Endress+Hauser Proline 200 PROFIBUS PA, Brief Operating Instructions

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Electrical connection Proline 200 PROFIBUS PA
14 Hauser
Maximum spur length
The line between the distribution box and field device is described as a spur. In the case of
applications in non-hazardous areas, the max. length of a spur depends on the number of
spurs >1 m (3.28 ft):
Number of spurs Max. length per spur
1…12 120 m (400 ft)
13…14 90 m (300 ft)
15…18 60 m (200 ft)
19…24 30 m (100 ft)
25…32 1 m (3 ft)
Number of field devices
For systems designed in accordance with the Fieldbus Intrinsically Safe Concept (FISCO) with
EEx ia types of protection, the cable length is limited to a maximum of 1 000 m (3 300 ft). A
maximum of 32 users per segment in non-hazardous areas or a maximum of 10 users in
hazardous areas (EEx ia IIC) is possible. The actual number of users must be determined
during the planning stage.
Bus termination
1. Always terminate the start and end of each fieldbus segment with a bus terminator.
2. For different connection boxes (non-hazardous area):
Bus terminator can be activated via a switch.
3. In all other cases:
Install a separate bus terminator.
4. For a branched bus segment:
The device furthest from the segment coupler represents the end of the bus.
5. If the fieldbus is extended with a repeater,
terminate the extension at both ends.