Configure Open Collector output

[LucSoret]

Hi,

I want to use my USB 6002 as Open Collector ouput.
So I decided to follow this tutoriel : http://digital.ni.com/public.nsf/allkb/10056451DBB55A3A86256C61007117B1

However, I can't set an input to the channel property node, but only output (see the following picture)

Have you any idea of how I can configure the property node input?

Thank you in advance ! 

[dkfire]

Right-click on the propertynode and select Change to Write.