Parker Hannifin
Appendix A Additional Specifications - 85 -
Current Foldback
The Aries Controller’s current foldback circuit helps to protect the unit from
damage due to prolonged high currents.
If your unit is operating above its continuous current rating, see Figure 42 to
predi
ct the number of seconds until foldback will occur. For example, the
figure shows that at the drive/controller’s peak current rating (250% of
continuous), foldback will occur after six seconds. After operating at the its
peak current, the Aries Controller will reduce the drive/controller current to
80% of the its continuous rating for 60 seconds. This is to ensure the unit’s
average continuous current rating is not exceeded.
Figure 42 Time Until Current Foldback Occurs
Cables
EMC Ready Cables
Many Parker cables are EMC installation ready. If installed according to
instructions provided under A Highly-Immune, Low-Emission Installation—
Meeting the
Requirements of the Electromagnetic Compatibility (EMC)
Directive on page 104, these cables are designed to aid the user in gaining
Europ
ean Compliance, and are thus an integral part of a CE system solution.
EMC cables add RF screening and bonding to reduce emissions, increase
immunity, and provide high integrity safety Earth bonding. They also help to
reduce problems in high electrical noise environments.
Non-EMC Cables
Parker also offers non-EMC cables, for applications where CE compliance is
not required, and where ambient electrical noise does not cause problems.
Because these cables are either unshielded, or contain simple foil shielding
terminated by a drain wire, they do not provide significant shielding of
electrical noise at high frequencies.
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