Accessories (overview) – Lenze 9400 Manual User Manual
Page 381
Accessories (overview)
Communication modules
PROFIBUS
9
381
EDS94SPP101 EN 7.1
Specification of the transmission cable
Please follow the specifications of the PROFIBUS user organisation (PNO) for signal cables:
Area
Values
Specific 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
Double twisted, insulated and shielded
Baud rate / length of bus cable
Baud rate [kbps]
Length [m]
9.6 ... 93.75
1200
187.5
1000
500
400
1500
200
3000 ... 12000
100
Tip!
For high baud rates we recommend to consider the application of optical
fibres.
Advantages of optical fibres:
ƒ
Electromagnetic interferences on the transmission path remain ineffective.
ƒ
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.