Aritech ATS4000 Manual de Serviço descarregar pdf (Página 42)

42 ATS Designers Guide

ATS1743

. . . .

ATS1743

. . . .

ATS1743

. . . .

ATS1743

Drawing 3-12 Star configuration using ATS1743 modules.

3.1.3.4 Other bus configurations

• RS485 Loop

In the case of a risk of system bus severance, an ATS1742 loop interface can be used.

The device provides bus cut signalling, and sustains communications with both bus

branches after bus cut. The loop interface also has an amplifier, so the length of the loop

is not dependant on the connection topology. Unfortunately extending the loop using the

methods described in paragraph Increasing the system bus range is impossible.

Therefore the maximum loop length is 1500m. Nevertheless all limitations mentioned

there are valid.

ATS1742

L = 1500m

ATS1740

L = 1500m

Drawing 3-13 System bus loop configuration.

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Aritech ATS4000 Manual de Serviço Página 42