MTL 9312-FB-ST-SS-SP, Инструкция по эксплуатации

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INM9312-FB-ST-SS-1 Oct 2008
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Fieldbus instrument
A field instrument that is capable of communicating in a fieldbus network. Typical fieldbus instruments
are valves and transmitters.
Host
The fieldbus control system, including the fieldbus interface card.
Segment
A section of fieldbus that is terminated in its characteristic impedance, meaning a cable and fieldbus
devices installed between a pair of terminators. Segments can be linked by repeaters to form longer
fieldbuses. The standard allows each segment to support up to 32 fieldbus devices, but many systems
limit this to 16 fieldbus devices.
DP/PA coupler
The DP/PA coupler connects a Profibus PA segment with a Profibus DP. The fieldbus power supply may
be integrated in the DP/PA coupler.
Master
The Profibus master is generally a process control system (PCS), a programmable logic controller (PLC)
or a PC.
Structure of a Foundation Fieldbus H1 segment
Structure of a Profibus PA segment
Host
Fieldbus
power
supply
Trunk (Foundation fieldbus H1)
Field devices
Power
Spurs
Power
(option)
Terminator
Figure 1: - A F
OUNDATION
fieldbus TM segment
Host
Fieldbus
power
supply
Trunk (Profibus PA)
Field devices
Power
Spurs
Power
(option)
Terminator
Figure 2: - A Profibus-PA segment