ABB Freelance 800F Process-level automation: Remote I/O

FouNDATIoN Fieldbus Linking Device

LD 800HSE

LD 800HSE serves as a gateway between High

Speed Ethernet (HSE Subnet) and the FOUNDATION

Fieldbus field devices on H1 links. The provision of

data from a H1 link to the HSE Subnet, as well as

from one H1 link to another, is guaranteed by the

communication – typical of FOUNDATION Fieldbus –

between field devices on various H1 links and field

devices on the HSE Subnet. In addition, the client/

server gateway allows function blocks in H1 devices

to be accessed via the HSE interface. LD 800HSE is

also designed for redundancy.

other fieldbus devices

To protect the fieldbus segment and the links, the

Fieldbus Barrier FB 900 series can be used. The PC

900 Power Conditioner provides a higher supply

current for a H1 link. These devices are described

in detail in ABB’s Fieldbus Devices brochure

Process-level automation: Remote I/O

The fieldbus module for PROFIBUS enables connec

tion of remote I/O units such as the S800 or S900.

Whereas the S800 is generally used in process auto

mation, the S900 is preferred, due to its extended

channel diagnostics and intrinsic safety, in the chemi

cals segment and in areas where explosion protec

tion is required.

S800

S800 I/O is a comprehensive, distributed and modu

lar process I/O system that communicates with parent

controllers via PROFIBUS. Thanks to its broad con

nectivity, the system is able to communicate with a

wide range of process control systems from both

ABB and other suppliers.

By permitting installation in the field, close to sensors

and actuators, S800 I/O greatly reduces the installa

tion cost by reducing the cost of cabling. It is possi

ble to exchange modules and reconfigure the system

during operation. Redundancy options allow a high

degree of availability.

S900

The remote S900 I/O system can be installed directly

in zone 1 and zone  hazardous areas.

It communicates with the control system level using

the Profibus standard, therefore reducing marshalling

and wiring costs. The system is sturdy, error-tolerant

and easy to service. Moreover, the S900 I/O system

is characterized by a compact design, cyclical trans

mission of secondary HART variables, parameteriza

tion and diagnosis of all HART field devices via the

fieldbus. Its redundancy ensures maximum availability.

Integrated disconnection mechanisms allow replace

ment during operation, meaning that there is no need

to interrupt the primary voltage in order to exchange

the power supply units. Thanks to its sturdy, space

saving design and stable casing that is suitable for

any environment, S900 is the best and most cost

effective I/O system for use in zone 1 and  hazard

ous areas.