ABB FOUNDATION Fieldbus Linking Device, LD 800HSE and LD 800HSE

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.

Features of the Linking Device

The LD 800HSE is a gateway between an FF High Speed Ethernet (FF-HSE) subnet

and FF-H1 links. It supports device redundancy.

The linking device is registered as class 42c of the HSE profile, therefore providing

the following functions:

• It supports up to four separate galvanically isolated FF-H1 links. In each of

these links, the linking device operates as the Link Master as well as the SM

Time Publisher

• Identification of devices connected to the H1 links

• Configuration of connected H1 devices through System Management and

Network Management via HSE

• Access to the function blocks of connected H1 devices via HSE

• Republishing of process data between H1 links

• Republishing of process data from H1 to HSE and vice versa

• Distribution of alarms and events sent by H1 devices