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.