Introduction 11
Exclusion of liability
ABB is not responsible for the implementation, verification and validation of the overall
safety system. It is the responsibility of the end user (or other party) who is responsible for
the overall system, system safety and compliance with ATEX/Ex regulations.
The end user (or other responsible party) must make sure that the entire implementation
complies with all relevant standards, directives and local electrical code, and that the
system is tested, verified and validated correctly.
STO Safe torque off. In this manual, this term is used in two
different contexts:
• the STO circuit in the drive (the drive STO function)
• the STO safety function in the FSO module.
Safety functions in the FSO module (eg, STO, SSE and
SS1) activate the drive STO function, that is, open the drive
STO circuit. In addition, some safety functions can activate
the STO safety function in the FSO module, which in turn
opens the drive STO circuit.
EN/IEC 61800-5-2
Stop category 0 Uncontrolled stop EN/IEC 60204-1
Stop category 1 Controlled stop EN/IEC 60204-1
T1 Proof test interval IEC 61508
Zone An IEC term for hazardous areas. Hazardous areas are
divided into zones, according to the degree of hazard. The
degree of hazard is defined according to the probability of
the occurrence of explosive atmospheres.
EN/IEC 60079 series
Term/
abbreviation
Description Reference
To Next Page
Loading...
