Endress+Hauser Proline 200 PROFIBUS PA, Краткое руководство по эксплуатации

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Proline 200 PROFIBUS PA Electrical connection
Hauser 13
5.1.3 Fieldbus cable specification
Cable type
In accordance with IEC 61158-2 (MBP), cable type A is recommended. Cable type A has a
cable shielding that guarantees adequate protection from electromagnetic interference and
thus the most reliable data transfer.
The electrical data of the fieldbus cable have not been specified. but determine important
characteristics of the design of the fieldbus, such as distances bridged, number of users,
electromagnetic compatibility, etc.
Cable type A
Cable structure Twisted, shielded twin-core cable
Wire cross-section
0.8 mm 2 (AWG 18)
Loop resistance (direct
current) 44 Ω/km
Characteristic impedance at
31.25 kHz 100 Ω ±20%
Attenuation constant at 39.0
kHz 3 dB/km
Capacitive asymmetry 2 nF/km
Envelope delay distortion
(7.9 to 39 kHz) 1.7 ms/km
Shield coverage 90 %
The following cable types are suitable for non-hazardous areas, for example:
• Siemens 6XV1 830-5BH10
• Belden 3076F
• Kerpen CEL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL
Maximum overall cable length
The maximum network expansion depends on the type of protection and the cable
specifications. The overall cable length comprises the length of the main cable and the length
of all spurs >1 m (3.28 ft).
The maximum overall cable length for cable type A: 1
900 m (6 200 ft)
If repeaters are used, the maximum permitted overall cable length is doubled. A maximum of
three repeaters are permitted between the user and master.