Lenze E84DGFCp Series User Manual

EDS84DMOTPBUS EN 3.0 - 11/2011 L 25
Communication manual 8400 motec PROFIBUS
Installation
Electrical installation
5.2.3 Bus cable specification
Bus cable length
The bus cable length depends on the baud rate used:
 Tip!
For high baud rates, we recommend taking the use of optical fibres into
consideration.
Advantages of optical fibres:
• External electromagnetic interferences have no effect on the transmission
path.
• Bus lengths of several kilometres are also possible with higher baud rates.
The bus length is ...
– independent of the baud rate;
– dependent on the optical fibre used.
 Note!
Only use cables that correspond to the given specifications of the PROFIBUS user
organisation.
Area Values
Cable resistance 135 ... 165 Ω/km, (f = 3 ... 20 MHz)
Capacitance per unit length ≤ 30 nF/km
Loop resistance < 110 Ω/km
Core diameter > 0.64 mm
Core cross-section > 0.34 mm
2
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 of the data volume, cycle time and number of stations
should only be selected as high as required for the application.

Lenze E84DGFCp Series Specifications

General

Brand	Lenze
Model	E84DGFCp Series
Category	Conference System
Language	English