sh030051g.pdf - 第379页
13 - 78 13. SERVO AMPLIFIERS WI TH A LARGE CAPACITY ( 30k TO 55kW ) (5) Outline dimension drawings [Unit:mm] MR-RB139 MR-RB136-4 Mas s [kg (lb )] 11(24.25) 10(22.05) 10 15 15 TE1 10 480 500 10 10 2- 10 hole Regenerative …
13 - 77
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
(b) MR-RB137
MR-RB138-4
POINT
Three of MR-RB137 or MR-RB138-4 are required per converter unit. Please
purchase three of MR-RB137 or MR-RB138-4.
RA
(Note 2)
CPCPCP
Regenerative
option
Converter unit
P
1
P2
(Note 1)
Power factor improving
DC reactor (Option)
C
Servo motor
G4G3
Cooling fan
5m or less
(Note 3)
Power supply
24VDC
power supply
Servo motor
thermal relay
OHS1 OHS2
RS
Regenerative
option
G4G3
Cooling fan
RS
Regenerative
option
G4G3
Cooling fan
RS
(Note 4)(Note 4) (Note 4)
Note 1. When using the Power factor improving DC reactor, remove the short bar across P1-P2.
2. G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5V/4.8VDC
Maximum capacity: 2.4VA
3. For specifications of cooling fan power supply, refer to Table 13.3.
4. For MR-RB138-4, “R” is “R400” and “S” is “S400”.
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