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APPENDIX
App. - 11
App. 4.4 Electrical Installation and configuration diagram
WARNING
Turn off the molded-case circuit breaker (MCCB) to avoid electrical shocks or
damages to the product before starting the installation or wiring.
CAUTION
The installation complies with IEC/EN 60204-1. The voltage supply to machines
must be 20 ms 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.
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
MCCB
or fuse
Controller
STO
Encoder cable
(3-phase
230 V AC)
Power
supply
(3-phase
400 V AC)
Transformer (Note 3)
(star-connected)
(Note 1)
MCCB
or fuse
PE
L11
L21
MC
Servo amplifier
Cabinet side
Machine side
Encoder
Servo motor
L1
C
P+
D
N-
U/V/W/PE
CN2
CN1
CN8
L2L3
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.
(2) 1-phase input for MR-J4 1-axis servo amplifier
MCCB
or fuse
Controller
STO
Encoder cable
(1-phase
230 V AC)
Power
supply
(3-phase
400 V AC)
Transformer
(star-connected)
(Note 1)
MCCB
or fuse
PE
L11
L21
MC
Servo amplifier
Cabinet side
Machine side
Encoder
Servo motor
L1
C
P+
D
N-
U/V/W/PE
CN2
CN1
CN8
L2L3
(Note 2)
(Note 2)
To protective equipment
(Thermal signal) (Note 3)
Note 1. When the wire sizes of L1 and L11 are the same, MCCB or fuse is not required.
2. When using a 100 V class servo amplifier, step down the power supply voltage to
100 V and connect the main circuit power supply lines to L1 and L2. For 1-phase
200 V AC servo amplifiers, connect the lines to L1 and L3.
3. Please use a thermal sensor, etc. for thermal protection of the servo motor.