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3. SIGNALS AND WIRING
(7) MR-J3-11KA to MR-J3-22KA
External dynamic
brake (option)
(Note 10)
NFB
L
1
L2
L3
P
C
U
V
W
TE
PE
L
11
L
21
U
V
W
P
1
Regenerative
resistor
OHS2OHS1
Servo motor
thermal relay
Cooling fan
BU
BV
BW
24VDC
RA2
(Note 6)
(Note 4)
Servo motor
thermal relay
SON
EMG
3-phase
200 to
230VAC
ALM
DICOM
DOCOM
(Note 1)
(Note 2) M
Motor
Encoder
CN2
(Note 3)
Encoder cable
(Note 5)
DOCOM
CN1 CN1
24VDC
Trouble
(Note 4)
MCNFB
RA1
Servo motorServo amplifier
Emergency stop (Note 8)
Servo-on
RA2
Emergency stop
(Note 8)
(Note 9)
OFF
MC
ON
MC
SK
Trouble
RA1
(Note 7)
Power supply
of cooling fan
Note 1. Always connect P and P1. (Factory-wired.) When using the power factor improving DC reactor, refer to section 12.13. Use only
one of power factor improving DC reactor or power factor improving AC reactor.
2. When using the regenerative option, refer to section 12.2.
3. For the encoder cable, use of the option cable is recommended. Refer to section 12.1 for selection of the cable.
4. For the sink I/O interface. For the source I/O interface, refer to section 3.8.3.
5. Refer to section 3.10.
6. When the power supply for the cooling fan is 1-phase, BW does not exist.
7. For the cooling fan power supply, refer to section 3.10.2 (3) (b).
8. Configure the circuit to shut down the main circuit power supply simultaneously with the turn off of emergency stop (EMG) using
the external sequence.
9. Be sure to use a magnetic contactor with an operation delay time of 80ms or less. The operation delay time is the time interval
between current being applied to the coil until closure of contacts.
10. Use an external dynamic brake for this servo amplifier. Failure to do so will cause an accident because the servo motor does
not stop immediately but coasts at an emergency stop and such conditions. Ensure the safety in the entire system.