in reply to: FF-890, 891 documents posted by Shibi on 03 October 2007 at 09:22:08.
I imagine the best source for these is the Fieldbus Foundation. Try emailing them. I notice these specs are also available in Europe from French bookseller Lavoisier at www.lavoisier.fr/notice/gbBBRKOOSPX3POOX.html for around 700 euros.