National Instruments Fieldbus - Manual (Page 9)

© National Instruments Corporation 1-1 FBUS-HSE/H1 LD User Manual
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Overview of FBUS-HSE/H1
Linking Device (LD) Hardware
This chapter provides an overview of the FBUS-HSE/H1 Linking Device
(LD) hardware.
Product Overview
High Speed Ethernet (HSE) is an extension to the Foundation Fieldbus
specification and is governed by the Foundation Fieldbus organization.
HSE compliments the Foundation Fieldbus H1 network (31.25 kb/s)
specification by offering a high speed (10 Mb/s) link to H1 segments.
Built on standard Ethernet, HSE extrapolates the Fieldbus protocol and
offers controllers the ability to schedule and control H1 devices directly
over Ethernet.
An FBUS-HSE/H1 system consists of at least one linking device connected
to an Ethernet network and at least one H1 device.
The FBUS-HSE/H1 LD connects a 10 Mbps Ethernet network to Fieldbus
H1 devices. Each H1 network can be connected to multiple Fieldbus
devices. Each FBUS-HSE/H1 can support two H1 segments, and each
segment can support up to 16 H1 field devices (without repeaters). Because
the FBUS-HSE/H1 LD is an HSE linking device, your network topology
determines the maximum number of FBUS-HSE/H1 LDs that can be
installed on your Ethernet network.
The FBUS-HSE/H1 LD connects directly to a 10 Mbps Ethernet network.
The FBUS-HSE/H1 autodetects the speed of the Ethernet connection and
configures itself accordingly.