Industrial communication networks. Profiles - Functional safety fieldbuses. Additional specifications for CPF 31 Scope This part of the IEC 617843 series specifies a safety communication layer (services and protocol) based on CPF 3 of IEC 617841, IEC 617842 (CP 3 1, CP 3 2, CP 3 4, CP 3 5 and CP 3 6) and IEC 61158 Types 3 and 10. It identifies the principles for functional safety communications defined in IEC 617843 that are relevant for this safety communication layer. This safety communication layer is intended for implementation in safety devices only. NOTE

Additional terms were added in Clause 3

a)       Clause B

h)      Bibliography introduced

Natural macromolecules

Inner cord(s): The tests must be conducted using an internal blind

smokeless tobacco products and cigarette filler

By complying with these best industry recommendations

BS EN 16943 is a European standard that provides the ICP-OES method for the determination of calcium

and icing can also be considered

— whole-body vibration (see ISO 2631‑1

Manufacturers stationary gas turbine

Halon 1211 has for many years been a recognized effective medium for the extinction of flammable liquid fires and fires in the presence of electrical risks