
B–63783EN/01
3. INSTALLATION
11
Connector panel I/O module or
I/O base unit
(No screws or protrusions shall
extend from the bottom of this
unit.)
Bottom
Top
D If the CNC unit is installed at an altitude of over 1,000 m, an upper
limit is placed on the ambient temperature (one of the environmental
conditions described in Section 3.1) for the CNC within the cabinet.
Each increment of 100 m over 1,000 m requires that 1.0°C be
subtracted from the maximum allowable ambient temperature for the
CNC in the cabinet.
Example) If a cabinet containing the CNC is installed at an altitude
of 1,750 m, the maximum allowable ambient temperature
for the CNC is: 55°C – 750/100 × 1.0°C = 47.5°C
The allowable ambient temperature range for the CNC is therefore
from 0°C to 47.5°C.
If the hard disk drive in the CNC is used, the CNC can be installed only
at an altitude ranging from:
–60 to 3,000 m when in operation
–60 to 12,000 when not in operation
D Unspecified frequencies may cause the CNC control unit and hard disk
drive to vibrate at their resonance frequency, possibly subjecting unit
components to an acceleration higher than allowable. After mounting
the CNC control unit on your machine, carefully check for any
abnormal conditions.
CAUTION
For a control unit with a hard disk, data stored on the hard
disk may be destroyed due to operator errors or accidents
even when the environmental conditions above are
satisfied. To guard against such data loss, back up the
important hard disk data regularly. In particular, never turn
off the power, even momentarily, while the hard disk is being
accessed or the operating system is running, as doing so is
highly likely to destroy part of the contents of the disk. End
users should be made fully aware of this, to ensure that they
do not inadvertently lose important data.