Mr-J4 Series; Dimensions; Mr-J3 Series - Mitsubishi Electric MELSERVO-J3 Series Handbook

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_

7.6.2 MR-J4 series

The external dynamic brake is designed to bring the servo motor to a sudden stop when a power failure
occurs or the protective circuit is activated. For MR-J4-DU_A_ drive unit, assign DB to any of CN1-22 to
CN1-25, CN1-49, CN1-13 and CN1-14 pins in [Pr. PD23] to [Pr. PD26], [Pr. PD28] and [Pr. PD47]. For MR-
J4-DU_B_ drive unit, assign DB to any of CN3-9, CN3-13, and CN3-15 pins in [Pr. PD07] to [Pr. PD09].
Converter unit

7.7 Dimensions

7.7.1 MR-J3 series

(1) MR-J3-CR55K_
20
MR-J4-DU30K_
MR-CR-55K
MR-J4-DU37K_
MR-J4-DU30K_4
MR-J4-DU37K_4
MR-CR55K4
MR-J4-DU45K_4
MR-J4-DU55K_4
2- 7 Installation hole
300
260
CHARGE
TE2-2
TE1-1 TE1-2
7
Drive unit External dynamic brake
Approx. 20
Approx. 200
Approx. 80
TE3
5 - 78
DBU-37K-R1
DBU-55K-4-R5
[Unit: mm]
Cooling fan
wind direction
328
128
180