Endress+Hauser Proline Prosonic Flow 93, Руководство по эксплуатации

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Proline Prosonic Flow 93 PROFIBUS DP/PA Wiring
Hauser 61
Maximum spur length
The line between the distribution box and field device is described as a spur.
In the case of non-Ex applications, the max. length of a spur depends on the number of
spurs >1 m (>3.28 ft):
Number of field devices
In systems that meet FISCO with EEx ia type of protection, the line length is limited to
max. 1000 m (3300 ft). A maximum of 32 users per segment in non-Ex areas or a maximum of
10 users in an Ex-area (EEx ia IIC) is possible. The actual number of users must be determined
during configuration.
Bus termination
The start and end of each fieldbus segment are always to be terminated with a bus terminator. With
various junction boxes (non-Ex), the bus termination can be activated via a switch. If this is not the
case, a separate bus terminator must be installed.
Note the following points:
• In the case of a branched bus segment, the device furthest from the segment coupler represents
the end of the bus.
• If the fieldbus is extended with a repeater then the extension must also be terminated at both
ends.
Further information
General information and further notes regarding the wiring are contained in BA034S/04:
"Guidelines for planning and commissioning, PROFIBUS DP/PA, field communication."
Number of spurs 1 to 12 13 to 14 15 to 18 19 to 24 25 to 32
Max. length per spur
[m] 120 90 60 30 1
[ft] 393 295 196 98 3.28