Functional safety according to IEC 61508 & IEC 61511

Functional safety is focused on reducing the level of risk in a device or system by identifying potentially hazardous conditions and enabling corrective actions to avoid or reduce the impact of an accident. It depends on active, automatic safety technology to respond to a potentially dangerous situation.

IEC 61508 defines functional safety as freedom from unacceptable risk of physical injury or of damage to the health of people, either directly, or indirectly as a result of damage to property or equipment.

Askalon supplies products and final element functions certified according to IEC 61508 by different 3rd parties, manufacturer certified technicians make sure that all work fulfills the requirements of competence in IEC 61508 & 61511.

SIL is a term that means Safety Integrity Level. It is used in most Functional Safety standards including several industry specific standards. Safety instrumented system (SIS) is an implementation of one or more safety instrumented functions (SIF). A SIS is composed of any combination of one or more sensors, logic solvers, and final elements. A SIS usually has a number of safety functions with different safety integrity levels (SIL) so it is best avoid describing it by a single SIL.

See the Safety Automation Equipment at


Functional safety SIL and SIS Askalon

Any questions?

Erik Rune
Solution Seller
Phone. +46 54-57 92 31

Fredrik Ekeroth
Solution Seller
Phone. +46 54-57 92 06

Joachim Nyqvist
Solution Seller
Phone. +46 54-57 92 17

Niklas Pettersson
Account Manager
Phone. +46 54-57 92 09

Anders Praem
Inside Sales Engineer
Phone. +45 2137 7759

Frank Kirk Hansen
Area Account Manager West
Phone. +45 4053 6511

Kenn Gerwien
Area Account Manager East
Phone. +45 2346 5513

Slawka Pedersen
Inside Sales Manager
Phone. +45 2137 7702

Aleksei Seleznev
Inside Sales Engineer
Phone. +358 40 530 2017

Jani Collan
Key Account Manager
Mob. +358 40 702 8711

Jani Ilmaniemi
Key Account Manager Nuclear
Phone. +358 207 416 203
Mob. +358 40 502 1461

Tommi Penttilä
Sales Manager Conventional Power
Phone. +358 207 416 208