Wiring Check - Mitsubishi Electric MR-J4W2 Instruction Manual

4. STARTUP

4.1.2 Wiring check

(1) Power supply system wiring
Before switching on the main circuit and control circuit power supplies, check the following items.
(a) Power supply system wiring
The power supplied to the power input terminals (L1, L2, L3, L11, and L21) of the servo amplifier
should satisfy the defined specifications. (Refer to section 1.3.)
(b) Connection of servo amplifier and servo motor
1) The CNP3A, CNP3B, or CNP3C connector should be connected to each A-axis, B-axis, or C-axis
servo motor. The servo amplifier power output (U, V, and W) should match in phase with the
servo motor power input terminals (U, V, and W).
2) The power supplied to the servo amplifier should not be connected to the servo motor power
terminals (U, V, and W). To do so will fail the connected servo amplifier and servo motor.
3) The grounding terminal of the servo motor should be connected to the PE terminal of the CNP3_
connector of the servo amplifier.
4) The CN2A, CN2B, or CN2C connector should be connected using encoder cables securely to
each A-axis, B-axis, or C-axis encoder of the servo motors.
Servo amplifier A-axis servo motor
U
V
CNP3A
W
B-axis servo motor
U
V
CNP3B
W
C-axis servo motor
U
V
CNP3C
W
Servo amplifier
U
L1
L2 V
W
L3
Servo amplifier
4 - 3
U
V
M
W
U
V
M
W
U
V
M
W
Servo motor
U
V
M
W
Servo motor
M