ABB ACS580-07 - Safety component types; Safety block diagrams; Relevant failure modes; Fault exclusions

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Safety component types
Safety component types as defined in IEC 61508-2:
• emergency stop button: type A
• safety relay(s): type A
• drive STO circuit: type A.
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Safety block diagrams
The components that are included in the safety data calculations are shown in the
safety block diagram(s). The components not included in the delivery are not included
in the safety data calculations.
1 2 3
Emergency stop button1
Emergency stop safety relay2
Drive STO3
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Relevant failure modes
Relevant failure modes are:
• internal failures of safety relays, STO and the emergency stop button. These
failures are included in the failure rate value of the function.
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Fault exclusions
Fault exclusions (not considered in the calculations):
• short and open circuits in the cables of the safety circuit
• short and open circuits in the cabinet terminal blocks of the safety circuits.
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Operation delays
Emergency stop total delay: less than 250 ms.
Ambient conditions
For the environmental limits for the safety functions and the drive, refer to the drive
hardware manual.
Related standards and directives
NameStandard
Adjustable speed electrical power drive systems - Part 5-2: Safety requirements –
Functional
IEC 61800-5-2:2016
EN 61800-5-2:2007
Safety of machinery – Functional safety of safety-related control systemsEN IEC 62061:2021
36 Technical data