: 10 cm. Provide separat‐
ing sheets between power and signal lines. Ground separating sheets sever‐
al times.
The lines with high potential of noise include:
●
Lines at the mains connection (incl. synchronization connection)
● Lines at the motor connection
● Lines at the DC bus connection
Generally, interference injections are reduced by routing cables close to
grounded sheet steel plates. For this reason, cables and wires should not be
routed freely in the cabinet, but close to the cabinet housing or mounting pan‐
els. Separate the incoming and outgoing cables of the radio interference sup‐
pression filter.
Interference Suppression Ele‐
ments
Provide the following components in the control cabinet with interference sup‐
pression combinations:
●
Contractors
● Relays
● Solenoid values
● Electromechanical operating hours counters
Connect these combinations directly at each coil.
Twisted Wires Twist unshielded wires belonging to the same circuit (feeder and return ca‐
ble) or keep the surface between feeder and return cable as small as possi‐
ble. Wires that are not used have to be grounded at both ends.
Lines of Measuring Systems Lines of measuring systems must be shielded. Connect the shield to ground
at both ends and over the largest possible surface area. The shield may not
be interrupted, e.g. using intermediate terminals.
Digital Signal Lines Ground the shields of digital signal lines at both ends (transformer and re‐
ceiver) over the largest possible surface area and with low 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
possible and twist them.
Bosch Rexroth AG DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv
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Technical Data