[williamsmotower]

I have a Heidenhain ROD 426B rotary encoder

Pages 50 and 51 of this link show wiring diagram
http://www.heidenhain.com/fileadmin/...349_529-29.pdf

This encoder in incremental and is to be used for a camshaft test stand.

The wiring the company that made the circuit board wants me to wire it as follows (I included the color of wires I wired it as from my deciphering of the Heidenhain wiring)

DB9 male plug:
pin:
1 VCC 5 volts (i used blue wire)
2 quadrature A (i used brown wire)
3 quadrature B (i used green wire, and tried gray wire)
4 reference (i used red wire)
5 ground (i used the shielding sheath of the encoder wiring bundle)

When I turn encoder by hand it's not registering.

Thank you for looking at this, and help would be appreciated! Jesse

[williamsmotower]

Another bit of info. I took casing off encoder to see if I could see the light that shines on the encoding wheel.

If this is powered on should I be able to see this light at all.. or should it be to faint to see?

[Al_The_Man]

It appears White/grn = 0v, Brown/Grn =5v, Brown=A Gray=B, Red=Z.
You won't see any light, they are infra-red, you should see 5vTTL unless it is the low level sine wave version.
Al.

[williamsmotower]

I got a bite! Thanks Al!

But.... I'm still confused.

Here is the wires I have coming off encoder...

blue
brown small gauge
brown bigger gauge
gray
red
green
pink
yellow
violet
white small gauge
white bigger gauge
black

since I have no brown/green (this means a brown wire with green markings to me... does that mean I use the brown and green wire on the same terminal?

Or at the risk of getting flamed for not figuring this out myself... with the info provided above could you tell me how to wire this correctly and fill in the blanks for this?

DB9 male plug:
pin:
1 VCC 5 volts ________
2 quadrature A _________
3 quadrature B ________
4 reference _______
5 ground _________

[Al_The_Man]

Well I have most of the Heidenhain pinout colour and I cannot find that particular combination?
The ROD426 TTL encoder I have shows.
Blue =sensor power +5v
White =sensor 0v
White/Grn =Power common (0v)
Brown/Green =+5v supply
brown = A
green = /A
gray =B
pink =/B
red =Z
black =/Z
Yellow =N/C
Do not use the shield as common.
Al.