6. Technical specificationsElectrical installation
Festo.P.BE-CMMS-ST-HW-EN 0903b
103
In general:
-
Connect the inner screens to the pins of the plug connector
provided for the purpose; length max. 40 mm.
-
Max. length of unscreened wires: 35 mm.
-
Connect total shield flat at the motor to the plug or motor
housing; length max. 40 mm.
6.5.5
Operation with long motor cables
For applications with long motor cables and/or if the wrong motor cables are selected
with excessive cable capacity, the filters may be subjected to thermal overload. In order to
avoid such problems, we recommend the following procedure for applications in which
long motor cables are required:
-
From a cable length of over 15 m, only cables with a capacitance between the motor
phase and screen of less than 200 pF/m, or, if possible less than 150 pF/m!
(Please contact your motor cable vendor if necessary.)
-
Use of a dU/dt filter on the motor output
-
Filter on the voltage supply connection
-
Mains filter
6.5.6
ESD protection
Caution
If non-assigned plug connectors are used, there is a danger that
damage may occur to the device or to other parts of the system as a
result of ESD (electrostatic discharge).
Protective caps are available from specialised retailers to prevent
such discharges.
