Site Selection and Building Requirements Section 2 Installation
60 3BSE036351-510 A
When planning a control system installation, the following points must be
considered:
• Temperature:
– It is important to note the ambient air temperature as well as that within
enclosures. Lower temperatures increase system reliability and
availability.
– If maximum permitted temperatures are exceeded, the anticipated lifetime
of wet, electrolytic capacitors and most semiconductors will be greatly
reduced.
• Vibration:
– Regarding routine vibration it is recommended that floor
enclosures/cabinets stand on a sound, level surface, and that wall
enclosures/cabinets are mounted on sound, vertical walls.
– Should the AC 800M system be installed in a control room, adjacent to
large machinery such as shakers or large presses where frequent major
vibration is expected, then shock absorbers or an isolation pad may be
required to protect system equipment. Shock absorbers will normally
protect the equipment from sustained low-level vibrations that are
perceivable, but not unduly excessive.
– It is recommended that additional fastening screws be used to prevent
vibration-generated noise.
– If vibrations or shock are a major factor, further consideration must be
given to more extreme measures to reduce the problem.
• Cooling:
– Cooling the electronics is achieved by self-convection. The AC 800M
units are designed for wall mounting and must be mounted horizontally
onto a DIN-rail to avoid generating high temperatures within the units.
– ABB cabinets (RM550 or RE820) may be used up to an ambient
temperature of 40°C (104°F), with no requirement for additional cooling
equipment, such as fans.
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