Technical information

17
Installation
* In order to comply with UL listing you must incorporate fuse protection for the incoming AC power
with the minimum rating shown here. The AIC (Amperes Interrupting Capacity) rating is 5000 amps
minimum for all FX drives.
† On power-up, the logic power supply has an inrush current that is typically 25 Amp peak at 100
VAC and 50 Amp peak at 200 VAC. This peak current is typically present only during the first one
or two cycles of AC power. You must consider this inrush current when you choose the AC power
fusing.
Power Line Requirements
FX-208 through FX-6120
The FX-208 through FX-455 are designed to operate on a 50/60 Hz, single phase AC power
line. The FX-490, 4120 and FX-6120 are designed to operate on a 50/60 Hz, three phase
power line. The AC voltage of this power line must be within 90-264 VAC and be free of
voltage transients which exceed this range. If the AC power does not meet these
specifications, AC line conditioning is required.
Insufficient or incorrectly applied AC line power is a major cause of application problems.
Wire sizing and transformer selection should be done carefully. The bridge AC current
requirements will vary greatly depending on the amplifier model, type of application and the
load requirements. A more detailed explanation is given in “Transformer Sizing” on page 22.
Also, See “Wire Sizing” on page 25. which shows the typical line ampacities and wire gauges
for AC power.
The FX-208 through FX-455 bridge circuit breaker is mounted on the bottom of the amplifier.
This bridge circuit breaker can be used to perform maintenance. If the bridge circuit breaker
or fuse is open or bus power has been interrupted, the drive will display a “6”. A “6” fault can
also be caused by a low AC line voltage. The drive must be manually reset after restoring
power. If logic power is maintained while bridge power is off, position information remains
Drive Model
External AC Line Input
Fusing Sizes
External Logic Fusing
Sizes
Recommended Minimum
AC Line Input Wire Gauge
FX-208* 15 AMP 5 AMP† 16 AWG
FX-316* 15 AMP 5 AMP† 16 AWG
FX-340* 15 AMP 5 AMP† 14 AWG
FX-455* 15 AMP 5 AMP† 14 AWG
FX-490* 20 AMP 5 AMP† 14 AWG
FX-4120* 20 AMP 5 AMP† 12 AWG
FX-6120* 20 AMP 5 AMP† 12 AWG
FX-6200 20 AMP 5 AMP† 12 AWG
FX-6300 30 AMP 5 AMP† 10 AWG
FX-8200 20 AMP 5 AMP† 12 AWG
FX-8300 30 AMP 5 AMP† 10 AWG
FX-8400 40 AMP 5 AMP† 8 AWG