Application Brochure, - Machine safety
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NEW MACHINERY DIRECTIVE 2006/42/EC STANDARDS EN/IEC 62061 - EN ISo 13849-1 EMERSON. Industrial Automation

SAFETY OF MACHINERY Principle of the safety of machinery: To guarantee the safety and health of persons exposed to the installation, operation, adjustment and maintenance of machinery. (published in the Official Journal of the European Union) ALL MACHINERY PLACED ON THE EUROPEAN MARKET (published in the Official Journal of the European Union) ”Functional safety of safetyrelated electrical, electronic and programmable electronic control systems” “Safety-related parts of electrical, electronic, programmable electronic, hydraulic, pneumatic and mechanical control systems” Part 1: General...

reliability dATA The products’ reliability data (MTTF, MTTFd, B10, B10d…) gained from reliability tests under standard conditions can be downloaded in the SISTEMA format from our website www.asconumatics.eu Distribution function Stainless steel spool and sleeve valve series L1/L2 Spool valve series 551 552-553 Shut-off valve and slow start-up Fluid control solenoid valves Compact series Pilot valve series 302-190-192 Actuator control Position detector Series 541-542-543 Stopper cylinder series 346 or NCPPG Actuators (pneumatic cylinders) are not taken into consideration in the calculation...

• Functional description: Construction and risk evaluation of machines Functional and safety-relevant requirements for safety-related control systems EN ISO 12100 Safety of machinery Basic concepts, general principles for design Electrical safety aspect EN 60204-1 Safety of machinery. electrical equipment of machines - Part 1: General requirements Design and construction of safety-related control systems for machines EN ISO 13849-1 Risk related to the hazardous event Frequency and/or duration of exposure F Probability of occurrence O Probability of avoidance P Safety integrity levels...

Survey of the safety functions of a machine: • Functional specifications to determine dangerous malfunction • Safety-related specifications Specify the diagnostic means for each component to ensure the required DC (Diagnostic Coverage) Select a system architecture among types: • A, B, C • Category or D B, 1, 2, 3 or 4 Select the system components involved in the safety functions taking their reliability data into account • MTTF MTT^ Bw B,0tf etc. Specify the other requirements: • CCF (Common Cause Failure) • Software • Architectural requirements • System integrity Create a reliability...

FOR YOUR SAFETY Only the pneumatic part is described in the form of a subsystem in these examples. Other safety-related components (e.g. protective devices, electrical logic elements) must be added to ensure the safety function is complete. The examples shown here only relate to the stopping of hazardous movements. In pneumatics, safety measures concerning the interruption of energy sources, the evacuation of potential energy (pressure contained in a part of the circuit), and a “progressive” start-up after an unexpected shutdown should not be omitted. To attain a PL = c, category 1...

Safety function: Stopping of the potentially hazardous movement of cylinder 1A. Functional description: Input 'I': not represented, movable guard or light barrier, etc. Logic element 'L': not represented, PLC B10d (valve 1V1B - series 542) = 44 912 670 cycles, i.e. an operating time of 16.2 ans, MTTFd = 162 years "high" MTTFd (sensors 1S1) = 45 000 000 h, i.e. 11 718 years "high" The case study shows: DC (Diagnostic Coverage) = 60% "low". PL Performance levels I | MTTFd rating for each channel = low I I MTTFd rating for each channel = medium I...

Safety function: Stopping of the potentially hazardous movement of cylinder 1A. Functional description: Output signal Input signal Output signal Inputs 'I1' and 'I2': not represented, movable guard or light barrier, etc. Logic elements 'L1' and 'L2': not represented, PLC B10d (valve 1V1B - series 542) = 44 912 670 cycles, i.e. an operating time of 32.4 years, MTTFd = 324 years "high" B10d (valve 2V1 - series 520) = 20 000 000 cycles, i.e. an operating time of 14.5 years, MTTFd = 145 years "high" B10d (pressure switch 2S1, dynamic rod lock 2Z1) = 4 000 000 cycles, i.e. a mission time of T10...

• Safety function: Stopping of the potentially hazardous movement of cylinder 1A. • Functional description: Output signal Input Output signal signal Inputs 'I1' and 'I2': not represented, movable guard or light barrier, etc. Logic elements 'L1' and 'L2': not represented, PLC Stop of cylinder ensured by: 0V1B: Energy isolating valve: ensures the system is exhausted. Calculation of the probability of dangerous failure: B10d (valve 1V1B - series 542) = 44 912 670 cycles, i.e. an operating time of 32.4 years, MTTFd = 324 years "high" B10d (valve 2V1 - series 520) = 20 000 000 cycles, i.e....