ABB FDNA-01 Bedienungsanleitung PDF herunterladen (Seite 13)

Overview

This chapter contains a short description of the DeviceNet

standard and the FDNA-01 Adapter module, and a delivery

checklist.

DeviceNet standard

The DeviceNet network has a linear bus topology. Terminating

resistors are required on each end of the trunk line. Drop lines as

long as 6 metres (20 feet) each are permitted, allowing one or

more nodes to be attached. DeviceNet allows branching

structures only on drop lines. An example of an allowable topology

is shown in Figure 1.

Figure 1. DeviceNet bus topology

The maximum length of trunk cable depends on the data rate and

on the type of the cable used (see chapter "Technical data").

Node

Tap

TapTap

Node

Terminating

Resistor

Node

Trunk line

Drop line

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ABB FDNA-01 Bedienungsanleitung Seite 13