Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 270

Part 7: Common Reference Material
MR-J2S series dimensions
MR-J2S-500_4
Servo amplifier Mass [kg]
MR-J2S-350A4/B4
5
MR-J2S-500A4/B4
MR-J2S-700_4
2-φ6 mounting hole
Servo amplifier Mass [kg]
MR-J2S-700A4/B4 7.2
MR-J2S-11K_4, MR-J2S-15K_4
Terminal layout
diagram
Fan
Blowing direction of cooling fan
Servo amplifier Mass [kg]
MR-J2S-11KA4/B4 15
MR-J2S-15KA4/B4 16
MR-J4 series dimensions
MR-J4-11K_4, MR-J4-15K_4
7 - 31
MR-J4-500_4
MR-J4-700_4