Datasheet

Safety:
B10 value / with high demand rate

according to SN 31920
50,000
T1 value / for proof test interval or service life

according to IEC 61508
a 10
Failure rate (FIT value) / with low demand rate

according to SN 31920
FIT 50
Proportion of dangerous failures

with low demand rate / according to SN
31920
% 40

with high demand rate / according to SN
31920
% 40
Protection against electrical shock
finger-safe
Further information:
Information- and Downloadcenter (Catalogs, Brochures,…)
http://www.siemens.com/industrial-controls/catalogs
Industry Mall (Online ordering system)
http://www.siemens.com/industrial-controls/mall
CAx-Online-Generator
http://www.siemens.com/cax
Service&Support (Manuals, Certificates, Characteristics, FAQs,...)
http://support.automation.siemens.com/WW/view/en/3RV2021-4NA10/all
Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)
http://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=3RV2021-4NA10
http://support.automation.siemens.com/WW/view/en/33244368&td=1
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