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Basic Insta llation 3-3MN1919
3.2 Mechan ical installation and cooling requirements
It is essential that you read and understand this section before beginning the
installation
.
CAUTION: To prevent equipment damage, be certain that the input power has
correctly rated protective devices installed.
CAUTION: To prevent equipment damage, be certain that input and output signals
are powered and referenced correctly.
CAUTION: To ensure reliable performance of this equipment be certain that all
signals to/from the MicroFlex are shielded correctly .
CAUTION: Avoid locating the MicroFlex immediately above or beside heat generating
equipment, or directly below water steam pipes.
CAUTION: Avoid locating the MicroFlex in the vicinity of corrosive substances or
vapors, metal particles and dust.
CAUTION: Failure to meet cooling air flow requirements will result in reduced product
lifetime and/or drive overtemperature trips.
The safe operation of this equipment depends upon its use in the appropriate environment.
The following points must be considered:
H The MicroFlex must be installed indoors, permanently fixed and located so that it can only
be accessed by service personnel using tools.
H The maximum suggested operating altitude is 1000m (3300ft).
H The MicroFlex must be installed where the pollution degree according to IEC664 shall not
exceed 2.
H The 24VDC control circuit supply must be installed so that the 24VDC supplied to the unit
is isolated from the AC supply using double or reinforced insulation.
H The input of the control circuit must be limited to Safety Extra Low Voltage circuits.
H Both the AC supply and the 24VDC supply must be fused.
H The atmosphere must not contain flammable gases or vapors.
H There must not be abnormal levels of nuclear radiation or X-rays.
H To comply with CE directive 89/336/EEC an appropriate AC filter must be installed.
H The MicroFlex must be secured by the slots in the flange. The protective earth/ground (the
threaded hole on the top of the MicroFlex) must be bonded to a safety earth/ground using
either a 25A conductor or a conductor of three times the peak current rating - whichever is
the greater.
H The threaded holes in the top and bottom of the case are for cable clamps. The holes are
threaded for M4 bolts no longer than 11mm (0.43 in) in length.
H Each D-type connector on the front panel of the MicroFlex is secured using two hexagonal
jack screws (sometimes known as “screwlocks”). If a jack screw is removed accidentally
or lost it must be replaced with a jack screw with an external male threaded section no
longer than 10mm (0.4 in).
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