Mitsubishi Electric MR-J4 Instruction Manual page 736

APPENDIX
App. 4.4 Electrical Installation and configuration diagram
WARNING
CAUTION
The following shows representative configuration examples to conform to the IEC/EN/UL/CSA standards.
(1) 3-phase input for MR-J4 1-axis servo amplifier
Turn off the molded-case circuit breaker (MCCB) to avoid electrical shocks or
damages to the product before starting the installation or wiring.
The installation complies with IEC/EN 60204-1. The voltage supply to machines
must be 20 ms or more of tolerance against instantaneous power failure as
specified in IEC/EN 60204-1.
Connecting a servo motor for different axis to U, V, W, or CN2_ of the servo
amplifier may cause a malfunction.
(3-phase
230 V AC)
Power
supply
(3-phase
400 V AC)
Transformer (Note 3)
(star-connected)
To protective equipment
(Thermal signal) (Note 2)
Note 1. When the wire sizes of L1 and L11 are the same, MCCB or fuse is not required.
2. Please use a thermal sensor, etc. for thermal protection of the servo motor.
3. For 400 V class, a step-down transformer is not required.
MCCB MC
L1 L2 L3
or fuse
L11
L21
(Note 1)
MCCB
or fuse
PE
U/V/W/PE
Servo motor
App. - 11
Servo amplifier
P+
C
D
N-
CN8
STO
CN1
Controller
CN2
Encoder cable
Cabinet side
Machine side
Encoder