IMPULSE®•G+/VG+ Series 4 24 V Power Supply Installation Manual - November 2011
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6. Verifying Operation
After properly wiring and installing the option, use the following procedure to check for normal
operation:
1. Make sure the drive main circuit power is on, 24 VDC external power is supplied to the 24 V
connector plug, and the 24 V connector plug is connected to the option.
2. Switch off the main power supply to the drive. The 24 VDC external power supply should provide
power to the drive control unit.
3. Check for the red LED on the option indicating proper option operation.
4. The digital operator on the drive will display “Uv” for about 10 seconds to indicate an
undervoltage condition on the drive. If “Uv” does not flash on the display screen, check the
wiring. If “Uv” fails to appear on the digital operator after confirming proper wiring, the drive or
option may be damaged.
Power Supply and the Control Circuit
Table 7 outlines the various conditions under which the option provides power to the control circuit.
Table 7: Power Supply and Control Circuit
Drive Main Circuit Input
Power Supply
Power from 24 V Power
Supply Option
Control Circuit
Operation in Drive
Drive Operation
ON
ON
Normal Operation
Possible
ON
OFF
Possible
OFF
ON
Not Possible
OFF
OFF
Stop
Not Possible
