Input Power Supply Circuit - Mitsubishi Electric MR-J3-B Instruction Manual

3. SIGNALS AND WIRING

3.1 Input power supply circuit

CAUTION
Wire the power supply/main circuit as shown below so that power is shut off and the servo-on command turned
off as soon as an alarm occurs, a servo forced stop is made valid, or a controller forced stop is made valid. A
no-fuse breaker (NFB) must be used with the input cables of the main circuit power supply.
(1) For 3-phase 200 to 230VAC power supply to MR-J3-10B to MR-J3-350B
NFB
3-phase
200 to
230VAC
Forced stop
(Note 5)
Note 1. Always connect P -P
1
2. Always connect P-D. (Factory-wired.) When using the regenerative brake option, refer to Section 11.2.
3. For connection of the servo amplifier and servo motor, use of the option cable is recommended. Refer to Section 11.1 for
selection of the cable.
4. If deactivating output of trouble (ALM) with parameter change, configure up the power supply circuit which switches off the
magnetic contactor after detection of alarm occurrence on the controller side.
5. For the sink I/O interface. For the source I/O interface, refer to Section 3.7.3.
When the servo amplifier has become faulty, switch power off on the servo
amplifier power side. Continuous flow of a large current may cause a fire.
Use the trouble signal to switch main circuit power supply off. Otherwise, a
regenerative brake transistor fault or the like may overheat the regenerative brake
resistor, causing a fire.
POINT
Even if alarm has occurred, do not switch off the control circuit power supply.
When the control circuit power supply has been switched off, optical module
does not operate, and optical transmission of SSCNET communication is
interrupted. Therefore, the servo amplifier on the rear axis displays "AA" at
the indicator and turns into base circuit shut-off. The servo amplifier stops
with starting dynamic brake.
(Note4) Controller
Alarm forced stop
RA1 RA2
MC
(Note 1)
(Note 2)
. (Factory-wired.) When using the power factor improving DC reactor, refer to Section 11.10.
2
Forced
ON
OFF
stop
MC
Servo amplifier
CNP1
L
1
CNP3
(Note 3)
L U
2
L V
3
N W
P
1
P
2
PE
CNP2
P
C
D
CN2
Encoder cable
L
11
L
21
CN3 CN3
EM1
DOCOM
DOCOM DICOM
ALM
3 - 2
MC
SK
Servo motor
U 2
Motor
V 3
M
W 4
1
(Note 3)
Encoder
24VDC
RA1 Trouble
(Note 4)
(Note 5)