2
L
OCATION REQUIREMENTS
CHAPTER 2 REQUIREMENTS
Requirements
Location requirements
To avoid premature aging of the controller; ensure user security; and facilitate access, upgrades, and
maintenance, the following guidelines must be followed:
• Install the controller:
– On a standard 48.26 cm (19 in.) equipment rack
– On a flat surface (such as a desk or a table)
• Install the controller in a well-ventilated location where it will not be exposed to high temperatures or
humidity.
– Storage temperature: -20 °C to +70 °C
– Operating temperature: 0 °C to +40 °C
– Humidity lower than 85% and non-condensing
• Do not install the controller in a location exposed to direct sunlight or near stoves or radiators. Exces-
sive heat could damage the internal components.
• Controller should be positioned to be accessible for future upgrade, maintenance and troubleshooting
and where cables can be easily connected.
• Maintain a minimum of 25 mm (1 in.) clearance in front, in the back, on top, under, and on the sides of
the controller.
• Keep airflow around and through the vents of the controller clear of any obstruction.
• Do not put books or paper on the controller.
Wiring Guidelines
These guidelines apply for any cable, supplied or not, used with an EX controller.
• Always use straight through cables.
• Cables must not pull or create a lateral stress on the connectors; that is, they must be long enough.
• Cables must be installed in such a way not to present a trip hazard to personnel working in the vicinity
of the equipment.
• Keep cables away from:
– Sources of electrical noise such as radios, transmitters, and broadband amplifiers
– Power lines
– Fluorescent lighting fixtures
– Liquids or moisture
– Heat sources
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