Pavone Systems DAT11 Technical Manual page 13

PROFIBUS DP CONNECTION
Pin Signal
1 -
2 -
3 B line
4 RTS
5 GND
6 + 5V Bus Output +5V termination (isolated)
7 -
8 A line
9 -
Housing Cable shield
For connection to the Profibus Master, use a standard Profibus cable.
The typical impedance of the cable should be between 100 and
130 Ohms (f> 100 kHz). The cable capacity (measured between
conductor and conductor) should be less than 60 pF / m and the
minimum cable cross section should not be less than 0.22 mm
In a Profibus-DP network, you can use either cable type A to type B
cable, depending on the required performance. The following table
summarizes the features of the cable to be used:
Specification Type A Cable
Impedance from 135 to 165 ohm
(f = 3 – 20 MHz)
Capacity < 30 pF/m
Resistance < 110 ohm/km
Conductor cross > 0,34 mm
section
The following table shows the maximum length of the wires line with
cable type A and type B, function of the different communication
speed required:
Baud rate
9.6 19.2
(kbit/s)
Cable A
1200 1200 1000
lenght (m)
Cable B lenght
1200 1200
(m)
For a reliable operation of the Fieldbus, should be used a line ter-
mination at both ends.
In the case of multiple DAT 11 instruments, use the line termination
at only one instrument.
For configuring the instrument, the GSD file is available (hms_1810.
gsd) that must be installed in the master.
Description
-
-
+RxD/+TxD, level RS485
Request to send
Ground (isolated)
-
-RxD/-TxD, level RS485
-
Internally connected to protective
earth according to Profibus
specification
Type B Cable
from 100 to 300 ohm
(f > 100 kHz)
< 60 pF/m
-
> 0,22 mm
2
187.5 500 1500 3000
400 200 100
600 200 -
2
2
6000 12000
100 100
- - -
6 9
1 5
Page 11