4
Installation
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Festo – GDCP-CMMO-ST-EA-SY-EN – 2017-05c – English
4
Electrical installation
Caution
Unexpected and unintended movement of the drive during mounting, installation and
maintenance work
Before starting work: Switch off power supplies. Cancelling the enable signal on the
controller is not sufficient.
Secure the power supplies against accidental reactivation.
4.1
EMC-compliant wiring
Note
Interference caused by electromagnetic factors
To ensure electromagnetic compatibility in accordance with the EMC directives:
Connect the metal sub-base of the CMMO-ST to the earth potential with low imped
ance (short cable with large cross section).
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Recommendation for the routing of cables:
– Do not run signal cables parallel to power cables.
– Minimum distance of signal cables to power cables is 25 m.
– Avoided crossing power cables or running them at a 90° angle.
– Note permitted cable lengths (max. length 30 m)
– On shielded lines with unshielded connector housings. Make the length of the unshiel
ded cores at the end of the cable as short as possible.
4.2
Functional earth FE
The lower base plate of the motor controller acts as a functional earth (
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8
). The connection
is designed as a flat connector. The base plate is galvanically isolated from the power supply.
Connection to earth potential
– Shortest possible earth conductor
– braided cable, alternatively: cable with min. cross section of 2.5 4 mm²
Depending on the installation situation, a different cable may be required.
Functional earth connection
Size
Counterplug
FE
Flat pin
mm
6.3 x 0.8
Flat connector sleeve
Tab. 4.1
Functional earth connection