Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 392

13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
Note 1. For power supply specifications, refer to section 13.1.3.
2. Configure the circuit to turn OFF the forced stop (EM1) of the drive unit and the converter unit at the same time.
3. Always connect between P
section 13.9.6.
4. Connect P/ and N/
brake unit malfunction.
5. For the converter unit and the drive unit of 400V class, a stepdown transformer is required.
6. Contact rating: 1b contact, 110VAC_5A/220VAC_3A
Normal condition: TH1-TH2 is conducting. Abnormal condition: TH1-TH2 is not conducting.
7. Contact rating: 230VAC_0.3A/30VDC_0.3A
Normal condition: B-C is conducting/A-C is not conducting. Abnormal condition: B-C is not conducting/A-C is conducting.
8. Connect the thermal relay censor of the servo motor.
9. Do not connect more than one cable to each L
10. Always connect between BUE and SD terminals (Factory-wired).
11. Connect MSG and SD terminals of the brake unit to a correct destination. Wrong connection results in the converter unit and
brake unit malfunction.
12. For connecting L
this section.
(c) Precautions for wiring
The cables between the converter unit and the brake unit, and between the resistor unit and the brake
unit should be as short as possible. Always twist the cable longer than 5m (twist five times or more per
one meter). Even when the cable is twisted, the cable should be less than 10m. Using cables longer
than 5m without twisting or twisted cables longer than 10m, may result in the brake unit malfunction.
Converter unit
(d) Cables
1) Cables for the brake unit
For the brake unit, HIV cable (600V grade heat-resistant PVC insulated wire) is recommended.
a) Main circuit terminal
N/ P/
Terminal block
and P terminals (Factory-wired). When using the power factor improving DC reactor, refer to
1 2
terminals of the brake unit to a correct destination. Wrong connection results in the converter unit and
and L - terminals of TE2-1 of the converter unit to the terminal block, use the cable indicated in (3) (d) of
Brake unit
P P
P
N PR
N
5m or less 5m or less
Brake unit
PR
200V
FR-BU2-55K
class
400V FR-BU2-H55K
class FR-BU2-H75K
and L terminals of TE2-1 of the converter unit.
Converter unit
Resistor unit
P
PR
Main Crimping
circuit terminal
terminal
N/ , P/ ,
screw
PR,
size
M6 14-6
M5 5.5-5
M6 14-6
13 - 95
Brake unit
P Twist P P Twist
N N PR
10m or less 10m or less
Cable size
Tightening
N/ , P/ , PR,
torque
HIV cables,
[N m]
2
etc. [mm ]
4.4 14
2.5 5.5
4.4 14
Resistor unit
P
PR
AWG
6
10
6