ABB AC 900F Mounting And Installation Instructions Manual page 42

PROFIBUS connector and cables
Cable length
The maximum cable length of a PROFIBUS subnet within one segment depends on
the baud rate (transmission rate).
Transmission rate in kBit/s
9.6;19.2; 45.45; 93.75
187.5
500
1500
3000, 6000, 12000
Bus termination
Both bus segment ends must be provided with a termination resistor. These resistors
are usually integrated into the PROFIBUS connector. As the bus termination is
active, it must be ensured that both terminations are supplied with +5 V by a module
or an external power supply.
CM 772_Bus termination_us.png
42
Section 3 Modules
Maximum cable length
1200 m
1000 m
400 m
200 m
100 m
M&I – AC 900F Controller