Profibus Dpv1; Bus Termination; Cables - ABB Sensyflow FMT500-IG Instrucciónes De Puesta En Marcha

5.3

PROFIBUS DPV1

5.3.1

Bus termination

To minimize line reflection phenomena and ensure a defined quiescent level on the
transmission line, the following terminating resistor combination should be used for the
connections at both ends.
Fig. 19
The numbers in brackets correspond to the assignment on the 9-pin SUB-D connector. You can
also use the 3 jumpers for bus termination purposes. Keep in mind, however, that the bus
termination will be deactivated in the event of a device failure.
Bus termination:
As the factory default, the jumpers are connected to only one contact. To establish the bus
termination, all 3 jumpers must be connected to their adjacent contacts.
5.3.2

Cables

The cables for the PROFIBUS connection must meet the following parameters in accordance
with PROFIBUS specification EN 50170 part 8-2:
Parameter
Surge impedance in
Effective capacitance (pF / m)
Loop resistance ( / km)
Solid conductor
Flexible conductor
Important (Notice)
To ensure reliable operation / minimize line reflection phenomena and to benefit from a
defined quiescent level, the PROFIBUS network must be terminated (see Section 5.3.1, "Bus
termination").
Spur lines should be avoided, as they can result in line reflection phenomena and
malfunctions.
Important (Notice)
To ensure reliable PROFIBUS communication, the PROFIBUS DP / FMS technical /
configuration guideline must be observed.
CI/FMT500-IG-X1
VP (6)
B line (3)
A line (8)
DGND (5)
DP, cable type A, shielded
135 ... 165 at a frequency of 3 ... 20 MHz
30
≤ 110
AWG 22/1
> 0.32 mm
Sensyflow FMT500-IG
Electrical connections
390 Ω
220 Ω
390 Ω
G00868
2
EN - 33