LEUs are concentrated into cabinets within the station interlockings and
along the line.
Each LEUs can command up to 4 balises. Each Encoder cabinet can house up to
8 LEUs. The maximum distance between balises is 5 km. Connection to Computer
Based Interlockings is either through a safety protocol stack based on
“Profibus” or HDLC proprietary serial link.
The connection to all-relay interlockings takes place through voltage free
relay contacts. Remote diagnostic is also available.
