Lenze PROFIBUS Controller-based Automation Manual do Utilizador descarregar pdf (Página 24)

5Technical data

5.2 Bus cable specification

Lenze · Controller-based Automation · PROFIBUS® Communication Manual · DMS 4.3 EN · 04/2014 · TD17

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

5.2 Bus cable specification

PROFIBUS cables with an integrated bus terminating resistor can be obtained from various cable

manufacturers.

Bus cable length

The length of the bus cable depends on the baud rate used:

 Note!

Only use cables that comply with the specifications of the PROFIBUS user organisation.

Area Values

Cable resistance 135 ... 165 /km, (f = 3 ... 20 MHz)

Capacitance per unit length  30 nF/km

Loop resistance < 110 /km

Core diameter > 0.64 mm

Core cross-section > 0.34 mm

Cores Twisted in pairs, insulated and shielded

Baud rate Length

9.6 ... 93.75 kbps 1200 m

187.5 kbps 1000 m

500 kbps 400 m

1500 kbps 200 m

3000 ... 12000 kbps 100 m

 Note!

The baud rate depending on the data volume, cycle time and number of stations should

only be selected as high as required for the application.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 54 55

Sem comentários

Lenze PROFIBUS Controller-based Automation Manual do Utilizador Página 24