2013 National Robot Safety Conference Essentials of Machine Controls Safety Considerations Heinz E. Knackstedt TÜV Functional Safety Engineer C&E Sales, Inc. 677 Congress Park Drive Dayton Ohio 45459 Phone: (800) 228-2790 x112 Email:
[email protected] Cell (937) 545-6494 Safety Circuit Design 13-10-14 page 1 2013 National Robot Safety Conference OBJECTIVE • Encourage participation and free discussions on the subject of application and design of the safety related parts of the control system • Identify the basic concepts which may be applied to any machine tool or assembly machine control based risk reduction, including robots and fluid power • Definition of risk reduction requirements • Review of the risk reduction circuit categories as defined by EN 954-1996, ISO 13849-1:1999 RIA 15.06:1999, ANSI B11.0 and B11.19 through the use of example circuits • Review control design basics as the backbone of the “new” ISO 13849-1:2006 Safety Circuit Design 13-10-14 page 2 2013 National Robot Safety Conference Overview • Design of safety circuits for robotic applications typically employ management of hazards from auxiliary equipment • Injury from robotic applications are frequently caused, not by the robot, but from this equipment • The risk assessment must identify all sources of harm, not only the robot • The risks from all hazards to which an individual can be exposed while attending the robot must also be reduced to an acceptable level • The principles and circuits discussed are generic and may be applied to safety control circuits regardless