Rockwell Automation Publication 442G-UM002B-EN-P - August 2021 17
Chapter 2
Safety Concept
Standards The access box satisfies applicable requirements in the following standards
that are related to functional and machinery assembly:
• IEC 60947-5-3: 1999/A: 2005
• EN/ISO 13849-1:2008/AC: 2009 (Performance Level e [PLe], Category 4)
• IEC 61508: 2010 (SIL 3)
• IEC 62061: 2005 (SIL CL 3)
• EN/ISO 14119:2013
• UL 508 17th Edition dated 3/19/2013
Safety Certification The Guardmaster® access box is a Type 4 interlocking module with guard
locking and high-coded RFID actuators according to EN ISO 14119.
The access box is certified for use in safety applications up to and including
Performance Level PLe and Category 4 in compliance with EN ISO 13849-1 and
SIL 3 according to IEC 61508 and IEC 62061, for guard position monitoring,
guard lock monitoring, and guard locking control.
Control of Guard Locking
The access box PFH
d
and the external control (for example, PFH
d
of the
standstill monitor) determine the safety level of guard locking control. Guard
locking is controlled with the Unlock output signal.
Figure 13 - Control of Guard Locking
Access Box
PFH
d
(internal electronics)
PFH
d
(For example,
standstill monitor)
Safety Output Signal
(Unlock)
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