Goodrive300
inverters Appendix A
263
Repeater
Up to 32 stations can be connected to each segment (master station or subsidiary stations),
the repeater have to be used when stations is more than 32. The repeaters in series are
generally no more than 3.
Note:
There is no repeater station address.
A.2.6.4 Transmission rate and maximum distance
Maximum length of cable depends on the transmission rate. The Table below shows the
relationship between transmission rate and distance.
Transmission rate (kbps)
A-wire (m)
B-wire (m)
9.6
1200
1200
19.2
1200
1200
93.75
1200
1200
187.5
1000
600
500
400
200
1500
200
-----
12000
100
-----
Transmission line parameters:
Transmission rate (kbps)
A-wire (m)
B-wire (m)
Impedance (Ω)
135~165
100~130
Capacitance per unit length(pF/m)
< 30
< 60
Loop Resistance (Ω/km)
110
--------
Core wire diameter (mm)
0.64
> 0.53
Line-core cross-section (mm
2
)
> 0.34
> 0.22
Besides shielding twisted-pair copper wires, PROFIBUS can also use optical fiber for
transmission in an electromagnetic interference environment to increase the high-speed
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