Functional safety of electrical/ electronic/ programmable electronic safety-related systems - Examples of methods for the determination of safety integrity levels shop-only Alternative methods may be used

Alternative methods may be used if shown to be equivalent

BS EN 4127 specifies the characteristics of bolts

ISBN 0 580 39486 7

This European Standard gives requirements for improving the safety of existing lifts with the aim of reaching an equivalent level of safety to that of a newly installed lift by the application of today’s state of the art for safety

NOTE Guidance on testing and inspection is given in section 2 of BS 5655-6

Functional safety of electrical/ electronic/ programmable electronic safety-related systems - Examples of methods for the determination of safety integrity levels shop-only Alternative methods may be usedBS EN 61508 5: 2002 provides information on: the underlying concepts of risk and the relationship of risk to safety integrity (see annex A) a number of methods that will enable the safety integrity levels for the E E PE safety relatedsystems, other technology safety related systems and external risk reduction facilities to be determined (see annexes B, C, D and E).