User`s manual
Mounting the base unit Installation
MELSEC System Q, Hardware 9 – 9
9.4 Mounting the base unit
● Keep the clearances shown in following figure between the top/bottom faces of the module
and other structures or parts to ensure good ventilation and facilitate module replacement.
For wiring duct with 50 mm or less height.
40 mm or more for other cases.
Depending on length of extension cable.
45 mm or more when the Q7BAT is mounted.
● Do not mount the devices vertical or flat because the ventilation is not sufficient in this case.
● Mount the base unit on a flat surface. If the mounting surface is not even, this may strain the
printed circuit boards and cause malfunctions.
Fig. 9-5: Module mounting position
QH00006C
Fig. 9-6: Module mounting orientation
Indicates the panel top,
wiring duct or any part position
Wiring duct
50 mm or more
Main base unit
Extension base unit
30 mm or more
30 mm or more
30 mm or more
30 mm or more
Do
not
mount the base unit vertically or horizontally Orientation in which modules can be mounted