ABB AC 800F

4 Cabling the AC 800F
4-14
4.2.4 100BaseT or FF/HSE (Full Ethernet)
Contrary to other fieldbus systems the 100BaseT or FF/HSE networks have a star
topology instead of a bus topology. Twisted-pair cables are used for data
transmission.
Topology star topology, connection via hubs or
star couplers or Ethernet switches
Transmission medium UTP CAT 5 with RJ45 connector
STP CAT 5 with RJ45 connector
Transmission base band, 10 Mbit/s
Max. segment length 100 m
Max. number of nodes per segment 2
Max. number of nodes per network 1024
Minimum spacing between two nodes 2.5 m
Connection of nodes 2 nodes linked directly via cross cable
more than 2 nodes connected via hubs
or switches and uncrossed cables
Coupling of segments via repeaters possible, see Section 4.2.12
Applications:
• Networks within one building
• Medium size installations
• Networks with medium or large number of nodes
• Installations with little or medium EMI