The EN ISO 20344 standard specifies the requirements and test methods for safety footwear. It covers various aspects of footwear performance, including abrasion resistance. However, there is no specific mention of a "Plastic Rubber DIN Abrasion Tester" in the EN ISO 20344 standard.

The DIN (Deutsches Institut für Normung) is a German standards organization that develops technical standards for various industries. They have published standards for abrasion testing, such as DIN 53516, which is a method for determining the abrasion resistance of rubber compounds.

To assess the abrasion resistance of plastic or rubber materials used in safety footwear or other applications, a commonly used instrument is the Taber Abrasion Tester. The Taber Abrasion Tester determines the resistance of materials to abrasion by subjecting them to a rotating abrasive wheel under controlled conditions. This instrument can provide quantitative data on the material's abrasion resistance and is widely used in various industries.

It's important to note that the specific testing equipment and methods used for abrasion testing may vary depending on the specific requirements of the standard, industry practices, and the materials being tested. Therefore, it is always recommended to refer to the relevant standard or consult with testing experts to determine the appropriate equipment and test methods for evaluating the abrasion resistance of plastic or rubber materials in accordance with the EN ISO 20344 standard or other applicable standards.