ABB SafeMove2, Applications Manual, Page: 22 / 238

1.2.3 Specific safety requirements
Specific safety requirements for SafeMove
SafeMove complies with EN ISO 10218-1 in general and specifically complies with
chapter 5.4.2, that is, the following requirements.
When safety related control systems are required, the safety related parts shall be
designed so that:
• A single fault in any of these parts shall not lead to the loss of the safety
function.
• Whenever reasonably practicable, the single fault shall be detected at or
before the next demand upon the safety function.
• When the single fault occurs, the safety function is always performed and a
safe state shall be maintained until the detected fault is corrected.
• All reasonably foreseeable faults shall be detected.
This requirement is considered to be equivalent to structure category 3 as described
in ISO 13849-1. Category 3 is normally fulfilled by redundant circuits, such as dual
channels, which is the case for SafeMove. SafeMove together with the safety
module and the robot controller also complies with performance level (PL) "d"
according to ISO 13849-1. This safety level is equivalent to SIL 2 as defined in IEC
61508.
22 Application manual - Functional safety and SafeMove2
3HAC052610-001 Revision: P
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1 Introduction
1.2.3 Specific safety requirements