1 Introduction
FOUNDATION™ Fieldbus (FF) is a fieldbus protocol based on international standards
and designed for applications in the manufacturing industry, process automation and
buildings automation. The guidelines for this fieldbus standard are published by the
Fieldbus Foundation.
FF defines two communication profiles, H1 and HSE. The H1 profile, with a transmission
rate of 31.25 kbit/s, is preferably used for direct communication between field devices
in one link (H1 link). The HSE profile, which is based on standard Ethernet and typically
features a transmission rate of 100 Mbit/s, serves first and foremost as a powerful
backbone for the connection between H1 links. The first devices that are already available
on the market and support the HSE profile are FF Linking Devices. They serve as a
gateway between the field devices on the H1 links and the HSE subnet.
The Linking Device LD 810HSE Ex is an electrical equipment with degree of protection
Ex nA, approved for use in hazardous areas of Zone 2 or in the safe area. The 4 FF-H1
interfaces are designed according to the protection method Ex ic. Only certified circuits
with an according protection method shall be connected to these FF-H1 interfaces.
Before putting the LD810 HSE Ex into operation, the corresponding marking field has
to be signed (e. g. if the device is used in ic environment, the upper marking field on
the type label has to be signed).
• Use an appropriate permanent pen for signing, e. g. an etching pen.
• More than one marking is not allowed. If you need a second marking, you must
replace the existing equipment with a new one.
• An equipment that has been operated under non-intrinsically safe conditions is
no longer permitted to be used under intrinsically safe conditions.
The LD 810HSE Ex is only approved for intended and appropriate use. In case of
noncompliance, the warranty and manufacturer’s liability do no longer apply.
2PAA114135-610 17
1 Introduction
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