在实践中，应该始终对气动元件安全性相关问题加以考量，通过技术文件和风险评估来确定其重要性。EC 机械指令 2006/42/EC 是机器功能安全性的决定性基本指南，协调标准 EN ISO 13849 也很重要。好消息是 Festo 可以在所有的安全相关问题上提供专家支持。除了提出建议以外，我们还为我们的解决方案提供精确的应用说明。
Festo 提供丰富的单个气动元件，这些元件需要作为系统的一部分接受评估。不同于采用认证元件的电子产品，特定气动应用的功能安全性通常需要使用常规硬件组件来设计和构建。在这种情况下，机械制造商有责任提供与安全性相关的评估和文件。
与安全相关的气动装置非常重要，这也是 Festo 将提供产品所有相关数据作为标准做法的原因所在。此外，我们的项目工程师可随时为您提供专家建议，帮助您洞悉最新要求，例如与您一起进行故障模式和影响分析。凭借该服务，在确保系统安全性的过程中，您您可以大大节约时间和成本。
The SDE function enables the downstream pneumatic system to be safely disconnected and de-energised.
Application note:
Safe de-energisation with soft start/quick exhaust valve MS6-SV-...-E (PDF)
The SEZ function permits safe energisation using a defined force/time function (soft-start function).
The PUS function prevents the start position of the valve from changing and leading to an unexpected start-up of a machine function.
Application notes:
The SBC function provides a safe output signal for controlling an external brake or clamping unit.
The power supply to the pneumatic drive is disconnected. The chambers of the pneumatic drive are exhausted so that no force (torque) can be generated that could lead to a dangerous movement.
Application notes:
The pneumatic drive is brought to a standstill. The free movement of the output component is blocked. It can be blocked by positive locking or friction locking.
The free movement of the output component is blocked. It can be blocked by positive locking or friction locking.
Application note:
The supply of energy to or dissipation of energy from at least one chamber of the pneumatic drive is closed, and the energy that has thus been saved can be used for the shutdown.
Application note:
The SET function prevents the pneumatic drive from deviating from the torque (force) equilibrium by more than a specified value.
The PUS function prevents the start position of the valve from changing and leading to an unexpected start-up of a machine function.
The SLS function prevents the pneumatic drive from exceeding the permissible speed.
The SLT function prevents the pneumatic drive from exceeding the permissible torque (force).
The SDI function prevents the drive from moving in the incorrect direction.
Application note:
The SOS function prevents the drive from deviating from the stopping position by more than a specific amount. The compressed air supply is maintained to enable the drive to withstand the effect of external forces (e.g. variable load) without further measures (e.g. mechanical holding brakes).
Two-handed and simultaneous actuation of two control elements activates an output signal.
The volumetric flow rates into and out of the two chambers of the pneumatic drive are reduced or blocked. This slows down the movement of the drive and brings it to a stop. If the standstill is reached in accordance with the specified tolerance window, the pressure in the chambers of the pneumatic drive is reduced so that no force (torque) is generated that could lead to a dangerous movement.
The volumetric flow rates into and out of the two chambers of the pneumatic drive are reduced or blocked, thus slowing down the movement of the drive and bringing it to a stop. If the standstill is reached in accordance with the specified tolerance window, the pressure in the chambers of the pneumatic drive is maintained so that the existing pressure can be used to maintain the standstill.
How? Take a look at our guidelines for machine and system safety. Here you’ll find not only comprehensive information about the fundamental standards, risk assessment and risk reduction, but also detailed overviews of all safety functions with the right products to integrate these functions in your system.
The guidelines also include an overview of all the seminars offered by Festo Training and Consulting for safety engineering qualifications.
Find out more in the guidelines for machine and system safety (PDF)