Mitsubishi Electric MELSERVO-J3 Series Handbook page 562

Part 8: Review on Replacement of Optional Peripheral Equipment
(d) Mounting dimensional diagram
(2) MR-J3ACN
(a) Panel cut dimensions
(b) How to assemble the attachment for panel through attachment
Servo amplifier
196
240
203
Punched
hole
236
255
270
Attachment
Screw
(2 places)
8 - 77
Attachment
Servo amplifier
155
Mounting hole
Approx. 263.3
[Unit : mm]
4-M10 Screw
[Unit: mm]
20.6
Panel
Panel
3.2
108.3