Wiring; Bus Line; Cable Lengths - ABB Advant AC500 Manual

Wiring

Bus line

Type
Characteristic impedance
Cable capacitance
Diameter of the cores (copper)
Conductor cross section of the cores
Wire resistance per core
Loop resistance (resistance of two cores)

Cable lengths

Within one segment, the maximum possible cable length of a PROFIBUS subnet depends on the
transmission speed.
Baud rate
9.6 kbaud to 187.5 kbaud
500 kbaud
1.5 Mbaud
3 Mbaud to 12 Mbaud
Table: Maximum cable length of a segment within a PROFIBUS subnet
The cable ends of the bus segments must be equipped with terminating resistors according to the
following drawing. The terminating resistors are commonly integrated into the bus connectors.
VP (+5 V)
Data line B RxD/TxD-P
Data line A RxD/TxD-N
GND (0 V)
Figure: Configuration of the terminating resistors
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V2
AC500 Hardware
390 Ohms
220 Ohms
390 Ohms
1-49
twisted wires (2 cores, shielded)
135...165 Ω
< 30 pF/m
≥ 0.64 mm
≥ 0.34 mm²
≤ 55 Ω /km
≤ 110 Ω /km
Max. cable length
1000 m
400 m
200 m
100 m
System data
AC500 / Issued: 05.2007