P5 Wiring

[tintruder]

I have seen several different wiring diagrams for the P5 motors, but now as I sit with mine in front of me, I'm trying to confirm what each is for.

What I have are two cables.

The forward one has 6 leads:
Red Motor Phase U
White Motor Phase V
Black Motor Phase W
Green/Yellow Ground
and
2 thinner Yellow wires BRAKE (confirmed by applying power...15VDC was able to release the brake)

The encoder cable has 15 leads:

blue/black U out (CS)
brown/black u out (CS)
green/black V out (CS)
purple/black v out (CS)
red/black W out (CS)
yellow/black w out (CS)
blue A out (EN)
brown a out (EN)
green B out (EN)
purple b out (EN)
white C out (EN)
yellow c out (EN)
red DC +5v
black GND
and a heavy silver braid CASE GND

The above wire mapping is from a .pdf file that contains a company drawing of the motors (except for the pair of yellow brake wires which are not shown in the drawing)

I'm guessing that (EN) means "Encoder", but what is (CS)?

And if this thing is supplying quadrature encoded signaling, why so many wires? I expected just four; ( - , A, B, + ) What do all of these wires provide?

Guess I have a lot to learn!

Tom

[Al_The_Man]

CS Commutation signal
The A & a etc are the quadrature signals and their complement (180° opposite) because they are differential encoders, this offers noise protection over long distance encoder run.
Al.

[KTP]

"why so many wires? I expected just four; ( - , A, B, + ) "

What Al said, with the additional note that you do not need to use the complement signals on the halls (CS wires). For example, with a BDC25 brushless drive, I have connected the blue/black wire to Hall A input on the amp, the green/black wire to Hall B, and the red/black wire to Hall C. I left the brown/black, purple/black and yellow/black unnconnected.

On the motor power leads, sometimes they are called A,B,C, sometimes they are called R,S,T and sometimes U,V,W. Nice that they have a standard

On the BDC25, I connected red to Motor R, white to Motor S, and black to Motor T. I connected the green/yellow to earth ground.

The only other wires you need to connect on the encoder cable are black(gnd), red (+5V), blue (encoder A) and green (encoder B). You may also have a drive that uses differential encoder signals, so you would also use brown for encoder A-bar (that should be a bar over the A), and purple for encoder B-bar.

I was quite pleased that the wiring worked correctly the first time. Sometimes on poorly documented motors, you have to swap phases around to get the motor commutating properly. (this will be quite obvious )