Endress+Hauser iTEMP TMT184 PROFIBUS-PA Manuel De Mise En Service page 52

4 Wiring
52
The following listing includes suitable fieldbus cables for use in non-Ex areas from different manuf-
acturers:
• Siemens: 6XV1 830-5BH10
• Belden: 3076F
• Kerpen: CeL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL
Maximum total cable length
The maximum network length is dependent on the ignition classification and the cable specification.
The total cable length consists of the main cable length and spur lengths (>1 m). Please take note
of the following:
• The maximum total cable length is dependent on the cable type used (see cable type A and B).
Maximum spur length
A spur is defined as the cable between the distribution box and field unit. In non-Ex applications,
the maximum spur length is dependent on the number of spurs (>1 m).
Number of spurs
Max. length per spur
Number of field units
In systems compliant to FISCO in ignition classes EEx ia the cable length is limited to a maximum
1000 m.
A maximum of 32 users per segment in non-Ex applications and 9 users in Ex applications (EEx ia.
IIC) is allowed. The actual number of users must be set during the project planning stage.
Bus termination
The start and end of each bus system must be terminated using a bus terminator. In certain connec-
tion boxes (non-Ex) the bus can be terminated using a switch. If this is not the case then a separate
bus terminator must be installed. For this please note the following:
• On a branched bus segment the measurement unit furthest from the segment coupler is the end
of the bus.
• If the fieldbus is extended using a repeater then the extension must also be terminated at both
ends.
Further information
For more general information and hints for connections please look up the operating manual
BA198F/00/en. (See »Further documentation« on page 81.)
1 to 12 13 to 14 15 to 18
120 m 90 m 60 m
TMT184
19 to 24 25 to 32
30 m 1 m
Endress+Hauser