Parker PAC, Installation Manual, Page: 23 / 197

Installation Guidelines
The following section provides installation guidelines to ensure the use of best practices regarding agency,
thermal, safety, and EMI considerations.
Regulatory Installation Guidelines
The PAC System is designed for use in industrial environments. It is to be installed in an industrial
enclosure and factory wired according to National Electric Code (NEC) guidelines.
When installing the Controller and PACIO, you can either use a 24VDC Limited Power Source (LPS) or
Class 2 power circuit available in the control cabinet, a purchased LPS or Class 2 power supply, or an
optional Parker model PS-60W Class 2 power supply, purchased separately.
Important: The Controller and PACIO Modules must be mounted in a suitable tool-
accessed fire enclosure to comply with requirements set forth by CE
Safety directive.
Important: A Limited Power Source (LPS) power supply or circuit according to IEC
60950-1, or an NEC Class 2 power source must be used to provide
power to the PAC. NEC Class 2 circuits are considered to be safe from a
fire ignition standpoint and provide an acceptable protection against
electric shock.
Thermal Guidelines
You can safely operate the PAC System within the temperature specified in the Environmental
Specifications in Appendix A. However, when using a protective enclosure, remember that the temperature
within an enclosure is generally higher than the external temperature. Read the following guidelines to
fully understand temperature implications.

ust, oil, moisture, and corrosive vapors
in order to minimize maintenance and repair costs.

Be sure to choose an area for the PAC that is free from moisture or condensing humidity.
Heat builds up rapidly in enclosed environments, compromising the performance and life span of
electrical equipment. If the PAC operates inside an enclosure at temperature levels above its rated
ambient temperature, you must cool the enclosure.
The PAC has been tested for use in 50 degrees Celsius (
º
C) ambient, still-air locations. This means that
when installed, the ambient air surrounding the Controller is not expected to exceed 50
º
C. An example of
this type of installation would be the PAC mounted in a small, sealed industrial enclosure.
The most commonly overlooked aspect of this type of installation is that heat generated by the device, and
other devices in the enclosure, becomes trapped and increases the ambient temperature immediately
surrounding the PAC. This increase in temperature can sometimes exceed an additional 10
º
C or more.