CEI EN 61784-3-6

This part of the IEC 61784-3 series specifies a safety
communication layer (services and protocol) based on CPF 6 of IEC
61784-1, IEC 61784-2 and IEC 61158 Type 8. It identifies the
principles for functional safety communications defined in IEC
61784-3 that are relevant for this safety communication layer.

NOTE 1 It does not cover electrical safety and intrinsic safety
aspects. Electrical safety relates to hazards such as electrical
shock. Intrinsic safety relates to hazards associated with
potentially explosive atmospheres.

This part¹ defines mechanisms for the transmission of
safety-relevant messages among participants within a distributed
network using fieldbus technology in accordance with the
requirements of IEC 61508 series² for functional safety.
These mechanisms may be used in various industrial applications
such as process control, manufacturing automation and
machinery.

This part provides guidelines for both developers and assessors
of compliant devices and systems.

NOTE 2 The resulting SIL claim of a system depends on the
implementation of the selected functional safety communication
profile within this system – implementation of a functional safety
communication profile according to this part in a standard device
is not sufficient to qualify it as a safety device.

¹ In the following pages of this standard, "this
part" will be used for "this part of the IEC 61784-3 series".

² In the following pages of this standard, "IEC
61508" will be used for "IEC 61508 series".