Safety of machinery – Electro-sensitive protective equipment – Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR) (IEC 61496-3:2008); German version CLC/TS 61496-3:2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2009
