Interference Protection Of Servo Controller - KEB COMBIVERT S4 Instruction Manual

Operating Specificatons
GB
2.4 Interference
Protection of Servo
Controller
GB 6
– Use shielded motor cables. Connect shield to the Servo controller to
PE and extensively connect to motor housing.
– Earth servo controller very well: star-shaped earthing, avoid earth
loops, shortest connection to main earthing terminal.
The connections on the control terminal strip and
the encoder inputs show a safe seperation in
accordance with VDE 0100. The person who sets
up the systems or machines must ensure that the
existing or newly wired circuit meets the VDE
requirements for safe seperation.
The control and power inputs of the servo controller are
protected against interferences.
An increased operational reliability and additional
protection against malfunctions is achieved through
following measures:
– Use of mains filter when the mains voltage is affected by the connection
of large consumers (reactive-power compensation equipment, HF-
furnaces etc.)
– Protective wiring of inductive consumers (solenoid valves, relays,
electromagnets) with RC elements or similar devices to absorb the
energy released at switch-off.
– Separate laying of power lines as described in the connection directions
to avoid inductive and capacitive coupling of interference pulses.
Paired-twisted cables protect against inductive parasitic voltages,
shielding provides protection against capacitive parasitic voltages.
Optimal protection is achieved with twisted and shielded cables when
signal and power lines are layed separately.