Parker Hannifin
A Highly-Immune, Low-Emission Installation—Meeting the
Requirements of the Electromagnetic Compatibility (EMC)
Directive
The following information was compiled to aid the machine builder or
systems integrator in gaining EMC compliance. For effective control of
Conducted and Radiated Emissions, along with maximizing the ACR90x0
Controller’s inherent noise immunity, the following recommendations should
be followed.
• For EMC compliance, the ACR90x0 controller must be installed within
an earth-bonded metallic enclosure. The enclosure must provide at
least 10 dB of shielding effectiveness for a Class A (industrial)
installation. For ESD purposes, the enclosure also must restrict user
access to discrete input and output conductors, which are located on
the front of the ACR90x0 enclosure.
• Mount the controller and all components to a clean (unpainted),
earthed, metal panel.
Important!
To reduce the risk of electrical noise entering your system you must
properly earth ground the enclosure, and remove all paint and other
non-conductive surface coatings from the panel mounting surface and
RF earth bonding locations.
If you mount the ACR90x0 controller in an equipment cabinet, terminate
cable braids (screens) at the entrance of the enclosure. This can be
easily accomplished using the additional EMC installation hardware
shown below.
The shields of all cables that enter or exit the enclosure must be RF
bonded to the enclosure entrance point using an R-Clamp, bulkhead
clamshell clamp, or other 360° bonding technique. This ensures that no
stray noise will enter or exit the enclosure. Figure 36 illustrates 360°
bonding techniques.
Figure 36 360° Bonding Techniques
152 ACR9000 Series Hardware Installation Guide
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