DIN EN 61784-3-3

Abstract

This part of the IEC 61784-3 series specifies a safety communication layer (services and protocol) based on CPF 3 of IEC 61784-1, IEC 61784-2 (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 61784-3 that are relevant for this safety communication layer. <br>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. <br>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. <br>This part provides guidelines for both developers and assessors of compliant devices and systems. <br>NOTE 2 The resulting SIL claim of a system depends on the implementation of the selected functional safety communication profile within this system &#8211; 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. <br>¹ In the following pages of this standard, "this part" will be used for "this part of the IEC 61784-3 series". <br>² In the following pages of this standard, "IEC 61508" will be used for "IEC 61508 series".