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MAIN/AUXILIARY AC POWER
Figure 35
Motor/Amplifier Auxiliary Wiring
An external AC voltage of 220 VAC single phase can be connected to the AUX AX power input
to the appropriate terminals (L1, L2 and GND). The main/auxiliary switch can be switched to
the AUX position. Power for the logic supplies that power the computer is now separated from
the high power circuits that create the motor +BUS voltage. The high current and voltage can
now be removed from the three phase L1/L2/L3 and GND terminals, thus eliminating the DC
BUS supply voltage source for the motor. Under these conditions, the position feedback from
the resolver is in tact, yet high power voltage and current sources for R, S & T are removed.
Motor power reduces to nothing as the BUS capacitors discharge after AC power is removed
from the “MAIN AC POWER” input. An un-interruptible power supply of 220 VAC at 1 amp is
adequate for power to the auxiliary input.
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