Flowserve MX/QX Profibus DP/PA Field Unit Manual do Utilizador descarregar pdf (Página 19)

PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12

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Figure 2.6 – Cable Topologies

PROFIBUS

Interface

Network

Distributed Control

System (Host)

Repeater

Tree

Daisy Chain

Bus with spurs

(or drops)

Point-to-point

Schematic topology: Details such

as terminators and power supplies

not shown

Daisy Chain

2.2.4.1 Cable Shielding and Grounding for PROFIBUS DP

For best performance, PROFIBUS DP cables should be shielded. Per PROFIBUS Technical Guidelines,

the cable shield should be connected at the beginning and end of the segment. Alternatively, a 10-12

AWG ground wire may be run to each MX/QX.

In Figure 2.7, the grounding point is shown at the junction of the ﬁeld devices and at each ﬁeld device.

Figure 2.7 – Use of Shielded Cable in PROFIBUS DP

PROFIBUS

Interface

Field

Device

Field

Device

Field

Device

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Flowserve MX/QX Profibus DP/PA Field Unit Manual do Utilizador Página 19