Hi! All Wanted to know how long can i run a field bus using the optical cable. The issue is that the present system is at location 0, and there is another unit around 1.5 kms away. I was thinking of putting the CP's at location 0 & using a optical field bus to connect to FBI's around 1.5 kms away. The 1.5 could be 2.5 also. Or should i create a extended node and connect the same using NCNI's through a optical link. In the present system i've four 1 X 8 MS, and i'll have to add two 1 X 8 MS at the new location. It would be good to know if there are issues involved with any of the above configurations. The system is 6.1.2 Unix having 51B stations. TIA & Regards Ajay Tathgir Reliance Industries Limited Mumbai - India _______________________________________________________________________ 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