Overview 35
Overview
Contents of this chapter
This chapter briefly describes the FSO module with safety system components as
well as the FSO module layout, connections, type designation label and operational
characteristics.
Intended use of the FSO module
FSO-21 is a safety option module for ABB ACS880/DCS880 drives, which adds
safety functionality, including support for PROFIsafe communication with a safety
PLC through an FB module. FSO-21 also supports the use of a safety encoder
together with the FSE-31 module.
The intended use of the FSO module is to safely monitor and stop the drive
(PDS(SR), VSD) if necessary, in case a dangerous or unexpected event occurs that
requires a safe reaction of the safety related control system.
The main purpose of the FSO module is to make the systems/applications safe to
use. It can be the main safety logic for the safety system, or it can be part of a larger
safety related control system as a subsystem.
The FSO module can be used in applications where EN ISO 13850 is used. This
standard gives the requirements for the emergency stop function of the machine (that
can be implemented with FSO functions STO, SS1 and SSE). It is necessary to know
the Priorities between safety functions, see page 193.
The FSO module can be used with applications that comply with standard ISO 14118.
This standard defines the requirements for the prevention of the unexpected start-up
(POUS) of the machine (that can be implemented with FSO functions POUS, STO
and SS1).
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