Hi Joseph, The 40 & 40Bs are hardware interchangeable, but your hopes may be dashed re: no re-committal. B0400SD details the procedure --- that should provide all the info you need about CP40 to CP40B conversion. Regards, Barry Heap > Are they interchangeable, same > hardware connections, no re-commit? > Hoping this is something we can do on our own without an outage if there are > no hardware compatibility issues and a recommit is not required. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave