ABB AC 800F

4 Cabling the AC 800F
4-52
The following table shows this calculation.
No. Cable of length or component Cable length
1 10Base2 cable, length 10 m 10 m
2 10Base2 cable, length 15 m 15 m
3 10Base2 cable, length 50 m 50 m
4 10Base5 concentrator module 10 m
5 10BaseFL concentrator module 30 m
6 10BaseFL cable, length 100 m 100 m
7 10BaseFL transceiver 30 m
8 AUI cable, length 10 m 10 m
Sum of all cable lengths and propagation time equivalents 255 m
Hence the above-described network setup meets the requirement:
Maximum network length ≤
≤≤
≤ 4800 m
When designing a network observe the following rules:
• Maximum distance between two 10BaseFL modules: 4000 m
• Maximum distance between 10BaseFL module and 10BaseFL transceiver: 2000m
• Connecting more than 5 network concentrators in series requires so-called re-
timing boards
• When using unshielded twisted-pair (UTP) cables, the length of the UTP segment
has to be increased by 10 % for calculation.