Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 7

[Wiring]
CAUTION
● Wire the equipment correctly and securely. Otherwise, the servo motor may operate unexpectedly.
● Make sure to connect the cables and connectors by using the fixing screws and the locking
mechanism. Otherwise, the cables and connectors may be disconnected during operation.
● Do not install a power capacitor, surge killer, or radio noise filter (optional FR-BIF(-H)) on the servo
amplifier output side.
● To avoid a malfunction, connect the wires to the correct phase terminals (U/V/W) of the servo amplifier
and servo motor.
● Connect the servo amplifier power output (U/V/W) to the servo motor power input (U/V/W) directly. Do
not connect a magnetic contactor and others between them. Otherwise, it may cause a malfunction.
Servo amplifier
● The connection diagrams in this Instruction Manual are shown for sink interfaces, unless stated
otherwise.
● The surge absorbing diode installed to the DC relay for control output should be fitted in the specified
direction. Otherwise, the converter unit and the drive unit will malfunction and will not output signals,
disabling the emergency stop and other protective circuits.
● When the wires are not tightened enough to the terminal block, the wires or terminal block may
generate heat because of the poor contact. Be sure to tighten the wires with specified torque.
● Connecting a servo motor of the wrong axis to U, V, W, or CN2 of the servo amplifier may cause a
malfunction.
● Configure a circuit to turn off EM2 or EM1 when the main circuit power supply is turned off to prevent
an unexpected restart of the servo amplifier.
● To prevent malfunction, avoid bundling power lines (input/output) and signal cables together or
running them in parallel to each other. Separate the power lines from the signal cables.
[Test run and adjustment]
CAUTION
● When executing a test run, follow the notice and procedures in this instruction manual. Otherwise, it
may cause a malfunction, damage to the machine, or injury.
● Before operation, check and adjust the parameter settings. Improper settings may cause some
machines to operate unexpectedly.
● Never make a drastic adjustment or change to the parameter values as doing so will make the
operation unstable.
● Do not get close to moving parts during the servo-on status.
Servo motor
U
U
V
V
M
W
W
Servo amplifier
24 V DC
DOCOM
Control output
RA
signal
For sink output interface
Servo amplifier
U
V
W
Servo amplifier
24 V DC
DOCOM
Control output
signal
For source output interface
Servo motor
U
V
M
W
RA
5