This document explains the wiring required when extending the 4 Wire LAN beyond 300 metres.
Depending on your requirements you may need to use LAN Isolation Modules (CM797B)
You may also need to use BELDEN 8723 Shielded cable to extend the 4 wire LAN out to a possible 1200m total LAN length.
You will need to think about usin LAN ISOLATION and LAN TERMINATION practices explained in this Tech Note.
Refer also to WIRING in the Installation Manual for the Solution 6000