FD67 Profibus-DP Manual
5
3 Configuration
information
This chapter contains indications and information required for successful installation of your system in a
Profibus-DP network. General field bus information relevant to configuration, installation and operation of
FD67 systems can be found in the following manuals :
FD67 – System manual
FD67 – Technical manual
3.1 FD67 in a Profibus-DP network
FD67 is a modular I/O system designed for decentralized gathering and processing of digital and
analogue process variables. It is made up of a field bus specific bus node and field bus-oriented I/O
modules, which are connected to the bus node via internal system connection.
3.1.1 System components
Min. configuration of a Profibus-DP network :
-
one or several bus masters.
-
one or several slaves.
-
Profibus cables and plugs to interconnect the system units.
-
one ore several bus segments linked up by repeaters.
3.1.1.1 Profibus cables
Use only A-type cables, according to EN 50 170 part 8-2. Type B cables are obsolete and should
basically not be used.
Parameter
A-type cable
Impedance level /
Ω
135 to 165 at a frequency of 3 to 20 MHz
Operating capacity (pF/m)
≤
30
Loop resistance (
Ω
/km)
≤
110
Wire diameter (mm)
> 0,64
Wire cross section (mm
2
)
> 0,34
The wire cross section used must fit the connection possibilities on the bus connector.