Mitsubishi Electric MELSERVO-JN Series - 3.12 Grounding

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3. SIGNALS AND WIRING
3.12 Grounding
WARNING
Ground the servo amplifier and servo motor securely.
To prevent an electric shock, always connect the protective earth (PE) terminal
(terminal marked
) of the servo amplifier with the protective earth (PE) of the
control box.
The servo amplifier switches the power transistor on-off to supply power to the servo motor. Depending on the
wiring and ground cable routing, the servo amplifier may be affected by the switching noise (due to di/dt and
dv/dt) of the transistor. To prevent such a fault, refer to the following diagram and always ground.
To conform to the EMC Directive, refer to the EMC Installation Guidelines (IB(NA)67310).
Servo amplifier
L
1
L2
Line filter
CN2
Outer
box
Encoder
M
U
V
W
Protective earth (PE)
Programmable
logiccontroller
(Note)
Main circuit
power supply
CN1
W
V
U
Ensure to connect it to PE
terminal of the servo amplifier.
Do not connect it directly to
the protective earth of
the control panel.
Control bo
x
Servo motor
MC
MCCB
+24V
0V
(Note)
Control
circuit
power
supply
Circuit
protector
Note. For the specification of power supply, refer to section 1.3.