Centro Barbecue 6500 Safe use Specifikace stáhnout pdf (Strana 10)

10 Rockwell Automation Publication 2094-RM002B-EN-P - May 2012

Chapter 1 Safety Concept

Important Safety Considerations

You are responsible for the following:

• The set-up, safety rating, and validation of any sensors or actuators

connected to the system

• Completing a system-level risk assessment and reassessing the system any

time a change is made

• Certification of the system to the desired safety performance level

• Project management and proof testing

• Access control to the system, including password handling

Safety Category 4 Performance Definition

The safety-related parts have to be designed with the following considerations to

achieve Safety Category 4 according to ISO 13849-1:2006:

• The safety-related parts of machine control systems and/or their protective

equipment, as well as their components, must be designed, constructed,

selected, assembled, and combined in accordance with relevant standards

so that they can withstand expected conditions.

• Basic safety principles must be applied.

• A single fault in any of its parts does not lead to a loss of safety function.

• A single fault is detected at or before the next demand of the safety

function, or, if this detection is not possible, then an accumulation of faults

must not lead to a loss of the safety function.

• The average diagnostic coverage of the safety-related parts of the control

system must be high, including the accumulation of faults.

• The mean time to dangerous failure of each of the redundant channels

must be high.

• Measures against common cause failure must be applied.

Stop Category 0 Definition

Stop Category 0 is achieved with immediate removal of power to the actuator,

resulting in an uncontrolled coast to stop. Safe Torque Off accomplishes a Stop

Category 0 stop.

IMPORTANT

When applying functional safety, restrict access to qualified, authorized

personnel who are trained and experienced.

ATTENTION: When designing your system, consider how personnel will exit

the machine if the door locks while they are in the machine. Additional

safeguarding devices may be required for your specific application.

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Centro Barbecue 6500 Safe use Specifikace Strana 10