Profibus Pa Cable Specifications - Siemens SITRANS FUS060 Operating Instructions Manual

Table 10-9 Certificates and approvals
Certificates and approvals
Explosion protection
10.2

PROFIBUS PA cable specifications

Recommended cable types
It is recommended to use cable type A or B (cp. IEC 61158-2 (MBP)). Both types have cable
shielding that guarantees adequate protection from electromagnetic interference and thus the
most reliable data transfer. With cable type B more than one fieldbus (with the same degree of
protection) may be operated in a cable. No other circuits are permissible in the same cable.
Table 10-10
Cable structure
Wire size
Loop resistance (DC)
Impedance at 31.25 kHz
Attenuation at 39 kHz
Capacitive asymmetry
Envelope delay distortion (7.9 to
39 kHz)
Shield coverage
Max. cable length (inc. spurs >1
m)
* not specified
Siemens provides a suitable cable for non-hazardous area with following order number - 6XV1
830-5BH10
Overall cable length
The overall cable length is made up of the length of the main cable and the length of all spurs
(>1 m/3.28 ft).
The maximum network expansion depends on the type of ignition protection and the cable
specifications.
Note
If repeaters are used the maximum allowed cable length is doubled. Max. three repeaters are
permitted between user and master.
SITRANS FUS060 with PROFIBUS PA
Operating Instructions, 09/2021, A5E02225054-AD
Recommended cable types
Type A
Twisted pair, individual shield
0.8 mm
44 Ω/km
100 Ω ± 20%
3 dB/km
2 nF/km
1.7 μs/km
90%
1900 m (6233 ft)
10.2 PROFIBUS PA cable specifications
ATEX II 2G Ex db eb mb [ia Ga] IIC T6...T3 Gb
(AWG 18)
2
Technical specifications
Type B
Multiple twisted pairs, overall
shield
0.32 mm (AWG 22)
2
112 Ω/km
100 Ω ± 30%
5 dB/km
2 nF/km
*
*
1200 m (3937 ft)
83