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1
Introduction
1.1
Explanation of the symbols used in the manual
This symbol warns of danger. If the instruction given in this warning is not heeded the result
could be the injury or death of personnel and/or the severe damage or destruction of equipment.
This symbol advises of a possible failure. If the instruction given in this warning is not heeded,
the device and any plant or systems connected to it could develop a fault or even fail completely.
This symbol indicates important information.
1.2
Aim of the manual
This manual should enable the user to install the HART multiplexer master, to commission it and to maintain
it. It provides all the information required on status and fault messages and also provides a guide to fault
diagnosis and rectification.
In addition, the manual provides an introduction to HART communication. For additional infor-
mation, the attention of the user is directed to the bibliography in the appendix and to other lite-
rature on the subject, including the publications of the HART Communication Foundation
(www.hartcomm.org).
Where reference to the bibliography is made in this manual it is indicated thus: /3/.
The appendix also explains many terms and abbreviations used in this manual.
1.3
Intended use
The HART multiplexer master KFD2-HMM-16 provides full HART access to up to 256 field devices and
hence operation with the conventional 4m A.. .2 0mA current loops. It thus acts as a transparent gateway
between the service station (PC, or process control system) and the transmitters.
The multiplexer can be used within Zone 2 hazardous areas or in the safe area. Power is provided by a 24 V
(nominal voltage) DC power supply. Connection to the process control system or PC is via an R S485
interface.
It should be stressed that the HART multiplexer master KFD2-HMM-16 is approved for use in
zone 2 and therefore may not be used in zone 0 or 1 hazardous areas. If the equipment is used
in conjunction with intrinsically safe or associated apparatus, then this use must take place in
front of the Ex-barrier (e. g. transmitter power supply device).
Reference should be made to the statement of conformity contained in TÜV 00 ATEX 1547 X.
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
HART Multiplexer Master KFD2-HMM-16
Copyright Pepperl+Fuchs, Printed in Germany
Introduction
5
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