Power repeater / power supply according to IEC 61158-2
FOUNDATION FieldbusGeneral
Subject to reasonable modifications due to technical advances.
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FOUNDATION FieldbusGeneral
5.1
Ranges of application of power repeaters
Power repeaters combine two identical H1 bus segments with each other on the phys-
ical level. Since the PROFIBUS PA and the H1 bus of the FOUNDATION Fieldbus
use the same physical transmission configuration, the power repeaters can also be
used for both systems. They are used to
• be able to increase the line length of the bus segment
• to be able to connect more instruments on a bus segment that a segment coupler/
a bridge can supply power to.
• to implement from a non-intrinsically safe bus segment to an intrinsically safe bus
segment.
The following illustration shows the possibilities for usage of power repeaters for both
the PROFIBUS PA and the FOUNDATION Fieldbus:
Figure 5.1: Power repeater on a PROFIBUS PA segment
Figure 5.2: Power repeater on a FOUNDATION Fieldbus H1 segment
Note the definition of stub line length on
PROFIBUS PA non-intrinsically safe
PROFIBUS
PROFIBUS DP
Segment Coupler
Fieldbus
cases EEx ia IIC
repeater
P o w er
PA in some
terminator
FOUNDATION Fieldbus H1 bus
FF H1 bus in some
Power
cases EEx ia IIC
H2 bus
Bridge
non-intrinsically safe
repeater
Fieldbus
terminator
