
8.CAUTIONS FOR SAFETY STANDARDS RELATED TO AMPLIFIER INSTALLATION FANUC AC SERVO AMPLIFIER β series B-65232EN/03
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8.4 PROTECTIVE GROUNDING
The β series servo amplifiers have more than one protective
grounding terminal (marked according to 417-IEC-5019). These
terminals are used to prevent shock hazards should a dielectric
breakdown occur, and to prevent a malfunction due to noise.
All protective grounding terminals shall be connected to the
protective grounding connection terminal (PE) in the power magnetics
cabinet.
The protective grounding connections you installed should be
checked according to the indicated connection instruction (shown in
Section 8.7). Moreover, it is necessary to make sure that the cross
section of the protective grounding wires is larger than that of the
power wire.
Do not attach more than one wire to a single protective grounding
terminal. So prepare protective grounding terminals for the number of
protective grounding wires to be attached.