Standards Development

Scope

This part of IEC 60947 series provides additional requirements to those given in IEC 60947-5- 2. It addresses the fault performance aspects of proximity devices with a defined behaviour under fault conditions (PDDB). It does not address any other characteristics that can be required for specific applications.

This document does not apply to protective equipment to detect the presence of persons, that are covered by IEC 61496 series or IEC/TS 62998 series.

This product standard does not cover proximity devices with analogue output.

This product standard does not deal with any specific requirements on acoustic noise as the noise emission of proximity devices is not considered to be a relevant hazard.

For a PDDB used in applications where additional characteristics, dealt with in other standards, are required, the requirements of all relevant standards apply.

Editor Comment:

Remark regarding the following option1 and option2:

Replies to Questionnaire to National Committees 121A(secretary)/12757/RQ 2021-08-23:

Option 1 is the preferred solution for the future edition of IEC 60947-5-3.

TC44 and other technical committees are invited to submit CD1 comments on the topic scope (option1 and option2).

(option1) A PDDB product is intended to be used as sensing subsystem of a safety related control system according to IEC 62061 or ISO 13849-1. Depending on construction principles and complexity, a safety related proximity switch is designed and evaluated according to IEC 62061, or ISO 13849-1, or IEC 61508 series. This document provides product specific requirements for the relevant application of IEC 62061, ISO 13849-1, and IEC 61508 to PDDB products.

(option2) A PDDB product is intended to be used as sensing subsystem of a safety related control system according to IEC 62061 or ISO 13849-1. Depending on construction principles and complexity, this standard is based on product development of IEC 61508 in order to meet the product specific requirements of IEC 62061 and/or ISO 13849.

The use of this product standard alone does not demonstrate suitability for the implementation of any specific safety related functionality. In particular, this product standard does not provide requirements for the actuation characteristics of a PDDB, or for means to reduce the effects of mutual interference between devices, e.g., coded targets. Therefore, these and any other application-specific requirements will need to be considered in addition to the requirements of this product standard.

NOTE 1Due to their behaviour under fault conditions, PDDBs can, for example, be used as interlocking devices (see ISO 14119).

NOTE 2 This document does not include combined separated proximity switches put on the market as one product