1.1 This document is applicable to the product family of escalators and moving walks used in residential buildings, offices, hospitals, hotels, industrial plants, etc. This document covers those aspects that need to be addressed when programmable electronic systems are used to carry out electric safety functions for escalators and moving walks (PESSRAE). This document is applicable for escalator and moving walk safety functions that are identified in escalator and moving walk codes, standards, or laws that reference this document for PESSRAE application. The safety integrity levels (SILs) specified in this document are understood to be valid for PESSRAE application in the context of the referenced escalator and moving walk codes, standards, and laws in the Bibliography.
1.2 This document is also applicable for the application of PESSRAE that are new or deviate from those described in this document.
1.3 The requirements of this document regarding electrical safety/protective devices are such that it is not necessary to take into consideration the possibility of a failure of an electric safety/protective device complying with all the requirements of this document and other relevant standards.
