Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 337

14. USING A DIRECT DRIVE MOTOR
14.2 Connection of servo amplifier and direct drive motor
CAUTION
(1) Connection instructions
WARNING
CAUTION
This section explains the connection of the direct drive motor power (U, V, and W). Use of the optional
connector set is recommended for connection between the servo amplifier and direct drive motor. Refer to
section 14.8 for details of the options.
For grounding, connect the grounding lead wire from the servo motor to the protective earth (PE) terminal of
the servo amplifier, and then connect the wire from the servo amplifier to the ground via the protective earth
of the cabinet. Do not connect the wire directly to the protective earth of the cabinet.
Connect the servo amplifier power output (U, V, and W) to the direct drive motor
power input (U, V, and W) directly. Do not let a magnetic contactor, etc. intervene.
Otherwise, it may cause a malfunction.
Servo amplifier
U
V
W
To avoid an electric shock, insulate the connections of the power supply terminals.
Connect the wires to the correct phase terminals (U, V, and W) of the servo amplifier
and direct drive motor. Otherwise, the direct drive motor operates normally.
Do not connect AC power supply directly to the direct drive motor. Otherwise, it may
cause a malfunction.
POINT
Refer to section 14.8 for the specifications of the encoder cable to use.
Cabinet
Servo
amplifier
PE terminal
Direct drive motor Servo amplifier
U
V
M
W
Direct drive motor
14 - 4
Direct drive motor
U
U
V
V
M
W
W