485 4 wire to 2 wire connection with PCIe 8431

I am trying to connect to a watlow temperature controller with my PCIe 8431. When I wired up the cable I shorted Tx+ to Rx+ (p 4,8) and Tx- to Rx- (P5,9) to connect to the controller. I assume this is converting from 4 wire to 2 wire but, when you look at the "loop back" connections from NI this is exactly what they tell you to do. I ask since I am uncertain and I am not able to establish communication with the controller.
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Have you seen this - http://digital.ni.com/public.nsf/allkb/3EB322DAEAACB19D862571F500021C00

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This became a problem when Call Library Nodes got error terminals (and optional path terminals) in LabVIEW 8.20. I should be able to get a fix in to VI Analyzer Toolkit 2010.
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Thank You.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Gemini02
I work on behalf of HP

485 4 wire to 2 wire connection with PCIe 8431

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