Grounding - Mitsubishi Electric MR-J4-10A(-RJ) Instruction Manual

18. MR-J4-03A6(-RJ) SERVO AMPLIFIER

18.3.10 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 "EMC Installation Guidelines".
48 V DC main circuit power supply
24 V DC
(Note 1)
48 V DC
(Note 1)
24 V DC main circuit power supply
24 V DC
(Note 1)
Note 1. For power supply specifications, refer to section 18.1.3.
2. Connect
terminal of the cabinet.
Ground the servo amplifier and servo motor securely.
To prevent an electric shock, always connect the noiseless grounding terminal
(marked ) of the servo amplifier to the grounding terminal of the cabinet.
Cabinet
Circuit
protector
Circuit
Programmable
protector
controller
Protective earth (PE)
of servo motor to E of the CNP1 connector. Do not connect the wire directly to the grounding
Servo amplifier
CNP1
24
0
PM
CNP1
RA
U
V
W
E
CN1
CNP1
18 - 42
Servo motor
CN2
(Note 2)
Outer
box
Encoder
U
V M
W