Wiring a Chinese servo to a 7i77. Setup for yet another newbie

i read your drive pdf your drive cn2 cabale out the A , B and Z plus out puts.
are u wire tease plus output to 7i77?

Not quite sure what you mean. Yes I have the A B and Z outputs wires into the 7i77.

I'm trying to hook up the encoder to the acorn and what I don't know is where to hook the 5+VDC from the acorn encoder plug into the servo driver. what I do know is that on page 2.3.2 of the manual A+ is pin 20 A- is pin 19 B+ is pin 19 B- is pin 17 Z+ is pin 15 Z- is pin 16 GND is pin 1 and the only remaining pin is pin 22 and that is called OZ (Z open collector output) so I would thing that since that pin 22 is the only remaining pin; that it must be the 5+VDC for the encoder?????? oh man its always the last bolt you un-tighten that breaks off LOL on the acorn encoder plug it has pin 9=+5VDC pin7=A+ pin 8=B+ pin5=B- pin 6=Z+ pin 3=Z- pin 2=COM so it seems all so clear that A+ A- B+ B- Z+ Z- GND (COM) all have their places to connect to, but it's that 5+VDC pin 9 on the acorn that I dont know where to plug it in on the db25 connector on the servo driver, do you know if it plugs into the pin 22 OZ (Z open collector) please help, I am going crazy LOL
 

The 5V is to power a standalone encoder.

If the servo has a simulated encoder output it does not need
5V so the 5V pin on the Acorn would be left unconnected