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16 Digitax ST User Guide
Issue: 5
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. In-built into the drive, is 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 very 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 EMC (Electromagnetic compatibility) on page 28.
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 Solutions Module / keypad installation
/ removal
Figure 3-3 Installation of a Solutions Module
The protective tab from the Solutions Module slot must be removed
before attempting to install a Solutions Module.
Figure 3-4 Installation of a keypad
Power down the drive before installing / removing the
Solutions Module. Failure to do so may result in damage to
the product.
Be aware of possible live terminals when installing the
keypad.
Not less
th an 2 X
B affle p late s (m a y b e
above or below bottom
of enclosure)
X
B o tto m o f fire
enclosure
Not less
than 2
times ‘X’
Baffle plates (may be above or
below bottom of enclosure)
Bottom of fire enclosure
X
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