2014BS EN 61158-5-12:2014 Industrial communication networks. Fieldbus specifications. Application layer service definition. Type 12 elements
2012BS EN 61158-5-12:2012 Industrial communication networks. Fieldbus specifications. Application layer service definition. Type 12 elements
2009BS EN 61158-5-12:2008 Industrial communication networks — Fieldbus specifications — Part 5-12: Application layer service definition — Type 12 elements