Mitsubishi Electric MELSEC-Q Series User Manual page 66

(3) Unit mounting orientation
(a) Since the programmable controller generates heat, it should
be mounted on a well ventilated location in the orientation
shown below.
(b) Do not mount it in either of the orientations shown below.
Vertical
(4) Mount base unit on a flat surface. If the mounting surface is not
even, this may strain the printed circuit boards and cause
malfunctions.
(5) Avoid mounting base unit in proximity to vibration sources such as
large magnetic contractors and no-fuse circuit breakers; mount
these on a separate panel or at a distance.
(6) In order to avoid the effects of radiated noise and heat, provide the
clearances indicated below between the programmable controller
and devices that generate noise or heat (contactors and relays).
• Required clearance in front of programmable controller: at least
100 mm (3.94 inches)
• Required clearance on the right and left of programmable
controller: at least 50 mm (1.97 inches)
At least 100mm
(3.94 inches)
Contactor,
relay, etc.
Flat
At least 50mm
(1.97 inches)
32
At least 50mm
(1.97 inches)