Rockwell Automation Publication SAFETY-AT125C-EN-P - February 2022 3
Enabling Switch with an Integrated Safety Controller and a POINT Guard I/O Safety Module Safety Function Application Technique
Summary of Changes
This publication contains new and updated information as indicated in the following table.
General Safety Information
Contact Rockwell Automation to learn more about our safety risk assessment services.
Safety Distance Calculations
Non-separating safeguards provide no physical barrier to prevent access to a hazard. Publications that offer guidance for calculating
compliant safety distances for safety systems that use non-separating safeguards, such as light curtains, scanners, two-hand controls, or
safety mats, include the following:
EN ISO 13855:2010 (Safety of Machinery – Positioning of safeguards with respect to the approach speeds of parts of the human body)
EN ISO 13857:2008 (Safety of Machinery – Safety distances to prevent hazardous zones being reached by upper and lower limbs)
ANSI B11:19 2010 (Machines – Performance Criteria for Safeguarding)
Separating safeguards monitor a movable, physical barrier that guards access to a hazard. Publications that offer guidance for calculating
compliant access times for safety systems that use separating safeguards, such as gates with limit switches or interlocks (including
SensaGuard™ switches), include the following:
EN ISO 14119:2013 (Safety of Machinery – Interlocking devices associated with guards - Principles for design and selection)
EN ISO 13855:2010 (Safety of Machinery – Positioning of safeguards with respect to the approach speeds of parts of the human body)
EN ISO 13857:2008 (Safety of Machinery – Safety distances to prevent hazardous zones being reached by upper and lower limbs)
ANSI B11:19 2010 (Machines – Performance Criteria for Safeguarding)
In addition, consult relevant national or local safety standards to assure compliance.
Topic Page
Updated the Bill of Material. 6
Replaced the Electrical Schematic diagram. 9
Added a graphic that depicts the I/O configuration. 10
Replaced the SISTEMA screen shots. 13…14
IMPORTANT
This application example is for advanced users and assumes that you are trained and experienced in safety
system requirements.
ATTENTION: Perform a risk assessment to make sure that all task and hazard combinations have been identified and
addressed. The risk assessment can require additional circuitry to reduce the risk to a tolerable level. Safety circuits must
consider safety distance calculations, which are not part of the scope of this document.
ATTENTION: While safety distance or access time calculations are beyond the scope of this document, compliant safety
circuits must often consider a safety distance or access time calculation.
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