B--63005EN/02
4. MATTERS COMMON TO BOTH LCD--MOUNTED TYPE
AND STAND--ALONE TYPE i SERIES (HARDWARE)
385
CNC
Display LCD--mounted type i series CNC
Distributed
I/O
∼ amplifier
AC power
supply
24 V power
supply
AC input
PE (Cabinet earth plate)
Pendant box
Frame
Frame
Operator’ s
panel
Machine cabinet
Display stand--alone type i series CNC
Display unit
Machine cabinet
Connection line for grounding
Connection line for protective earth (PE)
CNC
Distributed
I/O
∼ amplifier
AC power
supply
AC power
supply
24 V power
supply
AC input
PE (Cabinet earth plate)
Frame
Frame
Operator’ s
panel
Pendant box
D The grounding resistance of the protective earth (PE) must be 100
ohms or less (class--D grounding).
D The connection cable for the protective earth (PE) needs to have a
cross--sectional area sufficient for flowing an accidental current that
flows to the protective earth (PE) when an accident such as a short
circuit occurs. (In general, a cross--sectional area equal to or greater
than that of the AC power line is required.)
D As a connection cable for the protective earth (PE), use a cable
integrated with an AC power line so that power is not fed when the
ground wire is disconnected.
Notes on g round system
wiring