Mitsubishi Electric MR-J3-B-RJ006 Instruction Manual page 5

Take safety measures, e.g. provide covers, to prevent accidental access to the rotating parts of the servo
motor during operation.
Never hit the servo motor or shaft, especially when coupling the servo motor to the machine. The encoder
may become faulty.
Do not subject the servo motor shaft to more than the permissible load. Otherwise, the shaft may break.
When the equipment has been stored for an extended period of time, consult Mitsubishi.
(2) Wiring
Wire the equipment correctly and securely. Otherwise, the servo motor may operate unexpectedly.
Do not install a power capacitor, surge absorber or radio noise filter (FR-BIF option) between the servo
motor and servo amplifier.
Connect the wires to the correct phase terminals (U, V, W) of the servo amplifier and servo motor.
Not doing so may cause unexpected operation.
Connect the servo motor power terminal (U, V, W) to the servo motor power input terminal (U, V, W)
directly. Do not let a magnetic contactor, etc. intervene.
Servo amplifier
Do not connect AC power directly to the servo motor. Otherwise, a fault may occur.
The surge absorbing diode installed on the DC output signal relay of the servo amplifier must be wired in
the specified direction. Otherwise, the forced stop (EM1) and other protective circuits may not operate.
When the cable is not tightened enough to the terminal block (connector), the cable or terminal block
(connector) may generate heat because of the poor contact. Be sure to tighten the cable with specified
torque.
(3) Test run adjustment
Before operation, check the parameter settings. Improper settings may cause some machines to perform
unexpected operation.
The parameter settings must not be changed excessively. Operation will be insatiable.
Servo motor
U
U
V
V
W
W
Servo amplifier
24VDC
DOCOM
DICOM
Control
output
RA
signal
CAUTION
CAUTION
Servo amplifier
U
V
M
W
Servo amplifier
DOCOM
DICOM
Control
output
signal
CAUTION
A - 4
Servo motor
U
V
M
W
24VDC
RA