AB 1794 Flex I/O -Hardware help

Hey i haven't work with AB so much so here i need some help please,

I have a PLC 5 with DeviceNet

Now i need to setup a new nod that im going to connect 3 encoder Lenord Bauer 293 for length measurement
http://www.lenord.de/en/produkte/sensorline/inkremental/gel293/TI293_e.pdf
It´s a UN type that is on page 2 in the PDF,
TTL 10-30VDC

I wonder which card i need for this encoder type?
I have been reading the manual for 1794-IP4
http://www.literature.rockwellautomation.com/idc/groups/literature/documents/um/1794-um016_-en-p.pdf
But i cant relay understand what they mean with N & D on page 2-13,14

Shouldn't i have A, /A, B, /B inputs?
Or do i need some other card?

And i need a Flex i/o communication module with devicenet, where to find manual and ordernumber for that?

I am not familiar with the 1794-IP4, but searching the word "encoder" in your linked manual yielded one result, and I saw no mention of any method to synchronize values between channels. In other words, I am not sure it will be possible to accurately use that card with a quadrature encoder signal.

I would recommend that you look into the 1794-VHSC.

I have not used it either, but I have used a variety of other HSC modules for encoder applications so I expect it's a better fit for your device.

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1794-um010_-en-p.pdf

Thanks alot!

I have take a fast look and it looks it´s this i need, what i understand it have 2 channels.
So i need 2 of those.

So now i need to find a Flex i/o communication module with devicenet,

ason said:

So now i need to find a Flex i/o communication module with devicenet,

Click to expand...

http://ab.rockwellautomation.com/IO/1794-FLEX-IO-Communication-Interfaces

Click the resources tab, and then pick it from the wizard.

There's the:
1794-ADN

and the conformally coated
1794-ADNK

OkiePC said:

and the conformally coated
1794-ADNK

Click to expand...

OkiePC thanks for helping me.
had to read wikipedia to understand this one, but now im ready to goo
http://en.wikipedia.org/wiki/Conformal_coating

You're welcome.