Grounding - Mitsubishi Electric MR-J2S-CP Instruction Manual

3. SIGNALS AND WIRING

3.10 Grounding

WARNING
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).
NFB
(Note)
Power supply
Note. For 1-phase 230VAC, connect the power supply to L
There is no L for 1-phase 100 to 120VAC power supply. Refer to section 1.2 for the power supply specification.
3
Ground the servo amplifier and servo motor securely.
To prevent an electric shock, always connect the protective earth (PE) terminal of
the servo amplifier with the protective earth (PE) of the control box.
Control box
Protective earth(PE)
1
MC
Servo amplifier
CN2
L
1
L
2
L
3
L
11
U
L
21
V
W
CN1A CN1B
Outer
box
L and leave L open.
2 3
3 - 37
Servo motor
Encoder
U
V M
W
Ensure to connect it to PE
terminal of the servo amplifier.
Do not connect it directly to
the protective earth of
the control panel.