Parker PAC, Installation Manual, Page: 26 / 197

INSTALLATION
26 Parker Automation Controller Installation Guide
Switching inductances from relays, contactors, solenoids, or switching magnets can produce significant
surge voltages. It is necessary to reduce these inductive spikes to a minimum whenever possible, which
may require diodes, Z-diodes, varistors, or RC elements. We recommend that you contact the
manufacturer or supplier of the corresponding actuators relevant information regarding surge protection.
DIN Rail Guidelines
It is highly recommended that the Controller and PACIO Modules are assembled on a DIN rail, even during
temporary setups for application development. The Controller and PACIO must be mounted on a DIN rail
in the final installation. Failure to do so may cause damage to the E-Bus interconnections or result in
intermittent or unintended system operation.
The mounting system is designed to attach to an EN 50022, 35 x 7.5 mm DIN rail.
Mount the DIN rail horizontally on the enclosure sub-plate. Remember to allow for ventilation clearance
above, below, and at each side. (Refer to Thermal Guidelines.)
Provide additional DIN rail length to allow for sliding the PACIO Modules to the right for module removal
and/or replacement.
Ensure that the DIN rail is properly Earth grounded to the enclosure sub-plate. Remove any paint from any
threaded mounting holes or around the mounting nut area to ensure a good connection to the Earth
ground.
Calculate the overall length of DIN rail required for the installation base on the following component
widths. Be sure to include extra length for adding additional modules in the future and a clearance
allowance for removing modules.
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