uc300eth vfd connectios

[JAZZCNC]

Ok well, I've never used this BOB before so I could be wrong but I've had a quick look and I don't think you can take the Analog Outputs from the Uc300 through this BOB. It doesn't have a 16 pin Analog connector.? This means you cannot control the Speed from this BOB. You could take it directly from the Uc300 Analog connector but that's not advised as they are not Isolated.
I'm not into electronics and don't know if it's possible to use the Outputs on the UCBB for analog but you'd still need to hack the DB26 cable and plug into the DB16 Analog connector on the UC300. I would email them and ask before going further.

Regards the Start/Stop and Forward/Reverse then you can connect directly to the Outputs on the BOB but this will mean Tieing the DCM (common Gnd) on the VFD to the 24V PSU Gnd.
Personally I don't like doing this because if anything happens to VFD or Vise reverse the BOB they can feed back into each other and do damage.
I would use relays to control the VFD On/Off and just use the outputs to turn these relays on/off. Because the UCBB doesn't provide relays then you will need external relays with diodes, one for each direction.

Sorry, I can't help much more than that. It's a very basic BOB.

Also, note that you will only need to use 4 of those wires on the VFD. The Red wire doesn't need to be used with the Uc300, all it was doing was supplying the 10V speed ref voltage to the old controller. The Uc300 generates it's own 10V Ref voltage.