sh030051g.pdf - 第380页
13 - 79 13. SERVO AMPLIFIERS WI TH A LARGE CAPACITY ( 30k TO 55kW ) 13.9.3 External dynamic brake POINT Configure up a sequence which switches off the contact of the brake unit after (or as soon as) it has turned off the…
13 - 78
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
(5) Outline dimension drawings
[Unit:mm]
MR-RB139 MR-RB136-4
Mass
[kg(lb)]
11(24.25)
10(22.05)
10
15
15
TE1
10 480
500
10
10
2- 10 hole
Regenerative option
R
(Note 2)
G4 G3 C P
260
230
215
197
MR-RB137 MR-RB138-4
Terminal block signal layout
TE1
Terminal screw: M5
Tightening torque: 2.0 [N m] (17.7 [lb in])
Mounting screw
Screw size: M8
Tightening torque: 13.2 [N m] (117 [lb in])
2.3
15
S
(Note 2)
Cooling fan (Note 1)
Note 1. One cooling fan for MR-RB136-4, MR-RB138-4.
2. For MR-RB138-4, “R” is “R400” and “S” is “S400”.
13 - 79
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
13.9.3 External dynamic brake
POINT
Configure up a sequence which switches off the contact of the brake unit after
(or as soon as) it has turned off the servo on (signal) at a power failure or
failure.
For the braking time taken when the dynamic brake is operated, refer to
section 13.8.3.
The brake unit is rated for a short duration. Do not use it for high duty.
The specifications of the input power supply for external dynamic brake are
the same as those of the converter unit control circuit power supply.
Operation timing is the same as that for servo amplifiers with 22kW or less.
Refer to section 11.6.
(1) Selection of dynamic brake
The dynamic brake is designed to bring the servo motor to a sudden stop when a power failure occurs or
the protective circuit is activated. When using the external dynamic brake, assign the dynamic brake
interlock (DB) to any of CN3-9, CN3-13, and CN3-15 pins in parameter No.PD07 to PD09.
Converter unit Drive unit Dynamic brake
MR-J3-CR55K
MR-J3-DU30KB
DBU-37K
MR-J3-DU37KB
MR-J3-DU30KB4
DBU-55K-4
MR-J3-CR55K4
MR-J3-DU37KB4
MR-J3-DU45KB4
MR-J3-DU55KB4
(2) Connection example
Use the following wires to connect the dynamic brake.
Dynamic
brake
Wire[mm
2
] (Note)
a b U V W
DBU-37K
2 14
DBU-55K-4
Note. Selection condition of wire size is as follows.
Wire type: 600V Polyvinyl chloride insulated wire (IV wire)
Construction condition: One wire is constructed in the air
13 - 80
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
EM1
(Note 3)
NFB
L1
L2
L
3
L11
L
21
U
1MC1
2MC2
CNP1
L11
L21
CN3
RA1
RA4
RA1
MC
SK
(Note 2)
RA2 RA3
CN1
1
DICOM
5
DOCOM
6
DICOM
2ALM
7EM1
9
DOCOM
MC
Forced stop
(Note 5)
L
1
L2
L
3
L11
L
21
U
V
W
U
V
W
M
Servo motor
(Note 4)
Power
supply
Drive unitConverter unit
a
b
13 W14 V U
Dynamic brake
(Note 1)
EM1
3
20
SDPlate
DICOM
10
DB
(Note 3)
DOCOM
5
DICOM
ALM15
L
L
L
L
Converter
unit
Controller
forced stop
Operation
-ready
Drive
unit
OFF/ON
(Note 5)
Forced stop
RA4
RA2
Note 1 Terminals 13, 14 are N/O contact outputs. When the dynamic brake has stuck, terminals 13, 14 are opened. Therefore, configure
up the circuit to prevent servo-on in the external sequence.
2. For converter unit and servo amplifier 400 V class, stepdown transformer is required for coil voltage of magnetic contactor more
than 200 V class.
3. Assign the dynamic brake interlock (DB) in parameter No.PD07 to PD09.
4. Refer to section 13.1.3 for the power supply specifications.
5. Make up a sequence that turns off the drive unit forced stop (EM1) and the converter unit forced stop (EM1) at the same time.