Help with stepper motor wires

[gogo2520]

Hello I have a unipolar stepper motor
        Part # PM35S-048-HPE8
        Made by NMB
    Its a small motor , runs off 12 volts.  I am just trying to understand the wires.
    Theres 5 wires coming out of the motor
      colors are like this  Yellow  Brown  Black  Green  Red.  In that order.
I am thinking the black is the common. that was easy, and the yellow and brown     
are for one winding andth the other two, Green Red are for the other. But what I don't know is which ones are for the center tap. Anyone seen something like this
                          Thanks gogo         

 

[hotwaterwizard2]

Here is the best I could do!

Website
http://www.nmbtech.com/index_f.html

Datasheet
http://www.eminebea.com/content/html/en/motor_list/pm_motor/pdf/pm35s048.pdf

Wiring Info
http://www.sherline.com/8760pg.htm

PM35S-048-HPE8
  Made by NMB
unipolar stepper motor

Another Datasheet
http://www.nmb-gmbh.de/download_files/schrittmotoren.pdf

Stepper motor Information
http://www.clickautomation.com/PDF/categories/Step%20Motor%20Engineer%20(2002%20Catlog).pdf
http://www.cs.uiowa.edu/~jones/step/types.html
http://www.southwest.com.au/~jfuller/steppers.html
http://www.ams2000.com/pdf/step101.pdf
http://www.bbastrodesigns.com/cot/operate_stepper_windings.html
http://eio.com/jasstep.htm

 

[gogo2520]

Wow thats a lot. When I did a search on google I just cam up with two hits and they were know help.  Thank you.
                                    gogo

 

[Ryan Parks]

Impressive!!!