IEC 61496 offers guidance for several sensor types. It refers to IEC 62061, which specifies requirements and makes recommendations for the design, integration, and validation of electrosensitive protective equipment (ESPE) for machines, including safety integrity levels (SILs), and ISO 13849 that covers safety of machinery and safety-
related parts of control systems including safety performance levels (PLs) (Table 1). IEC 62998 is newer and can often be a better choice since it includes guidance on implementing sensor fusion, using artificial intelligence (AI) in safety systems, and using sensors mounted on moving platforms outside the coverage of IEC 61496. R15.08 Part 3, when it's released, may make the R15.08 series the best since it will add safety requirements for users of AMR systems and AMR applications. Likely topics may include sensor fusion and more extensive AMR stability testing and validation.
Good, better, best AMR designers have a range of safety standards to consider, starting with general-purpose functional safety standards like IEC 61508, ISO 13849, and IEC 62061. There are also more specific safety standards related to sensing human presence, such as IEC 61496, IEC 62998, and the ANSI/A3 R15.08 series of standards.
Type
Requirement
1
2
3
4
Safety performance in accordance with IEC 62061 and/or ISO 13849-1
SIL 1 and/ or PL c
SIL 2 and/ or PL d
SIL 3 and/ or PL e
N/A
SIL = safety integrity level; PL = performance level
Table 1: Safety requirements for ESPE by type specified in IEC 61496. (Table source: Analog Devices)
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