DIN EN 60079-11:2007 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" (IEC 60079-11:2006); German version EN 60079-11:2007
2012DIN EN 60079-11:2012 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" (IEC 60079-11:2011 + Cor.:2012); German version EN 60079-11:2012
2007DIN EN 60079-11:2007 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" (IEC 60079-11:2006); German version EN 60079-11:2007