These drives will need a +- 10V signal to work.
See page 59 of manual the INHIBIT will have to set"
Inhibit Input Check inhibit input for correct polarity (that is, pull-to-ground to inhibit or pull-to ground
to enable). Inhibit configuration depends either on the DIP switch settings or a 0 ohm
SMT resistor marked on the board. Also, keep in mind that noise on the inhibit line could be a
cause for a false inhibit signal being given to the drive."
Hope this helps,
Iron-Man