Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition (IEC 65C/553/CDV:2009); English version FprEN 61158-2:2009
Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition (IEC 61158-2:2010); English version EN 61158-2:2010, only on CD-ROM— 430 стр.