Hello engmoh,
The maximum current for the digital output channels on the 6229 can be found in the following KnowledgeBase article:
http://digital.ni.com/public.nsf/websearch/383AE78B7744B3E686256F26005B3F42?OpenDocument
The information in that article can be found in the M Series Help which can be found here:
http://digital.ni.com/manuals.nsf/websearch/9477D6DF1FE5A72986256FAB00633DE4?opendocument
I hope this helps!
E.Lee
Eric
DE For Life!