Parker Hannifin PA Series - Manual (Page 15)

Chapter 2: Installing the PowerStation Selecting a Location
PA PowerStation User Guide
2-4
Enclosure Guidelines
Select an enclosure that is large enough to allow free airflow in and around
the unit. You should allow a minimum of 2 inches between the enclosure
and the top, bottom, and sides of the PA PowerStation to allow access to
the cabling and CompactFlash.
Also, make sure that the surface of the enclosure on which the PA
PowerStation is mounted is flat and free of raised or depressed areas.
Radiated Emissions Guidelines
This PowerStation has been tested to comply with international
electromagnetic and emission standards. To reduce radiated emissions,
ensure that there is a good earth connection to the PowerStation, which
can be accomplished by utilizing the grounding stud located on the rear
chassis of the product.This connection must be made with the shortest
possible, heavy gage wire or braided cable. Low-resistance (<0.5 ohms)
continuity should be verified with an ohmmeter for proper grounding. In
addition, all communication cables should be shielded and grounded on
only one end.