Input Power Supply Circuit - Mitsubishi Electric Melservo-J3 Series 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 200V to 230VAC power supply to MR-J3-10B to MR-J3-350B
NFB
3-phase
200 to
230VAC
(Note 5)
Always connect a magnetic contactor (MC) between the main circuit power supply
and L L and L of the servo amplifier, and configure the wiring to be able to shut
1, 2, 3
down the power supply on the side of the servo amplifier's power supply. If a
magnetic contactor (MC) is not connected, continuous flow of a large current may
cause a fire when the servo amplifier malfunctions.
Use the trouble signal to switch main circuit power supply off. Otherwise, a
regenerative transistor fault or the like may overheat the regenerative 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.
(Note 4) Controller
Alarm forced stop
RA1 RA2
MC
(Note 1)
(Note 2)
Forced stop
Forced
ON
OFF
stop
MC
Servo amplifier
CNP1
L
1
CNP3
(Note 6)
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)