FieldBarrier
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
08/2007 122329
3
1 Introduction
The FieldBarrier F*D0-FB-Ex4.*** and RD0-FB-Ex4 connect up to 4 intrinsically safe
field devices. It is connected via non-intrinsically safe connections to the trunk of a
fieldbus with a physical layer in accordance with IEC 61158-2.
The FieldBarrier works exclusively on the physical layer, which makes it independent
of the protocol. This allows it to be substituted for any field bus with a physical layer
in accordance with IEC 61158-2. This includes the FOUNDATION fieldbus and the
PROFIBUS MBP, for example.
The trunk of the fieldbus can be supplied via additional terminals to other FieldBarriers
(cascading) or other fieldbus stations.
If the trunk is mounted in increased safety, the FieldBarrier can be mounted in the
Zone 1 and Zone 22 (non-conductive dust) of a hazardous area. The terminals for the
trunk are designed in increased safety EEx e.
If the FieldBarrier is the last device connected to the trunk, it must be terminated with
a fieldbus terminator. A fieldbus terminator is integrated into the FieldBarrier for this
purpose, and can be turned on when it is needed.
The trunk is galvanically separated from the outputs. 40 mA per output is available for
the intrinsically safe power supply of the field devices. The number of field devices
that can actually be operated on an output depends on their power consumption.
The line length per output can be up to 120 m and is operated without a fieldbus ter-
minator. The outputs correspond to the requirements of PTB Report W-53 (FISCO
Model.) For additional information on this subject, please refer to chapter 5.2.1
Each output has a voltage and current limit. This prevents the entire fieldbus segment
from failing if a fault occurs on just one output.
The technical data can be found in the data sheet.
More recent documentation also refers to PROFIBUS MBP in connec-
tion with PROFIBUS PA. MBP stands for Manchester Bus powered.
PROFIBUS PA and PROFIBUS MBP are identical. The following sec-
tion refers only to the term PROFIBUS MBP that has just been intro-
duced.
PROFIBUS MBP-IS refers to the intrinsically safe version of the
PROFIBUS MBP.
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