Check out
The best way to buy industrial controls--low prices, fast shipping and superior service. They have
VFD's and
PLC's. You can
wire limit switches up to a
VFD, it just may take a little creative wiring, but it can definately be done. One thing to remember is do not use the control wiring directly off of the
VFD, to run through the limit switches. You risk burning up the
VFD by sending some funky
voltage. (I had a
VFD rep from Omeron warn me about this) What i ended up doing was running a 24V through the limit switches (in my case is was limit switches and emergency stop buttons) where you would flip a
switch to on and if all limits were closed ( i had everything wired up normally closed) the
switch along with all of its limits would energize the coil on a 24V
relay. I had the
VFD programmed and wired so that when its signal out (24V on this particular
VFD) would then run through the
relay's NO contact and to the common of my Forward/Stop/Reverse
switch. The forward and reverse were wired to the appropriate contact on the
VFD. If you would like a schematic i can
send you one. This design worked very well. I now use ABB VFDs from automation direct for a much lower price than i have been able to find anywhere else.
Also, 220 2
phase power is no longer around mostly. You would either have 220 single
phase (2 hot legs) or 220 3
phase. I have never needed a
VFD for a single
phase motor before so i have never looked for one. All of my projects deal with 480 3
phase.