Parker Hannifin
- 104 – Aries Controller Hardware Installation Guide
• Drive/Controller Protective Earth Conductor must be connected directly
to a reliable system safety Earth point. Total resistance from the
drive/controller’s Protective Conductor Terminal to a Reliable System
Safety Earth must not exceed 0.1 Ohm, and must be capable of
carrying 25A of Fault Current.
• Motor Safety Earth Conductor (for motor voltages greater than or equal
to 75 volts) must be connected to the drive/controller’s Motor Earth
terminal, marked with
.
• The drive/controller must be installed in a manner that prevents
operator access to hazardous, live terminals during normal operation.
Additional safety measures may be required within your particular market,
please consult you local regulatory agency for additional requirements.
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
drive/controller’s inherent noise immunity, the following recommendations
should be followed:
• Mount the drive/controller and all components to a common, clean (not
painted), 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 drive/controller in an equipment cabinet, terminate
cable braids (screens) as they enter the enclosure. This can be easily
accomplished using the “additional EMC installation hardware” shown
Figure 44 on page 109.
There is only
one exception: the motor braid must return to the
drive/controller’s R-clamp (located on the bottom of the drive/controller--
see Figure 44 on page 109). Do not retu
rn the motor braid to any other
location; its function is to return high-frequency chopping current back to
the drive/controller. This may require mounting the connector on a sub-
panel insulated from the main cabinet or using a connector having an
insulated internal screen from the connector housing.
The shields of all other 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 43 on page 105
illustrates 360° bonding techni
ques.
There must be no break in the 360° coverage that the screen provides
around the cable conductors.
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