Mitsubishi Electric Melsec-Q172DCPU User Manual page 154

4 INSTALLATION AND WIRING
(c) Place the left-hand side pear-shaped hole of the base unit onto the left-hand
side screw.
(d) Fit the mounting screws into the holes at the bottom of the base unit, and
then retighten the all mounting screws.
(Note): Mount a main base unit to a panel, with no module installed in the right-
end slot.
Remove the base unit after removing the module from the right-end slot.
Panel
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