Free space around the unit
Required free space around the drive to enable cooling air flow, service and
maintenance is shown below in millimeters and [inches]. When you install IP55 units
above one another, leave 200 mm (7.9 in.) of free space above and below the unit.
200 [7.9]
50 [2.0]
300 [12]
IP21 (UL 1)
50 [2.0]
50 [2.0]
Air flow (side view)
Mechanical installation 31
50 [2.0]
50 [2.0]
50 [2.0]
IP55 (UL 12)