Control Techniques AXIMA 2000 Installation Manual page 28

AXIMA® 2000/4000 Multi-Axis Controller Installation Manual
Grounded Supply Requirement
A significant AC power problem occurs when the secondary of the AC distribution
transformer is not electrically referenced to earth ground (i.e., left floating). In this case, the
voltages that develop between the AC power lines and earth ground can continuously exceed
the voltage limit of 264 VAC. When this happens the protection circuit in the AXIMA 2000/
4000 controller will try to suppress this excess voltage. If the condition is prolonged, the
AXIMA 2000/4000 controller protection circuits will fail.
The voltage limit of 264 VAC applies from L1 to PE and L2 to PE as well as from L1 to L2.
Use a ground referenced AC supply.
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