Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 436

15. MR-J3W-0303BN6 SERVO AMPLIFIER
15.3.8 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).
Main circuit power
supply: 48VDC
24VDC
(Note 1)
48VDC
(Note 1)
Main circuit power
supply: 24VDC
24VDC
(Note 1)
Note 1. For power supply specifications, refer to section 15.1.2.
2.
to the grounding terminal of the cabinet.
Ground the servo amplifier and the servo motor securely.
To prevent electric shock, be sure to connect the noiseless grounding (
of the servo amplifier to the grounding terminal of the cabinet.
Circuit
protector
Circuit
protector
of the servo motor must be connected to
Control box
Servo amplifier
CNP1
24
0
PM
CNP2A
RA
CNP2B
CNP1
Grounding terminal
of the CNP2A/CNP2B connector. Do not connect the wire directly
15 - 31
CN2A
U
V
W
(Note 2)
CN2B
U
V
W
(Note 2)
Outer
box
) terminal
A-axis servo motor
Encoder
U
V M
W
B-axis servo motor
Encoder
U
V M
W