15 - 28
15. SERVO AMPLIFIERS WITH A LARGE CAPACITY
30k TO 55kW
(b) 400V class (MR-J3-DU30KA4 to MR-J3-DU55KA4)
Emergency stop
(EMG EM1)
(Note 3)
RA3RA1 RA2 OFF/ON
MC
SK
MC
(Note 6)
NFB
(Note 3)
RA2
(Note 4)
Stepdown
transformer
L
L
L
1
L2
L
3
L11
L21
3-phase
380 to 480VAC
50/60Hz
1MC1
2MC2
CN40 CN40A
CN2
BW
BV
BU
M
OHS2
V
U
W
CN40B
V
U
W
Servo motor
TE2-2
L
L
TE2-1
C
L11
L
21
PC
S400R400
CNP1
CN1
EMG
46
42
SON
DICOM
21
ALM48
DOCOM
20
DICOM
SDPlate
15
CN1
1
DICOM
5
DOCOM
6
DICOM
2ALM
7EM1
9
DOCOM
P
1
P2
(Note 2)
24VDC
24VDC
(Note 5)
Power
supply
NFB
OHS1
24VDC
RA3
(Note 3)
RA1
Converter unit Drive unit
Termination
connector
MR-J3-TM
(Option)
MR-J3CDL05M
cable
External
dynamic brake
(Option)
Encoder
Cooling fan
Encoder cable
Servo
motor
thermal
relay
Power factor improving
DC reactor (Option)
Converter
unit trouble
Servo motor
thermal relay
Operation
-ready
Drive
unit trouble
Regenerative
option(Note 1)
G4G3
Cooling fan
PC
S400R400
Regenerative
option(Note 1)
G4G3
Cooling fan
PC
S400R400
Regenerative
option(Note 1)
G4G3
Cooling fan
(Note 7)
Note 1. For the MR-RB138-4. For the MR-RB138-4, three units are used as one set (permissible wattage: 3900W).
2. When using the Power factor improving DC reactor, disconnect the short bar across P
1-P2.
3. Make up a sequence that will concurrently turn off the Emergency stop (EMG) of the drive unit and the Forced stop (EM1) of the
converter unit, and shut off the main circuit power supply by the external sequence.
4. Stepdown transformer is required for coil voltage of magnetic contactor more than 200V class.
5. For specifications of cooling fan power supply, refer to section 15.3.8.
6. 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.
7. Use an external dynamic brake for the drive unit. 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.
