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. Safety solutions provider since 2011, We offer pilz.
This classification typically indicates a higher performance level compared to Type IIIA. Devices classified as Type IIIC are designed to provide a higher level of safety integrity and reliability in ensuring that two-hand pushbuttons are used safely. http://www.pilz.com They may incorporate more advanced safety features or have a higher level of redundancy to minimize the risk of failure.