ABB AC 800F

4 Cabling the AC 800F
4-11
4.2.1 10Base2 (Cheapernet, Thin Ethernet)
Topology bus topology, branches with
transceivers and AUI cables
Transmission medium
coaxial cable 50 Ω,
two 50 Ω terminating resistors
Transmission base band, data rate 10 MBit/s
Maximum segment length 185 m
Maximum number of nodes per segment 30
Maximum number of nodes per network 1024
Minimum spacing between two nodes 0.5 m
Connection of nodes via 10Base2 F-connectors
Coupling of segments via repeaters possible, see Section 4.2.12
Applications
• Networks within one building
• Small installations
• Networks with few nodes
• Installations with low EMI and low potential differences
• Installations powered by the same low-voltage source