Endress+Hauser PROline prosonic flow 93 Ex-Dokumentation Zu Den Betriebsanleitungen Seite 40

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Cable specifications (PROFIBUS)
Cable specifications for PROFIBUS PA
Cable construction
Core cross-section (nominal)
Loop resistance (direct current)
Impedance at 31.25 kHz
Attenuation constant at 39 kHz
Capacitive unsymmetry
Envelope delay distortion
(7.9...39 kHz)
Degree of voltage of shielding
Max. bus segment length
(incl. spur lines)
Specific inductance
Specific capacitance
Loop resistance
Max. spur length
Cable length
PROline Prosonic Flow 93 PROFIBUS DP/PA
Cable type A (reference)
twisted pair, screened
2
0.8 mm / AWG 18
44 Ω/km
100 Ω
±
20%
3 dB/km
2 nF/km
1.7 µs/km
90%
1000 m*
0.4...1.0 mH/km
80...200 nF/km
15...150 Ω/km
≤ 30 m
* For type of protection:
EEx ib IIC/IIB there are no technical safety limitations up to cable
lengths of 1900 m.
EEx ia IIC/IIB there are no technical safety limitations up to cable
lengths of 1000 m.
Cable type B
one or more twisted pairs,
common screening
2
0.32 mm / AWG 22
112 Ω/km
100 Ω
±
30%
5 dB/km
2 nF/km
–
–
1000 m*
Endress+Hauser