SD39RIO-1 INSTALLATION
January 2001
2-5
2.2.3 Environmental Considerations
Refer to section 6.2 for environmental specifications. In cases where a Remote I/O Rack is installed in an
enclosure such as a MODULPAC, the internal air temperature may be measured to be sure the specified
operating temperature of any installed assembly is not being exceeded. Each APACS+ or QUADLOG I/O
module contains an internal temperature sensor that activates an alarm if the module’s internal temperature
exceeds maximum specified limits. The air surrounding an I/O module must be within the specification
stated in the module’s documentation. The Remote I/O Rack has two built-in circulating fans to remove heat
from installed I/O modules.
CAUTION
Exceeding the specified operating temperature limits can adversely affect performance
and may cause damage.
Industrial environments often contain particulate, liquid, and gaseous contaminants. Particulate matter,
usually dust and dirt, is abrasive and can cause intermittent contact in connectors associated with the Remote
I/O Rack’s backplane. Liquid and gaseous contaminants can have a corrosive effect on metal, rubber, plastic
and circuit board components. Extended exposure to these contaminants may result in equipment
malfunction.
To reduce contaminant related equipment malfunctions:
• Identify contaminants and implement methods to reduce their presence.
• When cleaning equipment and surrounding area, especially the floor, either vacuum away all dust and dirt
or use a dampened rag or mop. Clean or replace all air conditioning and room air filters, and equipment
filters regularly. Inform all personnel with access to the equipment of the need for site cleanliness.
2.2.4 Equipment Delivery and Handling
The following subsections provide information of interest to shipping, receiving, and warehouse personnel.
2.2.4.1 Predelivery Inspection
The Remote I/O Rack is fully inspected prior to shipment. If a Remote I/O Rack is ordered factory-installed
on an instrument panel or within an enclosure, it is tested together (staged) as part of the overall system to
ensure proper operation.
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