ABB AC500-S - 1.6 Functional safety certification

TWCDT Total Worst Case Delay Time
ULP Unit in the Last Place, which is the spacing between floating-point numbers, i.e., the
value the least significant bit represents if it is 1 (see
http://en.wikipedia.org/wiki/Unit_in_the_last_place for more details).
1.6 Functional safety certification
The AC500-S Safety Modules are safety-related up to SIL3 according to IEC 61508 ed. 2, IEC 62061 and
Performance Level e according to ISO 13849, as certified by TÜV Süd Rail GmbH (Germany).
Fig. 1: Certificate AC500-S
Introduction
Functional safety certification
30.03.2017 AC500-S 13