DOC-0017-03-EN: AC15 Series - Hardware Installation Manual
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DOC-0017-03-EN-B 04.04.2023
EMC Installation Guidance
Protective Earth (PE) Connections
WARNING!
Local wiring regulations take precedence and may require the protective
earth connection of the motor to be connected locally, i.e., not as specified
in these instructions. This will not cause shielding problems because of
the relatively high RF impedance of the local earth connection.
When installing an AC15 in a control cubicle, Parker recommends using a star-point earthing method where
‘noisy’ and ‘clean’ earths are separated out. Four separate earth bus bars, three of which are insulated from
the mounting panel, connect to a single earth point (star point) near the incoming safety earth from the main
supply:
CUBICLE BACK PANEL
Incoming Safety Earth (PE)
1. ‘Clean’ Earth: Digital
3. Metal Work Earth
1. ‘Clean’ Earth: Analogue
2. ‘Dirty’ Earth
4. Signal / Control Screen
Doors
Frame
Back
Panel
Cubicle
PE
PE
PE
Screened Cable
(To Motor)
Screened Cable
(To Motor)
Screened Cable
(To Motor)
STAR POINT EARTH
Screened Signal / Control
Cable
Unscreened Cable
24Vdc
Control
230Vac
Control
110Vac
Control
Key:
‘CLEAN’
Analogue Earth Cables
‘CLEAN’
Digital Earth Cables
‘DIRTY’
Earth Cables
Enclosure Earth Cables
Unscreened Signal Cables
Screened Multi-Core Cables
U-Clip Connected to Back Panel
Busbar Insulated from Back Panel
Busbar Connected to Back Panel