so can this board be used to run the VFD from mach3 and the rs485?
 http://www.goodluckbuy.com/2-ports-pci-express-serial-multi-i-o-controller-card-pio9865-2s-.html
Features:
- Full compliant with PCI express base specification, renision 1.0a
 - PCIe multi function peripheral controller with x1 lane interface
 - Support for D1,D2,D3hot and D3cold
 - Support PCIe power management

Serial Port:
- 16c450/550/extended 550 compatible UARTs
 - Supports RS232, RS485&RS422 modes
 - Bi-directional speed from 50 bps to 16Mbps/port
 - Full serial modem control
 - Supports hardware, software flow control
 - 5,6,7.8 and 9-bit serial format support
 - Custom BAUD rates supported with external clock or by programming internal PLL
 - On chip 256 byte depth FIFOs in transmit. Receive path of each serial port
 - Supports remote wakeup and power management features
 - Serial port transceiver shutdown support
 - Support slow IrDA on all serial ports


some how I would have to find the  2 pins (RS+RS-) that the VFD wants to run off?

some info I found
http://digital.ni.com/public.nsf/allkb/5FFDF323C35C1B5386256F1C00622596

nice! I found a picture of the db9 and wired the I/O board to VFD like it shows and now I have the plug in working. now I just have to get my settings right I think.

this is with mach 3 turn and a  Huanyang VFD. plug in below....
http://royaumedeole.fr/wp-content/uploads/2013/02/vfdPlugin1.5.1.zip#2 is the rs- and the #3 is the rs+ on the vfd. this is with the cables plugged in just like the pics above. they are NOT 1 way only plugs.