This classification generally indicates a lower performance level compared to Type IIIC. Devices classified as Type IIIA still provide adequate safety for two-hand pushbuttons, but they may have fewer safety features or a lower level of redundancy compared to Type IIIC devices.
EN 574 is the European standard that specifies requirements for two-hand control devices, ensuring that they meet necessary safety criteria to protect operators from hazardous machine movements. When choosing between Type IIIC and Type IIIA devices from the PNOZ X product range, the decision typically depends on the specific safety requirements of the machinery and the risk assessment conducted for the application.
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