ABB AC 800F

4 Cabling the AC 800F
4-55
Figure 4-32 shows a large system with repeaters and max. possible transmission
distances as an example.
Fig. 4-32 Large system with max. possible transmission distances
The following rules must be observed when using repeaters:
• The number of repeaters between two nodes is limited to four.
• Installations with more than five segments (three coax and two link segments)
require bridges.
• Repeaters for 10Base2 exist, but should not be used. Possible future expansions
can be better realized by using a 10Base5 segment without repeaters than
several 10Base2 segments with repeaters.
• When designing a new network, use as few repeaters as possible to allow future
expansions.
Fiber optic links with network concentrator are an alternative to coaxial cables with
repeaters. Modules with repeater functionality are available.