Grounding - Mitsubishi Electric MR-J4W2-0303B6 Instruction Manual

18. MR-J4W2-0303B6 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 of servo motor to E1 and E2 of the CNP1 connector. Do not connect the wire directly to the grounding 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
protector
Grounding terminal
Servo amplifier
CNP1
24
0
PM
CNP1
RA
U1
V1
W1
E1
CN3
CNP1
U2
V2
W2
CNP1
E2
18 - 39
A-axis servo motor
CN2A
W
(Note 2)
B-axis servo motor
CN2B
W
(Note 2)
Outer
box
Encoder
U
M
V
Encoder
U
M
V