Requirements Section Types
I II III
A B C
Use of category 3 (EN 574:1996+A1:2008) 6.3 x x
Use of category 4 (EN 574:1996+A1:2008) 6.4 x
*) NOTE for the selection of Type I see 8.6.
Source: EN 574:1996+A1:2008, table 1
ISO 13851:2019 Safety of machinery – Two-hand control devices – Functional aspects
Chapter 4 describes the requirements for controllers
Table A-52 List of two-hand control device types and the minimum safety requirements
Requirements Section Types
I II III
A B C
Use of both hands (simultaneous actuation) 5.1 x x x x x
Relationship between input signals and output signal 5.2 x x x x x
Termination of the output signal 5.3 x x x x x
Avoidance of unintentional operation 5.4 x x x x x
Preventing bypassing 5.5 x x x x x
Recreating the output signal 5.6 *) x x x x
Synchronous actuation 5.7 x x x
Application of category 1 (ISO 13849-1) 6.2 x x
Application of category 3 (ISO 13849-1) 6.3 x x
Application of category 4 (ISO 13849-1) 6.4 x
*) NOTE for the selection of Type I see 8.6.
Source: ISO 13849-1
A.5 Abbreviations
Table A-53 List of abbreviations
Term / abbrevia‐
tions
Explanation
AC Alternating Current
ADV Advanced
Accu Accumulator
AND Logical "and" operation, discrepancy analysis
ANSI American National Standard Institute
ARMS Rms current in amperes
ASIC User-specic integrated circuitry
AWG American Wire Gauge
Appendices
A.5 Abbreviations
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA 345
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