
3. SIGNALS AND WIRING
3 - 4
(1) For 3-phase 200 V AC to 240 V AC power supply of MR-J4-10B to MR-J4-350B
MC
(Note 7)
ALM
DICOM
DOCOM
CN3
(Note 5)
24 V DC
Malfunction (Note 4)
RA1
L1
L2
L3
3-phase
200 V AC to
240 V AC
Servo amplifier
P3
P4
P+
L11
L21
N-
D
C
U
V
W
(Note 1)(Note 10)
(Note 2)
CNP1
CNP3
PE
CNP2
Servo motor
U
V
W
M
Motor
Encoder
CN2
(Note 3)
Encoder
cable
(Note 6)
(Note 4)
Malfunction
RA1
OFF
MC
ON
MC
SK
EMG stop switch
CN3
(Note 5) Forced stop 2 EM2
DOCOM
CN8
(Note 9)
Short-circuit connector
(Packed with the servo amplifier)
(Note 8)
Main circuit power supply
MCCB
Note 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Always connect P3 and P4 terminals. (factory-wired) When using the power factor improving DC reactor, refer to section
11.1. Use either the power factor improving DC reactor or the power factor improving AC reactor.
Always connect P+ and D. (factory-wired) When using the regenerative option, refer to section 11.2.
For the encoder cable, use of the option cable is recommended. For connecting servo motor power wires, refer to Servo
Motor Instruction Manual (Vol. 3).
If disabling ALM (Malfunction) output with the parameter, configure up the power supply circuit which switches off the
magnetic contactor after detection of alarm occurrence on the controller side.
This diagram is for sink I/O interface. For source I/O interface, refer to section 3.8.3.
For connecting servo motor power wires, refer to each Servo Motor Instruction Manual (Vol. 3).
Use a magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of
contacts) of 80 ms or less. Depending on the main circuit voltage and operation pattern, bus voltage decreases, and that
may cause the forced stop deceleration to shift to the dynamic brake deceleration. When dynamic brake deceleration is not
required, slow the time to turn off the magnetic contactor.
Configure up a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the servo
amplifier.
When not using the STO function, attach a short-circuit connector supplied with a servo amplifier.
When wires used for L11 and L21 are thinner than wires used for L1, L2, and L3, use a molded case circuit breaker. (Refer
to section 11.10.)
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