
B–63783EN/01
3. INSTALLATION
17
NOTE
1 The groups must be 10 cm or more apart from one another
when binding the cables in each group.
2 The electromagnetic shield refers to shielding between
groups with grounded steel plates.
The CNC machine tool has three grounding systems:
D Grounding system for signals
The grounding system for signals provides the reference potential (0
V) for the electric signal system.
D Protective grounding system
The protective grounding system is intended to ensure safety and
shield any external noise and internally–generated noise. It consists
of device frames, unit cases, panels, as well as the shields of the
interface cables connecting devices.
D Protective earth (PE) system
The protective earth (PE) system connects the protective grounding
system, which is provided for devices and units, to ground at a single
location.
Connection line for grounding
Distributed
I/O
α Tamplifier
AC power
CNC
PE (grounding plate of the cabinet)
24–V power
AC input
Machine cabinet
Display
Operator’s
panel
Connection line for the
protective earth (PE) system
Pendant box
Frame
AC power
Frame
3.6.2
Grounding