Profibus Cable - Vacon OPTC3 User Manual

technical data
2.2

Profibus cable

Profibus devices are connected in a bus structure. Up to 32 stations (master or slaves) can be con-
nected in one segment. The bus is terminated by an active bus terminator at the beginning and end of
each segment (see Figure 2-1 ). To ensure error-free operation, both bus terminations must always be
powered. When more than 32 stations are used, repeaters (line amplifiers) must be used to connect
the individual bus segments.
The maximum cable length depends on the transmission speed and cable type (see
specified cable length can be increased using the repeaters. The use of more than 3 repeaters in se-
ries is not recommended.
Parameter
Impedance
Capacity
Resistance
Wire gauge
Conductor area
Table 2-2. Line parameters
Baud rate
(kbit/s)
Length line A (m) 1200
Length line B
(m)
Table 2-3. Line length for different transmission speeds
E.g. following cables can be used:
Belden Profibus Data Cable
Olflex Profibus Cable
Siemens SINEC L2 LAN cable for Profibus
NOTE!
1. Minimum distance between power and bus cables is 30cm.
2. Minimum cable length between two stations of 1m is recommended.
24-hour support +358 (0)40 8371 150 • Email: vacon@vacon.com
Line A Line B
135 ... 165 Ω 100 ... 130 Ω
(3 to 20 Mhz) ( f > 100kHz)
< 30 pF/m < 60 pF/m
< 110 Ω / km -
> 0,53 mm
> 0,64 mm
> 0,22 mm
> 0,34 mm 2
9.6 19.2 93.75
1200 1200
1200 1200 1200
2
187.5 500 1500
1000 400 200
600 200 -
3079A
21702xx
6XV1 830-0AH10
vacon • 5
Table 2-3
). The
3000-
12000
100
-
2