Digitax HD M75X Series Installation and Technical Guide
17
Issue Number: 5
Figure 3-1 Fire enclosure bottom layout
The bottom, including the part of the side considered to be part of the bottom, must be designed to prevent escape of burning material - either by
having no openings or by having a baffle construction. This means that openings for cables etc. must be sealed with materials meeting the 5VB
requirement, or else have a baffle above. See Figure 3-2 for acceptable baffle construction. This does not apply for mounting in an enclosed electrical
operating area (restricted access) with concrete floor.
Figure 3-2 Fire enclosure baffle construction
3.2.6 Electromagnetic compatibility
Variable speed drives are powerful electronic circuits which can cause electromagnetic interference if not installed correctly with careful attention to
the layout of the wiring.
Some simple routine precautions can prevent disturbance to typical industrial control equipment.
If it is necessary to meet strict emission limits, or if it is known that electromagnetically sensitive equipment is located nearby, then full precautions
must be observed. The drive has an internal EMC filter, which reduces emissions under certain conditions. If these conditions are exceeded, then the
use of an external EMC filter may be required at the drive inputs, which must be located close to the drives. Space must be made available for the
filters and allowance made for carefully segregated wiring. Both levels of precautions are covered in section 4.10
3.2.7 Hazardous areas
The drive must not be located in a classified hazardous area unless it is installed in an approved enclosure and the installation is certified.
3.3 SI Option module installation
When connecting SI option modules, an additional SI option mounting kit is required, if the drive is not supplied with a SI option mounting kit fitted.
The SI option mounting kit can be ordered from the supplier of the drive. Refer to section 2.8
Installation and system accessories
on page 14 for more
information.
For fitting instructions, refer to Figure 3-3.
Drive
5
o
5
o
Remove the AC/DC power as well as the 24 Vdc supply to the drive before installing / removing the option module. Failure to do so may
result in damage to the product.
Care must be taken when handling the option module interface card to avoid contaminating the gold contacts. Gold contacts must not be
touched directly, handle the interface card using the protective cover provided in the mounting kit.
N o t l e s s
t h a n 2 X
B a f f l e p l a t e s ( m a y b e
a b o v e o r b e l o w b o t t o m
o f e n c l o s u r e )
X
B o t t o m
o f f i r e
e n c l o s u r e
Not less
than 2
times ‘X’
Baffle plates (may be above or
below bottom of enclosure)
Bottom of fire enclosure
X
CAUTION
CAUTION
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